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        "titulo" => "Informe 2017 de la Iniciativa Global para el Diagn&#243;stico&#44; Tratamiento y Prevenci&#243;n de la Enfermedad Pulmonar Obstructiva Cr&#243;nica&#58; Resumen Ejecutivo de GOLD"
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">This Executive Summary of the Global Strategy for the Diagnosis&#44; Management&#44; and Prevention of COPD &#40;GOLD&#41; 2017 Report is based on peer-reviewed publications to October 2016&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">Levels of evidence are assigned to evidence-based recommendations where appropriate&#46; Categories used to grade the levels of evidence are provided in Table S1 in the Supplementary Appendix&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Definition and Factors That Influence COPD Development and Progression</span><p id="par0015" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Key Points&#91;TS&#58; Set all &#8220;Key Points&#8221;&#93; boxes as they were in original GOLD &#40;http&#58;&#47;&#47;www&#46;atsjournals&#46;org&#47;doi&#47;pdf&#47;10&#46;1164&#47;rccm&#46;201204-0596PP&#41;&#46;&#93;</span><ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">&#8226;</span><p id="par0020" class="elsevierStylePara elsevierViewall">COPD is a common&#44; preventable and treatable disease that is characterized by persistent respiratory symptoms and airflow limitation due to airway and&#47;or alveolar abnormalities usually caused by significant exposure to noxious particles or gases&#46;</p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">&#8226;</span><p id="par0025" class="elsevierStylePara elsevierViewall">Dyspnea&#44; cough and&#47;or sputum production are the most frequent symptoms&#59; symptoms are commonly under-reported by patients&#46;</p></li><li class="elsevierStyleListItem" id="lsti0015"><span class="elsevierStyleLabel">&#8226;</span><p id="par0030" class="elsevierStylePara elsevierViewall">Tobacco smoking is the main risk exposure for COPD&#44; but environmental exposures like biomass fuel exposure and air pollution may contribute&#46; Besides exposures&#44; host factors &#40;genetic abnormalities&#44; abnormal lung development and accelerated aging&#41; predispose individuals to develop COPD&#46;</p></li><li class="elsevierStyleListItem" id="lsti0020"><span class="elsevierStyleLabel">&#8226;</span><p id="par0035" class="elsevierStylePara elsevierViewall">COPD may be punctuated by acute worsening of respiratory symptoms&#44; called exacerbations&#46;</p></li><li class="elsevierStyleListItem" id="lsti0025"><span class="elsevierStyleLabel">&#8226;</span><p id="par0040" class="elsevierStylePara elsevierViewall">In most patients&#44; COPD is associated with significant concomitant chronic diseases&#44; which increase morbidity and mortality&#46;</p></li></ul></p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Definition and Pathogenesis</span><p id="par0045" class="elsevierStylePara elsevierViewall">COPD is a common&#44; preventable and treatable disease that is characterized by persistent respiratory symptoms and airflow limitation that is due to airway and&#47;or alveolar abnormalities usually caused by significant exposure to noxious particles or gases&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">The chronic airflow limitation that characterizes COPD is caused by a mixture of small airways disease &#40;e&#46;g&#46;&#44; obstructive bronchiolitis&#41; and parenchymal destruction &#40;emphysema&#41;&#44; the relative contributions of which vary from person to person&#46; Chronic inflammation causes structural changes&#44; small airways narrowing and destruction of lung parenchyma&#46; A loss of small airways may contribute to airflow limitation and mucociliary dysfunction&#44; a characteristic feature of the disease&#46;</p><p id="par0055" class="elsevierStylePara elsevierViewall">Chronic respiratory symptoms may precede the development of airflow limitation and be associated with acute respiratory events&#46;<a class="elsevierStyleCrossRef" href="#bib1000"><span class="elsevierStyleSup">1</span></a> Chronic respiratory symptoms may exist in individuals with normal spirometry<a class="elsevierStyleCrossRefs" href="#bib1000"><span class="elsevierStyleSup">1&#44;2</span></a> and a significant number of smokers without airflow limitation have structural evidence of lung disease manifested by the presence of emphysema&#44; airway wall thickening and gas trapping&#46;<a class="elsevierStyleCrossRefs" href="#bib1000"><span class="elsevierStyleSup">1&#44;2</span></a></p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Factors That Influence Disease Development and Progression</span><p id="par0060" class="elsevierStylePara elsevierViewall">Although cigarette smoking is the most well studied COPD risk factor&#44; epidemiologic studies demonstrate that non-smokers may also develop chronic airflow limitation&#46;<a class="elsevierStyleCrossRef" href="#bib1010"><span class="elsevierStyleSup">3</span></a> Compared to smokers with COPD&#44; never smokers with chronic airflow limitation have fewer symptoms&#44; milder disease and a lower burden of systemic inflammation&#46;<a class="elsevierStyleCrossRef" href="#bib1015"><span class="elsevierStyleSup">4</span></a> Never smokers with chronic airflow limitation do not have an increased risk of lung cancer&#44; or cardiovascular comorbidities&#59; however&#44; they have an increased risk of pneumonia and mortality from respiratory failure&#46;<a class="elsevierStyleCrossRef" href="#bib1015"><span class="elsevierStyleSup">4</span></a></p><p id="par0065" class="elsevierStylePara elsevierViewall">Processes occurring during gestation&#44; birth&#44; and exposures during childhood and adolescence affect lung growth&#46;<a class="elsevierStyleCrossRefs" href="#bib1020"><span class="elsevierStyleSup">5&#44;6</span></a> Reduced maximal attained lung function &#40;as measured by spirometry&#41; may identify individuals at increased risk for COPD&#46;<a class="elsevierStyleCrossRefs" href="#bib1005"><span class="elsevierStyleSup">2&#44;7</span></a> Factors in early life termed &#8220;childhood disadvantage factors&#8221; are as important as heavy smoking in predicting lung function in adult life&#46;<a class="elsevierStyleCrossRef" href="#bib1035"><span class="elsevierStyleSup">8</span></a> An examination of three different longitudinal cohorts found that approximately 50&#37; of patients developed COPD due to an accelerated decline in FEV<span class="elsevierStyleInf">1</span>&#59; the other 50&#37; developed COPD due to abnormal lung growth and development&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">Cigarette smokers have a higher prevalence of respiratory symptoms and lung function abnormalities&#44; a greater annual rate of decline in FEV<span class="elsevierStyleInf">1</span>&#44; and a greater COPD mortality rate than non-smokers&#46;<a class="elsevierStyleCrossRef" href="#bib1040"><span class="elsevierStyleSup">9</span></a> Other types of tobacco &#40;e&#46;g&#46;&#44; pipe&#44; cigar&#44; water pipe&#41;<a class="elsevierStyleCrossRefs" href="#bib1045"><span class="elsevierStyleSup">10&#8211;12</span></a> and marijuana<a class="elsevierStyleCrossRef" href="#bib1060"><span class="elsevierStyleSup">13</span></a> are also risk factors for COPD&#46; Passive exposure to cigarette smoke&#44; also known as environmental tobacco smoke &#40;ETS&#41;&#44; may also contribute to respiratory symptoms and COPD<a class="elsevierStyleCrossRef" href="#bib1065"><span class="elsevierStyleSup">14</span></a> by increasing the lung&#39;s total burden of inhaled particles and gases&#46; Smoking during pregnancy may pose a risk for the fetus&#44; by affecting in utero lung growth and development&#44; and possibly priming the immune system&#46;<a class="elsevierStyleCrossRef" href="#bib1070"><span class="elsevierStyleSup">15</span></a></p><p id="par0075" class="elsevierStylePara elsevierViewall">Occupational exposures&#44; including organic and inorganic dusts&#44; chemical agents and fumes&#44; are under-appreciated risk factors for COPD development&#46;<a class="elsevierStyleCrossRefs" href="#bib1075"><span class="elsevierStyleSup">16&#44;17</span></a></p><p id="par0080" class="elsevierStylePara elsevierViewall">Wood&#44; animal dung&#44; crop residues&#44; and coal&#44; typically burned in open fires or poorly functioning stoves&#44; may lead to indoor air pollution&#46;<a class="elsevierStyleCrossRef" href="#bib1085"><span class="elsevierStyleSup">18</span></a> Indoor pollution from biomass cooking and heating&#44; in poorly ventilated dwellings&#44; is a risk for COPD&#46;<a class="elsevierStyleCrossRefs" href="#bib1090"><span class="elsevierStyleSup">19&#8211;21</span></a></p><p id="par0085" class="elsevierStylePara elsevierViewall">Asthma may be a risk for the development of chronic airflow limitation and COPD&#46;<a class="elsevierStyleCrossRef" href="#bib1105"><span class="elsevierStyleSup">22</span></a></p><p id="par0090" class="elsevierStylePara elsevierViewall">Airway hyper-responsiveness can exist without a clinical diagnosis of asthma and is an independent predictor of COPD and respiratory mortality in population studies<a class="elsevierStyleCrossRefs" href="#bib1110"><span class="elsevierStyleSup">23&#44;24</span></a> and may indicate a risk for excessive lung function decline in mild COPD&#46;<a class="elsevierStyleCrossRef" href="#bib1120"><span class="elsevierStyleSup">25</span></a></p><p id="par0095" class="elsevierStylePara elsevierViewall">A history of severe childhood respiratory infection is associated with reduced lung function and increased respiratory symptoms in adulthood&#46;<a class="elsevierStyleCrossRef" href="#bib1125"><span class="elsevierStyleSup">26</span></a> HIV infection accelerates the onset of smoking-related emphysema and COPD<a class="elsevierStyleCrossRef" href="#bib1130"><span class="elsevierStyleSup">27</span></a>&#59; tuberculosis has also been identified as a risk for COPD as well as a potential comorbidity&#46;<a class="elsevierStyleCrossRefs" href="#bib1135"><span class="elsevierStyleSup">28&#8211;30</span></a></p><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Diagnosis and Initial Assessment</span><p id="par0100" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Key Points</span><ul class="elsevierStyleList" id="lis0010"><li class="elsevierStyleListItem" id="lsti0030"><span class="elsevierStyleLabel">&#8226;</span><p id="par0105" class="elsevierStylePara elsevierViewall">COPD should be considered in any patient with dyspnea&#44; chronic cough or sputum production&#44; and&#47;or a history of exposure to risk factors&#46;</p></li><li class="elsevierStyleListItem" id="lsti0035"><span class="elsevierStyleLabel">&#8226;</span><p id="par0110" class="elsevierStylePara elsevierViewall">Spirometry is required to make the diagnosis&#59; a post-bronchodilator FEV<span class="elsevierStyleInf">1</span>&#47;FVC<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#46;70 confirms the presence of persistent airflow limitation&#46;</p></li><li class="elsevierStyleListItem" id="lsti0040"><span class="elsevierStyleLabel">&#8226;</span><p id="par0115" class="elsevierStylePara elsevierViewall">The goals of COPD assessment are to determine the level of airflow limitation&#44; the impact of disease on the patient&#39;s health status&#44; and the risk of future events &#40;such as exacerbations&#44; hospital admissions&#44; or death&#41; to guide therapy&#46;</p></li><li class="elsevierStyleListItem" id="lsti0045"><span class="elsevierStyleLabel">&#8226;</span><p id="par0120" class="elsevierStylePara elsevierViewall">Concomitant chronic diseases occur frequently in COPD patients and should be treated because they can independently affect mortality and hospitalizations&#46;</p></li></ul></p></span></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Diagnosis</span><p id="par0125" class="elsevierStylePara elsevierViewall">COPD should be considered in any patient with dyspnea&#44; chronic cough or sputum production&#44; and&#47;or a history of exposure to risk factors for the disease &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a> and <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46; Spirometry is required to make the diagnosis in this clinical context<a class="elsevierStyleCrossRef" href="#bib1150"><span class="elsevierStyleSup">31</span></a>&#59; a post-bronchodilator FEV<span class="elsevierStyleInf">1</span>&#47;FVC<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#46;70 confirms the presence of persistent airflow limitation and identifies the presence of COPD in patients with appropriate symptoms and predisposing risks&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><elsevierMultimedia ident="tbl0005"></elsevierMultimedia></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Symptoms</span><p id="par0130" class="elsevierStylePara elsevierViewall">Chronic and progressive dyspnea is the most characteristic symptom of COPD&#46;</p><p id="par0135" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Dyspnea</span>&#46; Dyspnea is a major cause of the disability and anxiety in COPD&#46;<a class="elsevierStyleCrossRef" href="#bib1155"><span class="elsevierStyleSup">32</span></a> The terms used to describe dyspnea vary individually and culturally&#46;<a class="elsevierStyleCrossRef" href="#bib1160"><span class="elsevierStyleSup">33</span></a></p><p id="par0140" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Cough</span>&#46; Chronic cough is often the first symptom of COPD and frequently discounted by the patient as a consequence of smoking and&#47;or environmental exposures&#46;</p><p id="par0145" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Sputum production</span>&#46; Regular sputum production<span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleUnderline">&#62;</span><span class="elsevierStyleHsp" style=""></span>3 months in 2 consecutive years is the classical definition of chronic bronchitis<a class="elsevierStyleCrossRef" href="#bib1165"><span class="elsevierStyleSup">34</span></a>&#59; an arbitrary definition that does not reflect the range of sputum production reported in COPD&#46; Patients producing large volumes of sputum may have underlying bronchiectasis&#46;</p><p id="par0150" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Wheezing and chest tightness</span>&#46; Wheezing and chest tightness may vary between days&#44; and throughout a single day&#46;</p><p id="par0155" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Additional features in severe disease</span>&#46; Fatigue&#44; weight loss and anorexia are common in patients with more severe forms of COPD&#46;<a class="elsevierStyleCrossRefs" href="#bib1170"><span class="elsevierStyleSup">35&#44;36</span></a></p></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Medical History</span><p id="par0160" class="elsevierStylePara elsevierViewall">A detailed medical history of any patient who is known&#44; or suspected&#44; to have COPD should include&#58;<ul class="elsevierStyleList" id="lis0015"><li class="elsevierStyleListItem" id="lsti0050"><span class="elsevierStyleLabel">&#8226;</span><p id="par0165" class="elsevierStylePara elsevierViewall">Exposure to risk factors&#44; such as smoking and occupational or environmental exposures&#46;</p></li><li class="elsevierStyleListItem" id="lsti0055"><span class="elsevierStyleLabel">&#8226;</span><p id="par0170" class="elsevierStylePara elsevierViewall">Past medical history&#44; including asthma&#44; allergy&#44; sinusitis&#44; or nasal polyps&#59; respiratory infections in childhood&#59; other chronic respiratory and non-respiratory diseases&#46;</p></li><li class="elsevierStyleListItem" id="lsti0060"><span class="elsevierStyleLabel">&#8226;</span><p id="par0175" class="elsevierStylePara elsevierViewall">Family history of COPD or other chronic respiratory diseases&#46;</p></li><li class="elsevierStyleListItem" id="lsti0065"><span class="elsevierStyleLabel">&#8226;</span><p id="par0180" class="elsevierStylePara elsevierViewall">Pattern of symptom development&#58; age of onset&#44; type of symptom&#44; more frequent or prolonged &#8220;winter colds&#44;&#8221; and social restriction&#46;</p></li><li class="elsevierStyleListItem" id="lsti0070"><span class="elsevierStyleLabel">&#8226;</span><p id="par0185" class="elsevierStylePara elsevierViewall">History of exacerbations or previous hospitalizations for a respiratory disorder&#46;</p></li><li class="elsevierStyleListItem" id="lsti0075"><span class="elsevierStyleLabel">&#8226;</span><p id="par0190" class="elsevierStylePara elsevierViewall">Presence of comorbidities&#44; such as heart disease&#44; osteoporosis&#44; musculoskeletal disorders&#44; and malignancies&#46;</p></li><li class="elsevierStyleListItem" id="lsti0080"><span class="elsevierStyleLabel">&#8226;</span><p id="par0195" class="elsevierStylePara elsevierViewall">Impact of disease on patient&#39;s life&#44; including limitation of activity&#44; missed work and economic impact&#44; and feelings of depression or anxiety&#46;</p></li><li class="elsevierStyleListItem" id="lsti0085"><span class="elsevierStyleLabel">&#8226;</span><p id="par0200" class="elsevierStylePara elsevierViewall">Social and family support available to the patient&#46;</p></li><li class="elsevierStyleListItem" id="lsti0090"><span class="elsevierStyleLabel">&#8226;</span><p id="par0205" class="elsevierStylePara elsevierViewall">Possibilities for reducing risk factors&#44; especially smoking cessation&#46;</p></li></ul></p><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Physical examination</span><p id="par0210" class="elsevierStylePara elsevierViewall">Although important for general health&#44; a physical examination is rarely diagnostic in COPD&#46; Physical signs of airflow limitation&#47;hyperinflation are usually not identifiable until significantly impaired lung function is present&#46;<a class="elsevierStyleCrossRefs" href="#bib1180"><span class="elsevierStyleSup">37&#44;38</span></a></p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Spirometry</span><p id="par0215" class="elsevierStylePara elsevierViewall">Spirometry is the most reproducible and objective measurement of airflow limitation&#46; It is a noninvasive and readily available test&#46; Good quality spirometry is possible in any healthcare setting&#59; all healthcare workers who care for COPD patients should have access to spirometry&#46;</p><p id="par0220" class="elsevierStylePara elsevierViewall">A post-bronchodilator fixed ratio of FEV<span class="elsevierStyleInf">1</span>&#47;FVC<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#46;70 is the spirometric criterion for airflow limitation&#46; This criterion is simple and independent of reference values and has been used in numerous clinical trials&#46; However&#44; it may result in more frequent diagnosis of COPD in the elderly&#44;<a class="elsevierStyleCrossRefs" href="#bib1190"><span class="elsevierStyleSup">39&#44;40</span></a> and less frequent diagnosis in adults<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>45 years&#44;<a class="elsevierStyleCrossRef" href="#bib1195"><span class="elsevierStyleSup">40</span></a> especially in mild disease&#44; compared to a cut-off based on the lower limit of normal &#40;LLN&#41; values for FEV<span class="elsevierStyleInf">1</span>&#47;FVC&#46; Several limitations occur with using LLN as the diagnostic criterion for spirometric obstruction&#58; 1&#41; LLN values are dependent on the choice of reference equations that use post-bronchodilator FEV<span class="elsevierStyleInf">1</span>&#44; 2&#41; there are no longitudinal studies that validate using the LLN&#44; and 3&#41; studies using LLN in populations where smoking is not the major cause of COPD are lacking&#46;</p><p id="par0225" class="elsevierStylePara elsevierViewall">Normal spirometry may be defined by a new approach from the Global Lung Initiative &#40;GLI&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib1200"><span class="elsevierStyleSup">41&#44;42</span></a> Using GLI equations&#44; <span class="elsevierStyleItalic">z</span> scores were calculated for FEV<span class="elsevierStyleInf">1</span>&#44; FVC&#44; and FEV<span class="elsevierStyleInf">1</span>&#47;FVC and compared to fixed ratio data&#46; The findings suggest that among adults with GLI-defined normal spirometry&#44; the use of a fixed ratio may misclassify individuals as having respiratory impairment&#46; These findings await additional study in other cohorts&#46;</p><p id="par0230" class="elsevierStylePara elsevierViewall">The risk of misdiagnosis and over-treatment using the fixed ratio as a diagnostic criterion is limited since spirometry is only one parameter used to establish the clinical diagnosis of COPD&#46; GOLD favors using the fixed ratio over LLN since diagnostic simplicity and consistency are crucial for the busy clinician&#46;</p><p id="par0235" class="elsevierStylePara elsevierViewall">Assessing the degree of reversibility of airflow limitation &#40;e&#46;g&#46;&#44; measuring FEV<span class="elsevierStyleInf">1</span> before and after bronchodilator or corticosteroids&#41; to make therapeutic decisions is not recommended<a class="elsevierStyleCrossRef" href="#bib1210"><span class="elsevierStyleSup">43</span></a> since it does not aid the diagnosis of COPD&#44; differentiate COPD from asthma&#44; or predict the long-term response to treatment&#46;<a class="elsevierStyleCrossRef" href="#bib1215"><span class="elsevierStyleSup">44</span></a></p><p id="par0240" class="elsevierStylePara elsevierViewall">In asymptomatic individuals without exposures to tobacco or other noxious stimuli&#44; screening spirometry is not indicated&#46; However&#44; in those with symptoms and&#47;or risk factors &#40;e&#46;g&#46;&#44;<span class="elsevierStyleHsp" style=""></span>&#62;<span class="elsevierStyleHsp" style=""></span>20 pack-years of smoking or recurrent chest infections&#41;&#44; the diagnostic yield for COPD is relatively high and spirometry should be considered&#46;<a class="elsevierStyleCrossRefs" href="#bib1220"><span class="elsevierStyleSup">45&#44;46</span></a> GOLD advocates active case finding<a class="elsevierStyleCrossRefs" href="#bib1220"><span class="elsevierStyleSup">45&#44;47</span></a> i&#46;e&#46;&#44; performing spirometry in patients with symptoms and&#47;or risk factors&#44; but not routine screening spirometry in asymptomatic individuals without COPD risk factors&#46;</p></span></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Assessment</span><p id="par0245" class="elsevierStylePara elsevierViewall">The goals of COPD assessment to guide therapy are 1&#41; to determine the level of airflow limitation&#59; 2&#41; to define its impact on the patient&#39;s health status and&#59; 3&#41; identify the risk of future events &#40;such as exacerbations&#44; hospital admissions or death&#41;&#46;</p><p id="par0250" class="elsevierStylePara elsevierViewall">To achieve these goals&#44; COPD assessment must consider separately the following aspects of the disease&#58;<ul class="elsevierStyleList" id="lis0020"><li class="elsevierStyleListItem" id="lsti0095"><span class="elsevierStyleLabel">&#8226;</span><p id="par0255" class="elsevierStylePara elsevierViewall">Presence and severity of the spirometric abnormality</p></li><li class="elsevierStyleListItem" id="lsti0100"><span class="elsevierStyleLabel">&#8226;</span><p id="par0260" class="elsevierStylePara elsevierViewall">Current nature and magnitude of symptoms</p></li><li class="elsevierStyleListItem" id="lsti0105"><span class="elsevierStyleLabel">&#8226;</span><p id="par0265" class="elsevierStylePara elsevierViewall">History&#47;future risk of exacerbations</p></li><li class="elsevierStyleListItem" id="lsti0110"><span class="elsevierStyleLabel">&#8226;</span><p id="par0270" class="elsevierStylePara elsevierViewall">Presence of comorbidities</p></li></ul></p><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Classification of severity of airflow limitation</span><p id="par0275" class="elsevierStylePara elsevierViewall">Spirometry should be performed after administration of an adequate dose of at least one short-acting inhaled bronchodilator in order to minimize variability&#46;</p><p id="par0280" class="elsevierStylePara elsevierViewall">The role of spirometry for the diagnosis&#44; assessment and follow-up of COPD is summarized in <a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Assessment of symptoms</span><p id="par0285" class="elsevierStylePara elsevierViewall">COPD was previously viewed as a disease largely characterized by breathlessness&#46; A simple measure of breathlessness such as the Modified British Medical Research Council &#40;mMRC&#41; Questionnaire<a class="elsevierStyleCrossRef" href="#bib1235"><span class="elsevierStyleSup">48</span></a> was considered adequate for assessment of symptoms<a class="elsevierStyleCrossRefs" href="#bib1240"><span class="elsevierStyleSup">49&#8211;51</span></a> However&#44; COPD impacts patients well beyond dyspnea&#46;<a class="elsevierStyleCrossRef" href="#bib1255"><span class="elsevierStyleSup">52</span></a> For this reason&#44; a comprehensive assessment of symptoms is recommended&#46; The most comprehensive disease-specific health status questionnaires include the Chronic Respiratory Questionnaire &#40;CRQ&#41;<a class="elsevierStyleCrossRef" href="#bib1260"><span class="elsevierStyleSup">53</span></a> and St&#46; George&#39;s Respiratory Questionnaire &#40;SGRQ&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib1265"><span class="elsevierStyleSup">54</span></a> These are too complex to use in clinical practice&#44; but shorter measures e&#46;g&#46;&#44; the COPD Assessment Test &#40;CAT<span class="elsevierStyleSup">TM</span>&#41; are suitable&#46;</p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Choice of thresholds</span><p id="par0290" class="elsevierStylePara elsevierViewall">SGRQ scores<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>25 are uncommon in COPD patients<a class="elsevierStyleCrossRef" href="#bib1270"><span class="elsevierStyleSup">55</span></a> and scores &#8805; 25 are very uncommon in healthy persons&#46;<a class="elsevierStyleCrossRefs" href="#bib1275"><span class="elsevierStyleSup">56&#44;57</span></a> The equivalent cut-point for the CAT<span class="elsevierStyleSup">TM</span> is 10&#46;<a class="elsevierStyleCrossRef" href="#bib1285"><span class="elsevierStyleSup">58</span></a> A mMRC threshold of &#8805; 2 is used to separate &#8220;less breathlessness&#8221; from &#8220;more breathlessness&#8221;&#46;</p></span><span id="sec0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Assessment of exacerbation risk</span><p id="par0295" class="elsevierStylePara elsevierViewall">The best predictor of frequent exacerbations &#40;defined as &#8805; 2 exacerbations per year&#41; is a history of earlier treated events&#46;<a class="elsevierStyleCrossRef" href="#bib1290"><span class="elsevierStyleSup">59</span></a> Hospitalization for a COPD exacerbation has a poor prognosis and an increased risk of death&#46;<a class="elsevierStyleCrossRef" href="#bib1295"><span class="elsevierStyleSup">60</span></a></p><p id="par0300" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Blood eosinophil count</span>&#46; Post-hoc analysis of two clinical trials in COPD patients with an exacerbation history showed that higher blood eosinophil counts may predict increased exacerbation rates in patients treated with long acting beta agonists &#40;LABA&#41; &#40;without inhaled corticosteroid&#44; ICS&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib1300"><span class="elsevierStyleSup">61&#44;62</span></a> The treatment effect of ICS&#47;LABA versus LABA on exacerbations was greater in patients with higher blood eosinophil counts&#46; These findings suggest that blood eosinophil counts are 1&#41; a biomarker of exacerbation risk in patients with a history of exacerbations and 2&#41; can predict the effects of ICS on exacerbation prevention&#46; Prospective trials are required to validate the use of blood eosinophil counts to predict ICS effects&#44; to determine a cut-off threshold for blood eosinophils that predicts exacerbation risk&#44; and to clarify blood eosinophil cut-off values that could be used in clinical practice&#46;</p></span><span id="sec0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Assessment of concomitant chronic diseases &#40;comorbidities&#41;</span><p id="par0305" class="elsevierStylePara elsevierViewall">Patients with COPD often have important concomitant chronic illnesses as COPD represents an important component of multimorbidity particularly in the elderly&#46;<a class="elsevierStyleCrossRefs" href="#bib1295"><span class="elsevierStyleSup">60&#44;63&#8211;65</span></a></p></span><span id="sec0085" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Revised combined COPD assessment</span><p id="par0310" class="elsevierStylePara elsevierViewall">The &#8220;ABCD&#8221; assessment tool of the 2011 GOLD Report was a major step forward from the simple spirometric grading system of earlier GOLD Reports because it incorporated patient-reported outcomes and highlighted the importance of exacerbation prevention in COPD management&#46; However&#44; there were important limitations&#46; ABCD assessment performed no better than spirometric grades for mortality prediction&#44; or other important health outcomes&#46;<a class="elsevierStyleCrossRefs" href="#bib1325"><span class="elsevierStyleSup">66&#8211;68</span></a> Moreover&#44; group &#8220;D&#8221; outcomes were modified by two parameters&#58; lung function and&#47;or exacerbation history&#44; which caused confusion&#46;<a class="elsevierStyleCrossRef" href="#bib1340"><span class="elsevierStyleSup">69</span></a> To address these concerns&#44; the 2017 GOLD Report provides a refinement of the ABCD assessment that separates spirometric grades from &#8220;ABCD&#8221; groupings&#46; For some therapy recommendations&#44; especially pharmacologic treatments&#44; ABCD groups are derived exclusively from patient symptoms and their exacerbation history&#46; However&#44; spirometry&#44; in conjunction with patient symptoms and exacerbation history&#44; remains vital for the diagnosis&#44; prognostication and consideration of other important therapeutic approaches&#44; especially non-pharmacological therapies&#46; This new approach to assessment is illustrated in <a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0315" class="elsevierStylePara elsevierViewall">In the refined assessment scheme&#44; patients should undergo spirometry to determine the severity of airflow limitation &#40;i&#46;e&#46;&#44; spirometric grade&#41;&#46; They should also undergo assessment of either dyspnea using mMRC or symptoms using CAT<span class="elsevierStyleSup">TM</span>&#46; Finally&#44; their history of exacerbations &#40;including prior hospitalizations&#41; should be recorded&#46;</p><p id="par0320" class="elsevierStylePara elsevierViewall">The number provides information regarding severity of airflow limitation &#40;spirometric grades 1 to 4&#41; while the letter &#40;groups A to D&#41; provides information regarding symptom burden and risk of exacerbation&#46; FEV<span class="elsevierStyleInf">1</span> is a very important parameter at the population-level in the prediction of important clinical outcomes such as mortality and hospitalizations or prompting consideration for non-pharmacologic therapies such as lung reduction or lung transplantation&#46; However&#44; at the individual patient level&#44; FEV<span class="elsevierStyleInf">1</span> loses precision and thus cannot be used alone to determine all therapeutic options&#46; Furthermore&#44; in some circumstances&#44; such as during hospitalization or urgent presentation to the clinic or emergency room&#44; the ability to assess patients based on symptoms and exacerbation history&#44; independent of the spirometric value&#44; allows clinicians to initiate a treatment plan based on the revised ABCD scheme&#46; This approach acknowledges the limitations of FEV<span class="elsevierStyleInf">1</span> in making treatment decisions for individualized patient care and highlights the importance of patient symptoms and exacerbation risks in guiding therapies in COPD&#46; The separation of airflow limitation from clinical parameters makes it clearer what is being evaluated and ranked&#46; This should facilitate more precise treatment recommendations based on parameters that are driving the patient&#39;s symptoms at any given time&#46;</p><p id="par0325" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Example</span>&#46; Consider two patients - both patients with FEV<span class="elsevierStyleInf">1</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>30&#37; of predicted&#44; CAT scores of 18 and one with no exacerbations in the past year&#44; and the other with three exacerbations in the past year&#46; Both would have been labelled GOLD D in the prior classification scheme&#46; However&#44; with the new proposed scheme&#44; the subject with 3 exacerbations in the past year would be labelled GOLD grade 4&#44; group D&#46; Individual decisions on pharmacotherapeutic approaches would use the recommendations based on the ABCD assessment to treat the patient&#39;s major problem at this time&#44; i&#46;e&#46;&#44; persistent exacerbations&#46; The other patient&#44; who has had no exacerbations&#44; would be classified as GOLD grade 4&#44; group B&#46; In such patients &#8212;besides pharmacotherapy and rehabilitation &#8212;lung reduction&#44; lung transplantation or bullectomy may be important therapeutic considerations given their symptom burden and level of spirometric limitation&#46;</p></span><span id="sec0090" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Alpha-1 antitrypsin deficiency</span><p id="par0330" class="elsevierStylePara elsevierViewall">The World Health Organization recommends that all patients with a diagnosis of COPD be screened once for alpha-1 antitrypsin deficiency&#46;<a class="elsevierStyleCrossRef" href="#bib1345"><span class="elsevierStyleSup">70</span></a> A low concentration &#40;&#60; 20&#37; normal&#41; is suggestive of homozygous deficiency&#46; Family members should be screened and together with the patient referred to specialist centres for advice and management&#46;</p></span><span id="sec0095" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Additional investigations</span><p id="par0335" class="elsevierStylePara elsevierViewall">In order to rule out other concomitant disease contributing to respiratory symptoms&#44; or in cases where patients do not respond to the treatment plan as expected&#44; additional testing may be required&#46; Thoracic imaging &#40;chest x-ray&#44; chest CT&#41;&#59; assessment of lung volumes and&#47;or diffusion capacity&#44; oximetry and arterial blood gas measurement and exercise testing and assessment of physical activity should be considered&#46;</p><p id="par0340" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Composite scores&#46;</span> The BODE &#40;Body mass index&#44; Obstruction&#44; Dyspnea&#44; and Exercise&#41; method gives a composite score that is a better predictor of subsequent survival than any single component&#46;<a class="elsevierStyleCrossRef" href="#bib1350"><span class="elsevierStyleSup">71</span></a> Simpler alternatives that do not include exercise testing need validation to confirm suitability for routine clinical use&#46;<a class="elsevierStyleCrossRefs" href="#bib1355"><span class="elsevierStyleSup">72&#44;73</span></a></p><p id="par0345" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Differential diagnoses&#46;</span> In some patients&#44; features of asthma and COPD may coexist&#46; The terms Asthma-COPD Overlap Syndrome &#40;ACOS&#41; or Asthma-COPD Overlap &#40;ACO&#41; acknowledge the overlap of these two common disorders causing chronic airflow limitation rather than a distinct syndrome&#46; Most other potential differential diagnoses are easier to distinguish from COPD&#46;</p><p id="par0350" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Other considerations&#46;</span> Some patients without evidence of airflow limitation have evidence of structural lung disease on chest imaging &#40;emphysema&#44; gas trapping&#44; airway wall thickening&#41;&#46; Such patients may report exacerbations of respiratory symptoms or even require treatment with respiratory medications on a chronic basis&#46; Whether these patients have acute or chronic bronchitis&#44; a persistent form of asthma or an earlier presentation of what will become COPD as it is currently defined&#44; is unclear and requires further study&#46;</p></span><span id="sec0100" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Prevention and Maintenance Therapy</span><p id="par0355" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Key Points</span><ul class="elsevierStyleList" id="lis0025"><li class="elsevierStyleListItem" id="lsti0115"><span class="elsevierStyleLabel">&#8226;</span><p id="par0360" class="elsevierStylePara elsevierViewall">Smoking cessation is key&#46; Pharmacotherapy and nicotine replacement increase long-term smoking abstinence rates&#46;</p></li><li class="elsevierStyleListItem" id="lsti0120"><span class="elsevierStyleLabel">&#8226;</span><p id="par0365" class="elsevierStylePara elsevierViewall">The effectiveness and safety of e-cigarettes as a smoking cessation aid is uncertain&#46;</p></li><li class="elsevierStyleListItem" id="lsti0125"><span class="elsevierStyleLabel">&#8226;</span><p id="par0370" class="elsevierStylePara elsevierViewall">Pharmacologic therapy can reduce COPD symptoms&#44; reduce the frequency and severity of exacerbations&#44; and improve health status and exercise tolerance&#46;</p></li><li class="elsevierStyleListItem" id="lsti0130"><span class="elsevierStyleLabel">&#8226;</span><p id="par0375" class="elsevierStylePara elsevierViewall">Each pharmacologic treatment regimen should be individualized and guided by the severity of symptoms&#44; risk of exacerbations&#44; side-effects&#44; comorbidities&#44; drug availability and cost&#44; and the patient&#39;s response&#44; preference and ability to use various drug delivery devices&#46;</p></li><li class="elsevierStyleListItem" id="lsti0135"><span class="elsevierStyleLabel">&#8226;</span><p id="par0380" class="elsevierStylePara elsevierViewall">Inhaler technique needs to be assessed regularly&#46;</p></li><li class="elsevierStyleListItem" id="lsti0140"><span class="elsevierStyleLabel">&#8226;</span><p id="par0385" class="elsevierStylePara elsevierViewall">Influenza and pneumococcal vaccinations decrease the incidence of lower respiratory tract infections&#46;</p></li><li class="elsevierStyleListItem" id="lsti0145"><span class="elsevierStyleLabel">&#8226;</span><p id="par0390" class="elsevierStylePara elsevierViewall">Pulmonary rehabilitation improves symptoms&#44; quality of life&#44; and physical and emotional participation in everyday activities&#46;</p></li><li class="elsevierStyleListItem" id="lsti0150"><span class="elsevierStyleLabel">&#8226;</span><p id="par0395" class="elsevierStylePara elsevierViewall">In patients with severe resting chronic hypoxemia&#44; long-term oxygen therapy improves survival&#46;</p></li><li class="elsevierStyleListItem" id="lsti0155"><span class="elsevierStyleLabel">&#8226;</span><p id="par0400" class="elsevierStylePara elsevierViewall">In patients with stable COPD and resting or exercise-induced moderate desaturation&#44; long-term oxygen treatment should not be prescribed routinely&#44; however&#44; individual patient factors should be considered&#46;</p></li><li class="elsevierStyleListItem" id="lsti0160"><span class="elsevierStyleLabel">&#8226;</span><p id="par0405" class="elsevierStylePara elsevierViewall">In patients with severe chronic hypercapnia and a history of hospitalization for acute respiratory failure&#44; long-term non-invasive ventilation may decrease mortality and prevent re-hospitalization&#46;</p></li><li class="elsevierStyleListItem" id="lsti0165"><span class="elsevierStyleLabel">&#8226;</span><p id="par0410" class="elsevierStylePara elsevierViewall">In select patients with advanced emphysema refractory to optimized medical care&#44; surgical or bronchoscopic interventional treatments may be beneficial&#46;</p></li><li class="elsevierStyleListItem" id="lsti0170"><span class="elsevierStyleLabel">&#8226;</span><p id="par0415" class="elsevierStylePara elsevierViewall">Palliative approaches are effective in controlling symptoms in advanced COPD&#46;</p></li></ul></p></span></span><span id="sec0105" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Smoking Cessation</span><p id="par0420" class="elsevierStylePara elsevierViewall">Smoking cessation influences the natural history of COPD&#46; If effective resources and time are dedicated to smoking cessation&#44; long-term quit success rates of up to 25&#37; can be achieved&#46;<a class="elsevierStyleCrossRef" href="#bib1365"><span class="elsevierStyleSup">74</span></a></p><p id="par0425" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Nicotine replacement products</span>&#46; Nicotine replacement therapy increases long-term smoking abstinence rates<a class="elsevierStyleCrossRefs" href="#bib1370"><span class="elsevierStyleSup">75&#8211;77</span></a> and is more effective than placebo&#46; E-cigarettes are increasingly used as a form of nicotine replacement therapy&#44; although their efficacy remains controversial&#46;<a class="elsevierStyleCrossRefs" href="#bib1385"><span class="elsevierStyleSup">78&#8211;82</span></a></p><p id="par0430" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Pharmacologic products</span>&#46; Varenicline&#44;<a class="elsevierStyleCrossRef" href="#bib1410"><span class="elsevierStyleSup">83</span></a> bupropion&#44;<a class="elsevierStyleCrossRef" href="#bib1415"><span class="elsevierStyleSup">84</span></a> and nortriptyline<a class="elsevierStyleCrossRef" href="#bib1420"><span class="elsevierStyleSup">85</span></a> increase long-term quit rates&#44;<a class="elsevierStyleCrossRef" href="#bib1420"><span class="elsevierStyleSup">85</span></a> but should be used as part of an interventional program rather than as a sole intervention&#46;</p><p id="par0435" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Smoking cessation programs&#46;</span> A five-step program for intervention<a class="elsevierStyleCrossRefs" href="#bib1425"><span class="elsevierStyleSup">86&#44;87</span></a> provides a framework to guide healthcare providers to help patients stop smoking&#46;<a class="elsevierStyleCrossRefs" href="#bib1380"><span class="elsevierStyleSup">77&#44;86&#44;88</span></a> Counseling delivered by health professionals significantly increases quit rates over self-initiated strategies&#46;<a class="elsevierStyleCrossRef" href="#bib1440"><span class="elsevierStyleSup">89</span></a> The combination of pharmacotherapy and behavioral support increases smoking cessation rates&#46;<a class="elsevierStyleCrossRef" href="#bib1445"><span class="elsevierStyleSup">90</span></a></p></span><span id="sec0110" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Vaccinations</span><span id="sec0115" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0135">Influenza vaccine and Pneumococcal vaccines</span><p id="par0440" class="elsevierStylePara elsevierViewall">Influenza vaccination reduces serious illness&#44;<a class="elsevierStyleCrossRef" href="#bib1450"><span class="elsevierStyleSup">91</span></a> death&#44;<a class="elsevierStyleCrossRefs" href="#bib1455"><span class="elsevierStyleSup">92&#8211;95</span></a> the risk of ischemic heart disease<a class="elsevierStyleCrossRef" href="#bib1475"><span class="elsevierStyleSup">96</span></a> and the total number of exacerbations&#46;<a class="elsevierStyleCrossRef" href="#bib1455"><span class="elsevierStyleSup">92</span></a> Vaccines containing either killed or live inactivated viruses are recommended<a class="elsevierStyleCrossRef" href="#bib1480"><span class="elsevierStyleSup">97</span></a> as they are more effective in elderly patients with COPD&#46;<a class="elsevierStyleCrossRef" href="#bib1485"><span class="elsevierStyleSup">98</span></a></p><p id="par0445" class="elsevierStylePara elsevierViewall">Pneumococcal vaccinations&#44; PCV13 and PPSV23&#44; are recommended for all patients &#8805; 65 years of age &#40;see Table S2 in the Supplementary Appendix&#41;&#46;</p></span></span><span id="sec0120" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0140">Pharmacologic Therapy for Stable COPD</span><span id="sec0125" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0145">Overview of medications</span><p id="par0450" class="elsevierStylePara elsevierViewall">Pharmacologic therapy for COPD reduces symptoms&#44; the frequency and severity of exacerbations&#44; and improves exercise tolerance and health status&#46; No existing medication modifies the long-term decline in lung function&#46;<a class="elsevierStyleCrossRefs" href="#bib1490"><span class="elsevierStyleSup">99&#8211;103</span></a> The classes of medications used to treat COPD are shown in Table S3 of the Supplementary Appendix&#46; The choice within each class depends on the availability and cost of medication and favorable clinical response balanced against side effects&#46; Each treatment regimen needs to be individualized as the relationship between severity of symptoms&#44; airflow limitation&#44; and severity of exacerbations varies between patients&#46;</p></span><span id="sec0130" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0150">Bronchodilators</span><p id="par0455" class="elsevierStylePara elsevierViewall">Bronchodilators increase FEV<span class="elsevierStyleInf">1</span>&#44; reduce dynamic hyperinflation&#44; at rest and during exercise&#44;<a class="elsevierStyleCrossRefs" href="#bib1515"><span class="elsevierStyleSup">104&#44;105</span></a> and improve exercise performance&#46; Bronchodilator medications are usually given on a regular basis to prevent or reduce symptoms&#46; Toxicity is dose-related&#46;</p><p id="par0460" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Beta</span><span class="elsevierStyleInf"><span class="elsevierStyleBold">2</span></span><span class="elsevierStyleBold">-agonists</span>&#46; Beta<span class="elsevierStyleInf">2</span>-agonists&#44; including short-acting &#40;SABA&#41; and long-acting &#40;LABA&#41; agents&#44; relax airway smooth muscle&#46; Stimulation of beta<span class="elsevierStyleInf">2</span>-adrenergic receptors can produce resting sinus tachycardia and precipitate cardiac rhythm disturbances in susceptible patients&#46; Exaggerated somatic tremor occurs in some patients treated with higher doses of beta<span class="elsevierStyleInf">2</span>-agonists&#46;</p><p id="par0465" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Antimuscarinic drugs&#46;</span> Ipratropium&#44; a short acting muscarinic antagonist&#44; provides small benefits over short-acting beta<span class="elsevierStyleInf">2</span>-agonist in terms of lung function&#44; health status and requirement for oral steroids&#46;<a class="elsevierStyleCrossRef" href="#bib1525"><span class="elsevierStyleSup">106</span></a> Long acting muscarinic antagonist &#40;LAMA&#41; treatment improves symptoms and health status&#44;<a class="elsevierStyleCrossRefs" href="#bib1530"><span class="elsevierStyleSup">107&#44;108</span></a> improves the effectiveness of pulmonary rehabilitation<a class="elsevierStyleCrossRefs" href="#bib1540"><span class="elsevierStyleSup">109&#44;110</span></a> and reduces exacerbations and related hospitalizations&#46;<a class="elsevierStyleCrossRef" href="#bib1530"><span class="elsevierStyleSup">107</span></a> Clinical trials have shown a greater effect on exacerbation rates for LAMA treatment &#40;tiotropium&#41; versus LABA treatment&#46;<a class="elsevierStyleCrossRefs" href="#bib1550"><span class="elsevierStyleSup">111&#44;112</span></a> An unexpected small increase in cardiovascular events was reported in COPD patients regularly treated with ipratropium bromide&#46;<a class="elsevierStyleCrossRefs" href="#bib1560"><span class="elsevierStyleSup">113&#44;114</span></a> A large trial reported no difference in mortality&#44; cardiovascular morbidity or exacerbation rates when using tiotropium as a dry-powder inhaler compared to a mist delivered by the Respimat<span class="elsevierStyleSup">&#174;</span> inhaler&#46;<a class="elsevierStyleCrossRef" href="#bib1570"><span class="elsevierStyleSup">115</span></a></p><p id="par0470" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Methylxanthines&#46;</span> Theophylline exerts a modest bronchodilator effect in stable COPD&#44;<a class="elsevierStyleCrossRef" href="#bib1575"><span class="elsevierStyleSup">116</span></a> and improves FEV<span class="elsevierStyleInf">1</span> and breathlessness when added to salmeterol&#46;<a class="elsevierStyleCrossRefs" href="#bib1580"><span class="elsevierStyleSup">117&#44;118</span></a> There is limited and contradictory evidence regarding the effect of low-dose theophylline on exacerbation rates&#46;<a class="elsevierStyleCrossRefs" href="#bib1590"><span class="elsevierStyleSup">119&#44;120</span></a> Toxicity is dose-related&#44; which is a problem as most of the benefit occurs when near-toxic doses are given&#46;<a class="elsevierStyleCrossRefs" href="#bib1575"><span class="elsevierStyleSup">116&#44;121</span></a></p></span><span id="sec0135" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0155">Combination bronchodilator therapy</span><p id="par0475" class="elsevierStylePara elsevierViewall">Combining bronchodilators with different mechanisms and durations of action may increase the degree of bronchodilation with a lower risk of side-effects compared to increasing the dose of a single bronchodilator &#40;<a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a>&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib1605"><span class="elsevierStyleSup">122</span></a> There are numerous combinations of a LABA and LAMA in a <span class="elsevierStyleItalic">single inhaler</span> available &#40;Table S3&#41;&#46; These combinations improve lung function compared to placebo<a class="elsevierStyleCrossRef" href="#bib1605"><span class="elsevierStyleSup">122</span></a> and have a greater impact on patient reported outcomes compared to monotherapies&#46;<a class="elsevierStyleCrossRefs" href="#bib1610"><span class="elsevierStyleSup">123&#8211;126</span></a> LABA&#47;LAMA improves symptoms and health status in COPD patients&#44;<a class="elsevierStyleCrossRef" href="#bib1630"><span class="elsevierStyleSup">127</span></a> is more effective than long-acting bronchodilator monotherapy for preventing exacerbations&#44;<a class="elsevierStyleCrossRef" href="#bib1635"><span class="elsevierStyleSup">128</span></a> and decreases exacerbations to a greater extent than ICS&#47;LABA combination&#46;<a class="elsevierStyleCrossRef" href="#bib1640"><span class="elsevierStyleSup">129</span></a></p><elsevierMultimedia ident="tbl0015"></elsevierMultimedia></span><span id="sec0140" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0160">Anti-inflammatory agents</span><p id="par0480" class="elsevierStylePara elsevierViewall">Exacerbations represent the main clinically relevant end-point used for the efficacy assessment of anti-inflammatory drugs &#40;<a class="elsevierStyleCrossRef" href="#tbl0020">Table 4</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0020"></elsevierMultimedia></span><span id="sec0145" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0165">Inhaled corticosteroids</span><p id="par0485" class="elsevierStylePara elsevierViewall">In patients with moderate to very severe COPD and exacerbations&#44; an inhaled corticosteroid &#40;ICS&#41; combined with a LABA is more effective than either component alone in improving lung function&#44; health status and reducing exacerbations&#46;<a class="elsevierStyleCrossRefs" href="#bib1645"><span class="elsevierStyleSup">130&#44;131</span></a> However&#44; survival is not affected by combination therapy&#46;<a class="elsevierStyleCrossRefs" href="#bib1655"><span class="elsevierStyleSup">132&#44;133</span></a></p><p id="par0490" class="elsevierStylePara elsevierViewall">ICS use has a higher prevalence of oral candidiasis&#44; hoarse voice&#44; skin bruising and pneumonia&#46;<a class="elsevierStyleCrossRef" href="#bib1665"><span class="elsevierStyleSup">134</span></a> Patients at higher risk of pneumonia include those who currently smoke&#44; are aged<span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleUnderline">&#62;</span><span class="elsevierStyleHsp" style=""></span>55 years&#44; have a history of prior exacerbations or pneumonia&#44; a body mass index &#40;BMI&#41;<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>25<span class="elsevierStyleHsp" style=""></span>kg&#47;m<span class="elsevierStyleSup">2</span>&#44; a poor MRC dyspnea grade and&#47;or severe airflow limitation&#46;<a class="elsevierStyleCrossRef" href="#bib1670"><span class="elsevierStyleSup">135</span></a></p><p id="par0495" class="elsevierStylePara elsevierViewall">Results from RCTs have yielded variable results regarding the risk of decreased bone density and fractures with ICS treatment&#46;<a class="elsevierStyleCrossRefs" href="#bib1500"><span class="elsevierStyleSup">101&#44;136&#8211;139</span></a> Observational studies suggest that ICS treatment could be associated with increased risks of diabetes&#47;poor control of diabetes&#44;<a class="elsevierStyleCrossRef" href="#bib1695"><span class="elsevierStyleSup">140</span></a> cataracts&#44;<a class="elsevierStyleCrossRef" href="#bib1700"><span class="elsevierStyleSup">141</span></a> and mycobacterial infection<a class="elsevierStyleCrossRef" href="#bib1705"><span class="elsevierStyleSup">142</span></a> including tuberculosis&#46;<a class="elsevierStyleCrossRefs" href="#bib1710"><span class="elsevierStyleSup">143&#44;144</span></a></p><p id="par0500" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">ICS withdrawal</span>&#46; Withdrawal studies provide equivocal results regarding the consequences of withdrawal on lung function&#44; symptoms and exacerbations&#46;<a class="elsevierStyleCrossRefs" href="#bib1720"><span class="elsevierStyleSup">145&#8211;149</span></a></p></span><span id="sec0150" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0170">Triple inhaled therapy</span><p id="par0505" class="elsevierStylePara elsevierViewall">Combination of LABA plus LAMA plus ICS &#40;triple therapy&#41; may improve lung function and patient reported outcomes&#46;<a class="elsevierStyleCrossRefs" href="#bib1745"><span class="elsevierStyleSup">150&#8211;153</span></a> and reduce exacerbation risk&#46;<a class="elsevierStyleCrossRefs" href="#bib1750"><span class="elsevierStyleSup">151&#44;154&#8211;156</span></a> However&#44; one RCT failed to demonstrate any benefit of adding an ICS to LABA plus LAMA on exacerbations&#46;<a class="elsevierStyleCrossRef" href="#bib1780"><span class="elsevierStyleSup">157</span></a> More evidence is needed to compare the benefits of triple therapy &#40;LABA&#47;LAMA&#47;ICS&#41; to LABA&#47;LAMA&#46;</p></span><span id="sec0155" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0175">Oral glucocorticoids</span><p id="par0510" class="elsevierStylePara elsevierViewall">Oral glucocorticoids have no role in the chronic daily treatment in COPD because of a lack of benefit balanced against a high rate of systemic complications&#46;</p></span><span id="sec0160" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0180">Phosphodiesterase-4 inhibitors</span><p id="par0515" class="elsevierStylePara elsevierViewall">Roflumilast reduces moderate and severe exacerbations treated with systemic corticosteroids in patients with chronic bronchitis&#44; severe to very severe COPD&#44; and a history of exacerbations&#46;<a class="elsevierStyleCrossRef" href="#bib1785"><span class="elsevierStyleSup">158</span></a> Phosphodiesterase-4 &#40;PDE4&#41; inhibitors have more adverse effects than inhaled medications for COPD&#46;<a class="elsevierStyleCrossRef" href="#bib1790"><span class="elsevierStyleSup">159</span></a> The most frequent are diarrhea&#44; nausea&#44; reduced appetite&#44; weight loss&#44; abdominal pain&#44; sleep disturbance&#44; and headache&#46; Roflumilast should be avoided in underweight patients and used with caution in patients with depression&#46;</p></span><span id="sec0165" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0185">Antibiotics</span><p id="par0520" class="elsevierStylePara elsevierViewall">Azithromycin &#40;250<span class="elsevierStyleHsp" style=""></span>mg&#47;day or 500<span class="elsevierStyleHsp" style=""></span>mg three times per week&#41; or erythromycin &#40;500<span class="elsevierStyleHsp" style=""></span>mg two times per day&#41; for one year reduces the risk of exacerbations in patients prone to exacerbations&#46;<a class="elsevierStyleCrossRefs" href="#bib1795"><span class="elsevierStyleSup">160&#8211;162</span></a> Azithromycin use showed a reduced exacerbation rate in former smokers only and was associated with an increased incidence of bacterial resistance and impaired hearing tests&#46;<a class="elsevierStyleCrossRef" href="#bib1805"><span class="elsevierStyleSup">162</span></a> Pulse moxifloxacin therapy in patients with chronic bronchitis and frequent exacerbations does not reduce exacerbation rate&#46;<a class="elsevierStyleCrossRef" href="#bib1810"><span class="elsevierStyleSup">163</span></a></p></span><span id="sec0170" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0190">Mucolytic &#40;mucokinetics&#44; mucoregulators&#41; and antioxidant agents &#40;N-acetylcysteine&#44; carbocysteine&#41;</span><p id="par0525" class="elsevierStylePara elsevierViewall">Regular treatment with mucolytics such as carbocysteine and N-acetylcysteine may reduce exacerbations and modestly improve health status in patients not receiving ICS&#46;<a class="elsevierStyleCrossRefs" href="#bib1815"><span class="elsevierStyleSup">164&#44;165</span></a></p></span><span id="sec0175" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0195">Other drugs with anti-inflammatory potential</span><p id="par0530" class="elsevierStylePara elsevierViewall">Although RCTs suggest that immunoregulators decrease the severity and frequency of exacerbations&#44;<a class="elsevierStyleCrossRefs" href="#bib1825"><span class="elsevierStyleSup">166&#44;167</span></a> the long-term effects of this therapy are unknown&#46; Nedocromil and leukotriene modifiers have not been adequately tested in COPD&#46;<a class="elsevierStyleCrossRef" href="#bib1835"><span class="elsevierStyleSup">168</span></a> There was no evidence of benefit&#44; and some evidence of harm&#44; following treatment with an anti-TNF-alpha antibody &#40;infliximab&#41; in moderate to severe COPD&#46;<a class="elsevierStyleCrossRef" href="#bib1840"><span class="elsevierStyleSup">169</span></a> Simvastatin did not prevent exacerbations in patients with COPD who had no metabolic or cardiovascular indication for statin treatment&#46;<a class="elsevierStyleCrossRef" href="#bib1845"><span class="elsevierStyleSup">170</span></a> An association between statin use and improved outcomes has been reported in observational studies of patients with COPD who received them for cardiovascular and metabolic indications&#46;<a class="elsevierStyleCrossRef" href="#bib1850"><span class="elsevierStyleSup">171</span></a> There is no evidence that vitamin D supplementation reduces exacerbations in unselected patients&#46;<a class="elsevierStyleCrossRef" href="#bib1855"><span class="elsevierStyleSup">172</span></a></p></span><span id="sec0180" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0200">Issues related to inhaled delivery</span><p id="par0535" class="elsevierStylePara elsevierViewall">Observational studies have identified a significant relationship between poor inhaler use and symptom control in COPD&#46;<a class="elsevierStyleCrossRef" href="#bib1860"><span class="elsevierStyleSup">173</span></a> Determinants of poor inhaler technique include older age&#44; use of multiple devices&#44; and lack of previous education on inhaler technique&#46;<a class="elsevierStyleCrossRef" href="#bib1865"><span class="elsevierStyleSup">174</span></a> Education improves inhalation technique in some but not all patients&#44;<a class="elsevierStyleCrossRef" href="#bib1865"><span class="elsevierStyleSup">174</span></a> especially when the &#8220;teach-back&#8221; approach is implemented&#46;<a class="elsevierStyleCrossRef" href="#bib1870"><span class="elsevierStyleSup">175</span></a></p><p id="par0540" class="elsevierStylePara elsevierViewall">Other pharmacologic treatments for COPD are summarized in Table S4 in the Supplementary Appendix&#46;</p><p id="par0545" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Alpha-1 antitrypsin augmentation therapy</span>&#46; Observational studies suggest a reduction in spirometric progression in alpha-1 antitrypsin deficiency patients treated with augmentation therapy versus non-treated patients&#46;<a class="elsevierStyleCrossRef" href="#bib1875"><span class="elsevierStyleSup">176</span></a> Studies using sensitive parameters of emphysema progression determined by CT scans provide evidence for an effect on preserving lung tissue compared to placebo&#46;<a class="elsevierStyleCrossRefs" href="#bib1880"><span class="elsevierStyleSup">177&#8211;179</span></a></p><p id="par0550" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Antitussives</span>&#46; The role of antitussives in patients with COPD is inconclusive&#46;<a class="elsevierStyleCrossRef" href="#bib1895"><span class="elsevierStyleSup">180</span></a></p><p id="par0555" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Vasodilators</span>&#46; Available studies report worsening gas exchange<a class="elsevierStyleCrossRef" href="#bib1900"><span class="elsevierStyleSup">181</span></a> with little improvement in exercise capacity or health status in COPD patients&#46;<a class="elsevierStyleCrossRefs" href="#bib1905"><span class="elsevierStyleSup">182&#44;183</span></a></p></span></span><span id="sec0185" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0205">Rehabilitation&#44; Education&#44; and Self-Management</span><span id="sec0190" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0210">Pulmonary Rehabilitation</span><p id="par0560" class="elsevierStylePara elsevierViewall">Pulmonary rehabilitation is a comprehensive intervention based on thorough patient assessment followed by patient-tailored therapies &#40;e&#46;g&#46;&#44; exercise training&#44; education&#44; self-management interventions aimed at behavior changes to improve physical and psychological condition and promote adherence to health-enhancing behaviors in patients with COPD&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib1915"><span class="elsevierStyleSup">184</span></a> The benefits of pulmonary rehabilitation are considerable &#40;Table S5 in the Supplementary Appendix&#41;&#46; Pulmonary rehabilitation can reduce readmissions and mortality in patients following a recent exacerbation &#40;&#8804; 4 weeks from prior hospitalization&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib1920"><span class="elsevierStyleSup">185</span></a> Initiating pulmonary rehabilitation before hospital discharge&#44; however&#44; may compromise survival&#46;<a class="elsevierStyleCrossRef" href="#bib1925"><span class="elsevierStyleSup">186</span></a></p><p id="par0565" class="elsevierStylePara elsevierViewall">Pulmonary rehabilitation represents integrated patient management that includes a range of healthcare professionals<a class="elsevierStyleCrossRef" href="#bib1930"><span class="elsevierStyleSup">187</span></a> and sites&#44; including hospital inpatient and outpatient settings and&#47;or the patient&#39;s home&#46;<a class="elsevierStyleCrossRef" href="#bib1915"><span class="elsevierStyleSup">184</span></a></p></span><span id="sec0195" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0215">Education&#44; Self-Management&#44; and Integrative Care</span><p id="par0570" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Education</span>&#46; Smoking cessation&#44; correct use of inhaler devices&#44; early recognition of exacerbation&#44; decision making&#44; when to seek help&#44; surgical interventions&#44; and the consideration of advance directives&#44; are examples of educational topics&#46;</p><p id="par0575" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Self-management</span>&#46; Self-management interventions that use written negotiated action plans for worsening symptoms may lead to less respiratory-related hospitalization and all cause hospitalizations and improved health status&#46;<a class="elsevierStyleCrossRef" href="#bib1935"><span class="elsevierStyleSup">188</span></a> The health benefits of COPD self-management programs may be negated by increased mortality&#46;<a class="elsevierStyleCrossRefs" href="#bib1940"><span class="elsevierStyleSup">189&#44;190</span></a> Generalization to real life remains difficult&#46;</p><p id="par0580" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Integrated care programs</span>&#46; Integrated care programs improve several clinical outcomes&#44; although not mortality&#46;<a class="elsevierStyleCrossRef" href="#bib1950"><span class="elsevierStyleSup">191</span></a> However&#44; a large multi-center study within an existing well-organized system of care did not confirm this&#46;<a class="elsevierStyleCrossRef" href="#bib1955"><span class="elsevierStyleSup">192</span></a> Delivering integrated interventions by telemedicine provided no significant benefit&#46;<a class="elsevierStyleCrossRef" href="#bib1960"><span class="elsevierStyleSup">193</span></a></p></span></span><span id="sec0200" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0220">Supportive&#44; Palliative&#44; End-of-Life&#44; and Hospice Care</span><span id="sec0205" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0225">Symptom Control and Palliative Care</span><p id="par0585" class="elsevierStylePara elsevierViewall">The goal of palliative care is to prevent and relieve suffering&#44; and to improve quality of life for patients and their families&#44; regardless of the stage of disease or the need for other therapies&#46;<a class="elsevierStyleCrossRef" href="#bib1965"><span class="elsevierStyleSup">194</span></a> Palliation efforts should be focused on the relief of dyspnea&#44; pain&#44; anxiety&#44; depression&#44; fatigue&#44; and poor nutrition&#46;</p></span><span id="sec0210" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0230">End-of-Life and Hospice Care</span><p id="par0590" class="elsevierStylePara elsevierViewall">End of life care discussions should include patients and their families&#46;<a class="elsevierStyleCrossRef" href="#bib1970"><span class="elsevierStyleSup">195</span></a> Advance care planning can reduce anxiety for patients and their families&#44; ensure that care is consistent with their wishes and avoid unnecessary&#44; unwanted and costly invasive therapies<a class="elsevierStyleCrossRefs" href="#bib1975"><span class="elsevierStyleSup">196&#44;197</span></a> Table S6 in the Supplementary Appendix summarizes the approach to palliation&#44; end-of-life and hospice care</p></span></span><span id="sec0215" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0235">Other Treatments</span><span id="sec0220" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0240">Oxygen Therapy and Ventilatory Support</span><p id="par0595" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Oxygen therapy</span>&#46; The long-term administration of oxygen &#40;&#62; 15<span class="elsevierStyleHsp" style=""></span>hours per day&#41; to patients with chronic respiratory failure increases survival in patients with severe resting hypoxemia&#46;<a class="elsevierStyleCrossRef" href="#bib1985"><span class="elsevierStyleSup">198</span></a> Long term oxygen therapy does not lengthen time to death or first hospitalization or provide sustained benefit for any of the measured outcomes in patients with stable COPD and resting or exercise-induced moderate arterial oxygen desaturation&#46;<a class="elsevierStyleCrossRef" href="#bib1990"><span class="elsevierStyleSup">199</span></a></p><p id="par0600" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Ventilatory support&#46;</span> Whether to use NPPV chronically at home to treat patients with acute on chronic respiratory failure following hospitalization remains undetermined&#46; Retrospective studies have provided inconclusive data&#46;<a class="elsevierStyleCrossRefs" href="#bib1995"><span class="elsevierStyleSup">200&#44;201</span></a> RCTs have yielded conflicting data on the use of home NPPV on survival and re-hospitalization in chronic hypercapnic COPD&#46;<a class="elsevierStyleCrossRefs" href="#bib2005"><span class="elsevierStyleSup">202&#8211;205</span></a> In patients with both COPD and obstructive sleep apnea continuous positive airway pressure improves survival and avoids hospitalization &#40;Table S7 in the Supplementary Appendix&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib2025"><span class="elsevierStyleSup">206</span></a></p></span></span><span id="sec0225" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0245">Interventional Therapy</span><span id="sec0230" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0250">Surgical Interventions</span><p id="par0605" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Lung volume reduction surgery</span>&#46; A RCT confirmed that COPD patients with upper-lobe emphysema and low post-rehabilitation exercise capacity experienced improved survival when treated with lung volume reduction surgery &#40;LVRS&#41; compared to medical treatment&#46;<a class="elsevierStyleCrossRef" href="#bib2030"><span class="elsevierStyleSup">207</span></a> In patients with high post-pulmonary rehabilitation exercise capacity&#44; no difference in survival was noted after LVRS&#44; although health status and exercise capacity improved&#46; LVRS has been demonstrated to result in higher mortality than medical management in severe emphysema patients with an FEV<span class="elsevierStyleInf">1</span> &#8804; 20&#37; predicted and either homogeneous emphysema in high resolution computed tomography or a DLCO of &#8804; 20&#37; of predicted&#46;<a class="elsevierStyleCrossRef" href="#bib2035"><span class="elsevierStyleSup">208</span></a></p><p id="par0610" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Bullectomy</span>&#46; In selected patients with relatively preserved underlying lung&#44; bullectomy is associated with decreased dyspnea&#44; improved lung function and exercise tolerance&#46;<a class="elsevierStyleCrossRef" href="#bib2040"><span class="elsevierStyleSup">209</span></a></p><p id="par0615" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Lung transplantation</span>&#46; In selected patients lung transplantation has been shown to improve health status and functional capacity but not to prolong survival&#46;<a class="elsevierStyleCrossRefs" href="#bib2040"><span class="elsevierStyleSup">209&#8211;211</span></a> Bilateral lung transplantation has been reported to have longer survival than single lung transplantation in COPD patients&#44; especially those<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>60 years of age&#46;<a class="elsevierStyleCrossRef" href="#bib2055"><span class="elsevierStyleSup">212</span></a></p></span><span id="sec0235" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0255">Bronchoscopic Interventions to Reduce Hyperinflation in Severe Emphysema</span><p id="par0620" class="elsevierStylePara elsevierViewall">Less invasive bronchoscopic approaches to lung reduction have been developed&#46;<a class="elsevierStyleCrossRef" href="#bib2060"><span class="elsevierStyleSup">213</span></a> Prospective studies have shown that the use of bronchial stents is not effective<a class="elsevierStyleCrossRef" href="#bib2065"><span class="elsevierStyleSup">214</span></a> while use of lung sealant caused significant morbidity and mortality&#46;<a class="elsevierStyleCrossRef" href="#bib2070"><span class="elsevierStyleSup">215</span></a> A RCT of endobronchial valve placement showed statistically significant improvements in FEV<span class="elsevierStyleInf">1</span> and 6-minute walk distance compared to control therapy at 6 months post intervention<a class="elsevierStyleCrossRef" href="#bib2075"><span class="elsevierStyleSup">216</span></a> but the magnitude of the observed improvements was not clinically meaningful&#46; Subsequently&#44; efficacy of the same endobronchial valve has been studied in patients with heterogeneous&#44;<a class="elsevierStyleCrossRef" href="#bib2080"><span class="elsevierStyleSup">217</span></a> or heterogeneous and homogenous emphysema<a class="elsevierStyleCrossRef" href="#bib2085"><span class="elsevierStyleSup">218</span></a> with mixed outcomes&#46;</p><p id="par0625" class="elsevierStylePara elsevierViewall">Two multicenter trials have examined nitinol coils implanted into the lung compared to usual care reported increases in 6<span class="elsevierStyleHsp" style=""></span>minute walk distance with coil treatment compared to control and smaller improvements in FEV<span class="elsevierStyleInf">1</span> and quality of life measured by St George&#39;s Respiratory Questionnaire&#46;<a class="elsevierStyleCrossRefs" href="#bib2090"><span class="elsevierStyleSup">219&#44;220</span></a></p><p id="par0630" class="elsevierStylePara elsevierViewall">Additional data are needed to define the optimal patient population to receive a specific bronchoscopic lung volume technique and to compare the long-term durability of improvements in functional or physiological performance to LVRS relative to side effects&#46;<a class="elsevierStyleCrossRef" href="#bib2095"><span class="elsevierStyleSup">220</span></a></p><p id="par0635" class="elsevierStylePara elsevierViewall">Key points for interventional therapy in stable COPD are summarized in Table S8 in the Supplementary Appendix&#46;</p></span></span><span id="sec0240" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0260">Management of Stable COPD</span><p id="par0640" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Key Points</span><ul class="elsevierStyleList" id="lis0030"><li class="elsevierStyleListItem" id="lsti0175"><span class="elsevierStyleLabel">&#8226;</span><p id="par0645" class="elsevierStylePara elsevierViewall">The management strategy for stable COPD should be based on individualized symptom assessment and future risk of exacerbations&#46;</p></li><li class="elsevierStyleListItem" id="lsti0180"><span class="elsevierStyleLabel">&#8226;</span><p id="par0650" class="elsevierStylePara elsevierViewall">All individuals who smoke should be supported to quit&#46;</p></li><li class="elsevierStyleListItem" id="lsti0185"><span class="elsevierStyleLabel">&#8226;</span><p id="par0655" class="elsevierStylePara elsevierViewall">The main treatment goals are reduction of symptoms and future risk of exacerbations&#46;</p></li><li class="elsevierStyleListItem" id="lsti0190"><span class="elsevierStyleLabel">&#8226;</span><p id="par0660" class="elsevierStylePara elsevierViewall">Management strategies are not limited to pharmacologic treatments&#44; and should be complemented by appropriate non-pharmacologic interventions&#46;</p></li></ul></p><p id="par0665" class="elsevierStylePara elsevierViewall">Effective COPD management should be based on an individualized assessment to reduce both current symptoms and future risks of exacerbations &#40;Figure S1 in the Supplementary Appendix&#41;&#46;</p><p id="par0670" class="elsevierStylePara elsevierViewall">We propose personalization of initiating and escalating&#47;de-escalating treatments based on the level of symptoms and an individual&#39;s risk of exacerbations&#46; The basis for these recommendations is partially based on evidence generated in RCTs&#46; These recommendations are intended to support clinician decision-making&#46;</p></span><span id="sec0245" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0265">Identify and Reduce Exposure to Risk Factors</span><p id="par0675" class="elsevierStylePara elsevierViewall">Cigarette smoking is the most commonly encountered and easily identifiable risk factor for COPD&#59; smoking cessation should be continually encouraged for current smokers&#46; Reduction of total personal exposure to occupational dusts&#44; fumes&#44; and gases&#44; and to indoor and outdoor air pollutants&#44; should be addressed&#46;</p></span><span id="sec0250" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0270">Treatment of Stable COPD</span><span id="sec0255" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0275">Pharmacologic Treatment</span><p id="par0680" class="elsevierStylePara elsevierViewall">Pharmacologic therapies can reduce symptoms&#44; the risk and severity of exacerbations&#44; and improve health status and exercise tolerance&#46; The choice within each class depends on the availability of medication and the patient&#39;s response and preference &#40;<a class="elsevierStyleCrossRefs" href="#tbl0025">Tables 5&#8211;7</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0025"></elsevierMultimedia><elsevierMultimedia ident="tbl0030"></elsevierMultimedia><elsevierMultimedia ident="tbl0035"></elsevierMultimedia></span><span id="sec0260" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0280">Pharmacologic treatment algorithms</span><p id="par0685" class="elsevierStylePara elsevierViewall">A proposed model for the initiation&#44; and then subsequent escalation and&#47;or de-escalation of pharmacologic management according to the individualized assessment of symptoms and exacerbation risk is shown in <a class="elsevierStyleCrossRef" href="#fig0015">Fig&#46; 3</a>&#46; In past GOLD Reports&#44; recommendations were only given for initial therapy&#46; However&#44; many COPD patients are already on treatment and return with persistent symptoms after initial therapy&#44; or less commonly with resolution of some symptoms that may subsequently require less therapy&#46; Therefore&#44; we now suggest escalation and de-escalation strategies&#46; The recommendations are based on available efficacy and safety data&#46; We acknowledge that treatment escalation has not been systematically tested&#59; trials of de-escalation are also limited and only include ICS&#46; There is a lack of direct evidence supporting the therapeutic recommendations for patients in groups C and D&#46; These recommendations will be re-evaluated as additional data become available&#46;</p><elsevierMultimedia ident="fig0015"></elsevierMultimedia><span id="sec0265" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0285">Group A</span><p id="par0690" class="elsevierStylePara elsevierViewall">All Group A patients should be offered a bronchodilator to reduce breathlessness&#46; This can be either a short or a long-acting bronchodilator based on the individual patient&#39;s preference&#46; The bronchodilator should be continued if symptomatic benefit is noted&#46;</p></span><span id="sec0270" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0290">Group B</span><p id="par0695" class="elsevierStylePara elsevierViewall">Initial therapy should be a long acting bronchodilator&#46; Long-acting bronchodilators are superior to short-acting bronchodilators taken intermittently&#46;<a class="elsevierStyleCrossRefs" href="#bib1525"><span class="elsevierStyleSup">106&#44;221</span></a> There is no evidence to recommend one class of long-acting bronchodilators over another for symptom relief&#44; the choice should depend on individual patient response&#46;</p><p id="par0700" class="elsevierStylePara elsevierViewall">For patients with persistent breathlessness on monotherapy<a class="elsevierStyleCrossRef" href="#bib2105"><span class="elsevierStyleSup">222</span></a> the use of two bronchodilators is recommended&#46; For patients with severe breathlessness&#44; initial therapy with two bronchodilators may be considered&#46;</p></span><span id="sec0275" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0295">Group C</span><p id="par0705" class="elsevierStylePara elsevierViewall">Initial therapy should be a single long acting bronchodilator&#46; In two head-to head comparisons<a class="elsevierStyleCrossRefs" href="#bib1555"><span class="elsevierStyleSup">112&#44;223</span></a> the LAMA tested superior to the LABA regarding exacerbation prevention&#44; therefore we recommend initiating a LAMA in this group&#46;</p><p id="par0710" class="elsevierStylePara elsevierViewall">Patients with persistent exacerbations may benefit from adding a second long acting bronchodilator &#40;LABA&#47;LAMA&#41;&#44; or using a combination of a long acting beta<span class="elsevierStyleInf">2</span>-agonist and an inhaled corticosteroid &#40;LABA&#47;ICS&#41;&#46; As ICS increases the risk for developing pneumonia&#44; our primary choice is LABA&#47;LAMA&#46;</p></span><span id="sec0280" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0300">Group D</span><p id="par0715" class="elsevierStylePara elsevierViewall">We recommend initiating a LABA&#47;LAMA combination because&#58;<ul class="elsevierStyleList" id="lis0035"><li class="elsevierStyleListItem" id="lsti0195"><span class="elsevierStyleLabel">&#8226;</span><p id="par0720" class="elsevierStylePara elsevierViewall">In studies with patient reported outcomes as the primary endpoint&#44; LABA&#47;LAMA combinations showed superior results compared to a single bronchodilator&#46;</p></li><li class="elsevierStyleListItem" id="lsti0200"><span class="elsevierStyleLabel">&#8226;</span><p id="par0725" class="elsevierStylePara elsevierViewall">LABA&#47;LAMA combination was superior to LABA&#47;ICS combination in preventing exacerbations and improving other patient reported outcomes in Group D patients&#46;</p></li><li class="elsevierStyleListItem" id="lsti0205"><span class="elsevierStyleLabel">&#8226;</span><p id="par0730" class="elsevierStylePara elsevierViewall">Group D patients are at higher risk for pneumonia when receiving ICS treatment&#46;<a class="elsevierStyleCrossRefs" href="#bib1550"><span class="elsevierStyleSup">111&#44;135</span></a></p></li></ul></p><p id="par0735" class="elsevierStylePara elsevierViewall">If a single bronchodilator is initially chosen&#44; a LAMA is preferred for exacerbation prevention based on comparison to LABAs&#46;</p><p id="par0740" class="elsevierStylePara elsevierViewall">LABA&#47;ICS may be the first choice for initial therapy in some patients&#46; These patients may have a history and&#47;or findings suggestive of asthma-COPD overlap and&#47;or high blood eosinophil counts&#46;</p><p id="par0745" class="elsevierStylePara elsevierViewall">In patients who develop additional exacerbations on LABA&#47;LAMA therapy we suggest two alternative pathways&#58;<ul class="elsevierStyleList" id="lis0040"><li class="elsevierStyleListItem" id="lsti0210"><span class="elsevierStyleLabel">&#8728;</span><p id="par0750" class="elsevierStylePara elsevierViewall">Escalation to LABA&#47;LAMA&#47;ICS&#46;</p></li><li class="elsevierStyleListItem" id="lsti0215"><span class="elsevierStyleLabel">&#8728;</span><p id="par0755" class="elsevierStylePara elsevierViewall">Switch to LABA&#47;ICS&#46; If LABA&#47;ICS therapy does not positively impact exacerbations&#47;symptoms&#44; a LAMA can be added&#46;</p></li></ul></p><p id="par0760" class="elsevierStylePara elsevierViewall">If patients treated with LABA&#47;LAMA&#47;ICS still have exacerbations the following options may be considered&#58;<ul class="elsevierStyleList" id="lis0045"><li class="elsevierStyleListItem" id="lsti0220"><span class="elsevierStyleLabel">&#8728;</span><p id="par0765" class="elsevierStylePara elsevierViewall">Add roflumilast&#46; This may be considered in patients with an FEV<span class="elsevierStyleInf">1</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>50&#37; predicted and chronic bronchitis&#44;<a class="elsevierStyleCrossRef" href="#bib2115"><span class="elsevierStyleSup">224</span></a> particularly if they experienced at least one hospitalization for an exacerbation in the previous year&#46;<a class="elsevierStyleCrossRef" href="#bib2120"><span class="elsevierStyleSup">225</span></a></p></li><li class="elsevierStyleListItem" id="lsti0225"><span class="elsevierStyleLabel">&#8728;</span><p id="par0770" class="elsevierStylePara elsevierViewall">Add a macrolide in former smokers&#46; The possibility of developing resistant organisms should be factored into the decision making&#46;</p></li><li class="elsevierStyleListItem" id="lsti0230"><span class="elsevierStyleLabel">&#8728;</span><p id="par0775" class="elsevierStylePara elsevierViewall">Stopping ICS&#46; This recommendation is supported by data that shows an elevated risk of adverse effects &#40;including pneumonia&#41; and no significant harm from ICS withdrawal&#46;</p></li></ul></p></span></span><span id="sec0285" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0305">Nonpharmacologic Treatment</span><span id="sec0290" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0310">Education and self-management</span><p id="par0780" class="elsevierStylePara elsevierViewall">An individual patient&#39;s evaluation and risk assessment &#40;e&#46;g&#46;&#44; exacerbations&#44; patient&#39;s needs&#44; preferences&#44; and personal goals&#41; should aid the design of personalized self-management&#46;</p></span><span id="sec0295" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0315">Pulmonary rehabilitation programs</span><p id="par0785" class="elsevierStylePara elsevierViewall">Patients with high symptom burden and risk of exacerbations &#40;Groups B&#44; C and D&#41;&#44; should take part in a full rehabilitation program that considers the individual&#39;s characteristics and comorbidities&#46;<a class="elsevierStyleCrossRefs" href="#bib1915"><span class="elsevierStyleSup">184&#44;226&#44;227</span></a></p></span><span id="sec0300" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0320">Exercise training</span><p id="par0790" class="elsevierStylePara elsevierViewall">A combination of constant load or interval training with strength training provides better outcomes than either method alone&#46;<a class="elsevierStyleCrossRef" href="#bib2135"><span class="elsevierStyleSup">228</span></a> Adding strength training to aerobic training is effective in improving strength&#44; but does not improve health status or exercise tolerance&#46;<a class="elsevierStyleCrossRef" href="#bib2140"><span class="elsevierStyleSup">229</span></a> Upper extremity exercise training improves arm strength and endurance and improves capacity for upper extremity activities&#46;<a class="elsevierStyleCrossRef" href="#bib2145"><span class="elsevierStyleSup">230</span></a></p></span><span id="sec0305" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0325">Self-management education</span><p id="par0795" class="elsevierStylePara elsevierViewall">An educational program should include smoking cessation&#59; basic information about COPD&#59; aspects of medical treatment &#40;respiratory medications and inhalation devices&#41;&#59; strategies to minimize dyspnea&#59; advice about when to seek help&#59; and possibly a discussion of advance directives and end-of-life issues&#46;</p></span><span id="sec0310" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0330">End-of-life and palliative care</span><p id="par0800" class="elsevierStylePara elsevierViewall">Patients should be informed that should they become critically ill&#44; they or their family members may need to decide whether a course of intensive care is likely to achieve their personal goals of care&#46; Simple&#44; structured conversations about these possible scenarios should be discussed while patients are in their stable state&#46;<a class="elsevierStyleCrossRef" href="#bib2150"><span class="elsevierStyleSup">231</span></a></p></span></span><span id="sec0315" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0335">Nutritional support</span><p id="par0805" class="elsevierStylePara elsevierViewall">For malnourished patients with COPD nutritional supplementation is recommended&#46;</p></span><span id="sec0320" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0340">Vaccination</span><p id="par0810" class="elsevierStylePara elsevierViewall">Influenza vaccination is recommended for all patients with COPD<span class="elsevierStyleBold">&#46;</span> Pneumococcal vaccinations&#44; PCV13 and PPSV23&#44; are recommended for all patients<span class="elsevierStyleHsp" style=""></span>&#62;<span class="elsevierStyleHsp" style=""></span>65 years of age&#46; The PPSV23 is also recommended for younger COPD patients with significant comorbid conditions including chronic heart or lung disease&#46;<a class="elsevierStyleCrossRef" href="#bib2155"><span class="elsevierStyleSup">232</span></a></p></span><span id="sec0325" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0345">Oxygen therapy</span><p id="par0815" class="elsevierStylePara elsevierViewall">Long-term oxygen therapy is indicated for stable patients who have&#58;<ul class="elsevierStyleList" id="lis0050"><li class="elsevierStyleListItem" id="lsti0235"><span class="elsevierStyleLabel">&#8226;</span><p id="par0820" class="elsevierStylePara elsevierViewall">PaO<span class="elsevierStyleInf">2</span> at or below 7&#46;3<span class="elsevierStyleHsp" style=""></span>kPa &#40;55<span class="elsevierStyleHsp" style=""></span>mmHg&#41; or SaO<span class="elsevierStyleInf">2</span> at or below 88&#37;&#44; with or without hypercapnia confirmed twice over a three-week period&#59; or</p></li><li class="elsevierStyleListItem" id="lsti0240"><span class="elsevierStyleLabel">&#8226;</span><p id="par0825" class="elsevierStylePara elsevierViewall">PaO<span class="elsevierStyleInf">2</span> between 7&#46;3<span class="elsevierStyleHsp" style=""></span>kPa &#40;55<span class="elsevierStyleHsp" style=""></span>mmHg&#41; and 8&#46;0<span class="elsevierStyleHsp" style=""></span>kPa &#40;60<span class="elsevierStyleHsp" style=""></span>mmHg&#41;&#44; or SaO<span class="elsevierStyleInf">2</span> of 88&#37;&#44; if there is evidence of pulmonary hypertension&#44; peripheral edema suggesting congestive cardiac failure&#44; or polycythemia &#40;hematocrit<span class="elsevierStyleHsp" style=""></span>&#62;<span class="elsevierStyleHsp" style=""></span>55&#37;&#41;&#46;</p></li></ul></p></span><span id="sec0330" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0350">Ventilatory support</span><p id="par0830" class="elsevierStylePara elsevierViewall">NIV is occasionally used in patients with stable very severe COPD&#46; NIV may be considered in a selected group of patients&#44; particularly those with pronounced daytime hypercapnia and recent hospitalization&#44; although contradictory evidence exists regarding its effectiveness&#46;<a class="elsevierStyleCrossRef" href="#bib2160"><span class="elsevierStyleSup">233</span></a> In patients with both COPD and obstructive sleep apnea continuous positive airway pressure is indicated&#46;<a class="elsevierStyleCrossRef" href="#bib2025"><span class="elsevierStyleSup">206</span></a></p></span><span id="sec0335" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0355">Interventional bronchoscopy and surgery</span><p id="par0835" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0055"><li class="elsevierStyleListItem" id="lsti0245"><span class="elsevierStyleLabel">&#8226;</span><p id="par0840" class="elsevierStylePara elsevierViewall">In selected patients with heterogeneous or homogenous emphysema and significant hyperinflation refractory to optimized medical care&#44; surgical or bronchoscopic modes of lung volume reduction &#40;e&#46;g&#46;&#44; endobronchial one-way valves or lung coils&#41; may be considered&#46;<a class="elsevierStyleCrossRef" href="#bib2165"><span class="elsevierStyleSup">234</span></a></p></li><li class="elsevierStyleListItem" id="lsti0250"><span class="elsevierStyleLabel">&#8226;</span><p id="par0845" class="elsevierStylePara elsevierViewall">In selected patients with a large bulla&#44; surgical bullectomy may be considered&#46;</p></li><li class="elsevierStyleListItem" id="lsti0255"><span class="elsevierStyleLabel">&#8226;</span><p id="par0850" class="elsevierStylePara elsevierViewall">In selected patients with very severe COPD and without relevant contraindications&#44; lung transplantation may be considered&#46;</p></li></ul></p><p id="par0855" class="elsevierStylePara elsevierViewall">Choosing bronchoscopic lung reduction or LVRS to treat hyperinflation in an emphysematous patient depends on a number of factors that include&#58; the extent and pattern of emphysema identified on HRCT&#59; the presence of interlobar collateral ventilation measured by fissure integrity on HRCT or physiological assessment &#40;endoscopic balloon occlusion and flow assessment&#41;&#59; local proficiency in the performance of the procedures&#59; and patient and provider preferences&#46; An algorithm depicting the various interventions based on radiological and physiological features is shown in <a class="elsevierStyleCrossRef" href="#fig0020">Fig&#46; 4</a>&#46;</p><elsevierMultimedia ident="fig0020"></elsevierMultimedia><p id="par0860" class="elsevierStylePara elsevierViewall">Criteria for referral for lung transplantation include COPD with progressive disease&#44; not a candidate for endoscopic or surgical lung volume reduction&#44; BODE index of 5 to 6&#44; Pco<span class="elsevierStyleInf">2</span><span class="elsevierStyleHsp" style=""></span>&#62;<span class="elsevierStyleHsp" style=""></span>50<span class="elsevierStyleHsp" style=""></span>mmHg or 6&#46;6<span class="elsevierStyleHsp" style=""></span>kPa and&#47;or Pa<span class="elsevierStyleSmallCaps">o</span><span class="elsevierStyleInf">2</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>60<span class="elsevierStyleHsp" style=""></span>mmHg or 8<span class="elsevierStyleHsp" style=""></span>kPa&#44; and FEV<span class="elsevierStyleInf">1</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>25&#37; predicted&#46;<a class="elsevierStyleCrossRef" href="#bib2170"><span class="elsevierStyleSup">235</span></a> Recommended criteria for listing include one of the following&#58; BODE index<span class="elsevierStyleHsp" style=""></span>&#62;<span class="elsevierStyleHsp" style=""></span>7&#44; FEV<span class="elsevierStyleInf">1</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>15-20&#37; predicted&#44; three or more severe exacerbations during the preceding year&#44; one severe exacerbation with acute hypercapnic respiratory failure&#44; or moderate to severe pulmonary hypertension&#46;<a class="elsevierStyleCrossRefs" href="#bib2170"><span class="elsevierStyleSup">235&#44;236</span></a></p><p id="par0865" class="elsevierStylePara elsevierViewall">Key points for the use of non-pharmacologic treatments are summarized in Table S9 in the Supplementary Appendix&#46;</p></span></span><span id="sec0340" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0360">Monitoring and Follow-Up</span><p id="par0870" class="elsevierStylePara elsevierViewall">Routine follow-up of COPD patients is essential&#46; Symptoms&#44; exacerbations and objective measures of airflow limitation should be monitored to determine when to modify management and to identify any complications and&#47;or comorbidities that may develop&#46; In order to adjust therapy appropriately as the disease progresses&#44; each follow-up visit should include a discussion of the current therapeutic regimen&#46; Symptoms that indicate worsening or development of another comorbid condition should be evaluated and treated&#46;</p><span id="sec0345" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0365">Management of Exacerbations</span><p id="par0875" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Key Points</span><ul class="elsevierStyleList" id="lis0060"><li class="elsevierStyleListItem" id="lsti0260"><span class="elsevierStyleLabel"><span class="elsevierStyleBold">&#8226;</span></span><p id="par0880" class="elsevierStylePara elsevierViewall">An exacerbation of COPD is an acute worsening of respiratory symptoms that results in additional therapy&#46;</p></li><li class="elsevierStyleListItem" id="lsti0265"><span class="elsevierStyleLabel"><span class="elsevierStyleBold">&#8226;</span></span><p id="par0885" class="elsevierStylePara elsevierViewall">Exacerbations can be precipitated by several factors&#46; The most common causes are respiratory tract infections&#46;</p></li><li class="elsevierStyleListItem" id="lsti0270"><span class="elsevierStyleLabel"><span class="elsevierStyleBold">&#8226;</span></span><p id="par0890" class="elsevierStylePara elsevierViewall">The goal for treatment of exacerbations is to minimize the negative impact of the current exacerbation and to prevent subsequent events&#46;</p></li><li class="elsevierStyleListItem" id="lsti0275"><span class="elsevierStyleLabel"><span class="elsevierStyleBold">&#8226;</span></span><p id="par0895" class="elsevierStylePara elsevierViewall">Short-acting inhaled beta<span class="elsevierStyleInf">2</span>-agonists&#44; with or without short-acting anticholinergics&#44; are recommended as the initial bronchodilators to treat an acute exacerbation&#46;</p></li><li class="elsevierStyleListItem" id="lsti0280"><span class="elsevierStyleLabel"><span class="elsevierStyleBold">&#8226;</span></span><p id="par0900" class="elsevierStylePara elsevierViewall">Maintenance therapy with long-acting bronchodilators should be initiated as soon as possible before hospital discharge&#46;</p></li><li class="elsevierStyleListItem" id="lsti0285"><span class="elsevierStyleLabel"><span class="elsevierStyleBold">&#8226;</span></span><p id="par0905" class="elsevierStylePara elsevierViewall">Systemic corticosteroids improve lung function &#40;FEV<span class="elsevierStyleInf">1</span>&#41;&#44; oxygenation and shorten recovery time and hospitalization duration&#46;</p></li><li class="elsevierStyleListItem" id="lsti0290"><span class="elsevierStyleLabel"><span class="elsevierStyleBold">&#8226;</span></span><p id="par0910" class="elsevierStylePara elsevierViewall">Antibiotics&#44; when indicated&#44; shorten recovery time&#44; reduce the risk of early relapse&#44; treatment failure&#44; and hospitalization duration&#46;</p></li><li class="elsevierStyleListItem" id="lsti0295"><span class="elsevierStyleLabel"><span class="elsevierStyleBold">&#8226;</span></span><p id="par0915" class="elsevierStylePara elsevierViewall">Methylxanthines are not recommended due to side effects&#46;</p></li><li class="elsevierStyleListItem" id="lsti0300"><span class="elsevierStyleLabel"><span class="elsevierStyleBold">&#8226;</span></span><p id="par0920" class="elsevierStylePara elsevierViewall">Non-invasive mechanical ventilation should be the first mode of ventilation used to treat acute respiratory failure&#46;</p></li><li class="elsevierStyleListItem" id="lsti0305"><span class="elsevierStyleLabel"><span class="elsevierStyleBold">&#8226;</span></span><p id="par0925" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Following an exacerbation&#44; appropriate measures for exacerbation prevention should be initiated&#46;</span></p></li></ul></p><p id="par0930" class="elsevierStylePara elsevierViewall">Exacerbations are important events in the management of COPD because they negatively impact health status&#44; rates of hospitalization and readmission&#44; and disease progression&#46;<a class="elsevierStyleCrossRefs" href="#bib2180"><span class="elsevierStyleSup">237&#44;238</span></a> COPD exacerbations are complex events usually associated with increased airway inflammation&#44; increased mucus production and marked gas trapping&#46; Increased dyspnea is the key symptom of an exacerbation&#46; Other symptoms include increased sputum purulence and volume&#44; together with increased cough and wheeze&#46;<a class="elsevierStyleCrossRef" href="#bib2190"><span class="elsevierStyleSup">239</span></a> As comorbidities are common in COPD patients&#44; exacerbations must be differentiated from acute coronary syndrome&#44; worsening congestive heart failure&#44; pulmonary embolism and pneumonia&#46;</p><p id="par0935" class="elsevierStylePara elsevierViewall">COPD exacerbations are classified as&#58;<ul class="elsevierStyleList" id="lis0065"><li class="elsevierStyleListItem" id="lsti0310"><span class="elsevierStyleLabel">&#8226;</span><p id="par0940" class="elsevierStylePara elsevierViewall">Mild &#40;treated with short acting bronchodilators only&#44; SABDs&#41;</p></li><li class="elsevierStyleListItem" id="lsti0315"><span class="elsevierStyleLabel">&#8226;</span><p id="par0945" class="elsevierStylePara elsevierViewall">Moderate &#40;treated with SABDs plus antibiotics and&#47;or oral corticosteroids&#41; or</p></li><li class="elsevierStyleListItem" id="lsti0320"><span class="elsevierStyleLabel">&#8226;</span><p id="par0950" class="elsevierStylePara elsevierViewall">Severe &#40;patient requires hospitalization or visits the emergency room&#41;&#46; Severe exacerbations may be associated with acute respiratory failure&#46;</p></li></ul></p><p id="par0955" class="elsevierStylePara elsevierViewall">Exacerbations are mainly triggered by respiratory viral infections although bacterial infections and environmental factors may also initiate and&#47;or amplify these events&#46;<a class="elsevierStyleCrossRef" href="#bib2195"><span class="elsevierStyleSup">240</span></a></p><p id="par0960" class="elsevierStylePara elsevierViewall">Exacerbations can be associated with increased sputum production and&#44; if purulent&#44; increased bacteria may be found in the sputum<a class="elsevierStyleCrossRefs" href="#bib2190"><span class="elsevierStyleSup">239&#44;241&#44;242</span></a> Some evidence supports the concept that eosinophils are increased in the airways&#44; lung&#44; and blood in a significant proportion of patients with COPD&#46; Exacerbations associated with an increase in sputum or blood eosinophils may be more responsive to systemic steroids<a class="elsevierStyleCrossRef" href="#bib2210"><span class="elsevierStyleSup">243</span></a> although more prospective data are needed&#46;<a class="elsevierStyleCrossRef" href="#bib2210"><span class="elsevierStyleSup">243</span></a></p><p id="par0965" class="elsevierStylePara elsevierViewall">Symptoms usually last between 7 to 10 days during an exacerbation&#44; but some events may last longer&#46; At 8 weeks&#44; 20&#37; of patients have not recovered to their pre-exacerbation state&#46;<a class="elsevierStyleCrossRef" href="#bib2215"><span class="elsevierStyleSup">244</span></a> COPD exacerbations increase susceptibility to additional events&#46;<a class="elsevierStyleCrossRefs" href="#bib1290"><span class="elsevierStyleSup">59&#44;245</span></a></p><p id="par0970" class="elsevierStylePara elsevierViewall">COPD patients susceptible to frequent exacerbations &#40;defined as &#8805; 2 exacerbations per year&#41; have worse health status and morbidity than patients with less frequent exacerbations&#46;<a class="elsevierStyleCrossRef" href="#bib2185"><span class="elsevierStyleSup">238</span></a> Other factors associated with an increased risk of acute exacerbations and&#47;or severity of exacerbations include an increase in the ratio of the pulmonary artery to aorta cross sectional dimension &#40;i&#46;e&#46;&#44; ratio<span class="elsevierStyleHsp" style=""></span>&#62;<span class="elsevierStyleHsp" style=""></span>1&#41;&#44;<a class="elsevierStyleCrossRef" href="#bib2225"><span class="elsevierStyleSup">246</span></a> a greater percentage of emphysema or airway wall thickness<a class="elsevierStyleCrossRef" href="#bib2230"><span class="elsevierStyleSup">247</span></a> measured by chest CT imaging and the presence of chronic bronchitis&#46;<a class="elsevierStyleCrossRefs" href="#bib2235"><span class="elsevierStyleSup">248&#44;249</span></a></p></span></span><span id="sec0350" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0370">Treatment Options</span><span id="sec0355" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0375">Treatment Setting</span><p id="par0975" class="elsevierStylePara elsevierViewall">The goals of exacerbation treatment are to minimize the negative impact of the current exacerbation&#44; and to prevent the development of subsequent events&#46;<a class="elsevierStyleCrossRef" href="#bib2245"><span class="elsevierStyleSup">250</span></a> Depending on the severity of an exacerbation and&#47;or the severity of the underlying disease&#44; an exacerbation can be managed in either the outpatient or inpatient setting&#46; More than 80&#37; of exacerbations are managed on an outpatient basis with bronchodilators&#44; corticosteroids&#44; and antibiotics&#46;<a class="elsevierStyleCrossRefs" href="#bib2250"><span class="elsevierStyleSup">251&#8211;253</span></a></p><p id="par0980" class="elsevierStylePara elsevierViewall">The indications for hospitalization during a COPD exacerbation are shown in Table S10 in the Supplementary Appendix&#46; When patients with a COPD exacerbation come to the emergency department&#44; they should be given supplemental oxygen and assessed to determine whether the exacerbation is life-threatening and requires consideration for non-invasive ventilation and ICU or respiratory unit hospitalization&#46;</p><p id="par0985" class="elsevierStylePara elsevierViewall">Long-term prognosis following hospitalization for COPD exacerbation is poor&#59; five-year mortality rate is about 50&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib2265"><span class="elsevierStyleSup">254</span></a> Factors associated with poor outcome include older age&#44; lower body mass index&#44; comorbidities &#40;e&#46;g&#46;&#44; cardiovascular disease or lung cancer&#41;&#44; previous hospitalizations for COPD exacerbations&#44; clinical severity of the index exacerbation&#44; and need for long-term oxygen therapy at discharge&#46;<a class="elsevierStyleCrossRefs" href="#bib2270"><span class="elsevierStyleSup">255&#44;256</span></a> Patients with a higher prevalence and severity of respiratory symptoms&#44; poorer quality of life&#44; worse lung function&#44; lower exercise capacity&#44; lower lung density and thickened bronchial walls on CT-scan are at increased mortality risk following an acute exacerbation&#46;<a class="elsevierStyleCrossRef" href="#bib2280"><span class="elsevierStyleSup">257</span></a></p><p id="par0990" class="elsevierStylePara elsevierViewall">Key points for the management of all exacerbations are given in <a class="elsevierStyleCrossRef" href="#tbl0040">Table 8</a>&#46;</p><elsevierMultimedia ident="tbl0040"></elsevierMultimedia></span><span id="sec0360" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0380">Pharmacologic Treatment</span><p id="par0995" class="elsevierStylePara elsevierViewall">The most commonly used classes of medications for COPD exacerbations are bronchodilators&#44; corticosteroids&#44; and antibiotics&#46;</p><p id="par1000" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Bronchodilators</span>&#46; Short-acting inhaled beta<span class="elsevierStyleInf">2</span>-agonists&#44; with or without short-acting anticholinergics&#44; are the initial bronchodilators recommended for acute treatment of exacerbations&#46;<a class="elsevierStyleCrossRefs" href="#bib2285"><span class="elsevierStyleSup">258&#44;259</span></a> There are no significant differences in FEV<span class="elsevierStyleInf">1</span> when using metered dose inhalers &#40;MDI&#41; &#40;with or without a spacer device&#41; or nebulizers to deliver the agent&#44;<a class="elsevierStyleCrossRef" href="#bib2295"><span class="elsevierStyleSup">260</span></a> although the latter may be an easier delivery method for sicker patients&#46; Intravenous methylxanthines are not recommended due to side effects&#46;<a class="elsevierStyleCrossRefs" href="#bib2300"><span class="elsevierStyleSup">261&#44;262</span></a></p><p id="par1005" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Glucocorticoids</span>&#46; Systemic glucocorticoids in COPD exacerbations shorten recovery time and improve FEV<span class="elsevierStyleInf">1</span>&#46; They also improve oxygenation&#44;<a class="elsevierStyleCrossRefs" href="#bib2310"><span class="elsevierStyleSup">263&#8211;266</span></a> the risk of early relapse&#44; treatment failure&#44;<a class="elsevierStyleCrossRef" href="#bib2330"><span class="elsevierStyleSup">267</span></a> and the length of hospitalization&#46;<a class="elsevierStyleCrossRefs" href="#bib2310"><span class="elsevierStyleSup">263&#44;265&#44;268</span></a> A dose of 40<span class="elsevierStyleHsp" style=""></span>mg prednisone per day for 5 days is recommended&#46;<a class="elsevierStyleCrossRef" href="#bib2340"><span class="elsevierStyleSup">269</span></a> Therapy with oral prednisolone is equally effective to intravenous administration&#46;<a class="elsevierStyleCrossRef" href="#bib2345"><span class="elsevierStyleSup">270</span></a> Glucocorticoids may be less efficacious to treat exacerbations in patients with lower blood eosinophil levels&#46;<a class="elsevierStyleCrossRefs" href="#bib1290"><span class="elsevierStyleSup">59&#44;243&#44;271</span></a></p><p id="par1010" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Antibiotics</span>&#46; The use of antibiotics in exacerbations remains controversial&#46;<a class="elsevierStyleCrossRefs" href="#bib2355"><span class="elsevierStyleSup">272&#8211;274</span></a> Evidence supports the use of antibiotics in patients with exacerbations and increased sputum purulence&#46;<a class="elsevierStyleCrossRefs" href="#bib2360"><span class="elsevierStyleSup">273&#44;274</span></a> One review reported that antibiotics reduce the risk of short-term mortality by 77&#37;&#44; treatment failure by 53&#37; and sputum purulence by 44&#37;<a class="elsevierStyleCrossRef" href="#bib2370"><span class="elsevierStyleSup">275</span></a> Procalcitonin-guided antibiotic treatment may reduce antibiotic exposure and side effects with the same clinical efficacy&#46;<a class="elsevierStyleCrossRefs" href="#bib2375"><span class="elsevierStyleSup">276&#44;277</span></a> A study in patients with exacerbations requiring mechanical ventilation &#40;invasive or noninvasive&#41; reported increased mortality and a higher incidence of secondary nosocomial pneumonia when antibitoics were not given&#46;<a class="elsevierStyleCrossRef" href="#bib2385"><span class="elsevierStyleSup">278</span></a> Antibiotics should be given to patients with acute exacerbations who have three cardinal symptoms&#58; increase in dyspnea&#44; sputum volume&#44; and sputum purulence&#59; have two of the cardinal symptoms&#44; if increased purulence of sputum is one of the two symptoms&#59; or require mechanical ventilation &#40;invasive or noninvasive&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib2190"><span class="elsevierStyleSup">239&#44;240</span></a> The recommended length of antibiotic therapy is 5-7 days&#46;<a class="elsevierStyleCrossRef" href="#bib2390"><span class="elsevierStyleSup">279</span></a></p><p id="par1015" class="elsevierStylePara elsevierViewall">Antibiotic choice should be based on the local bacterial resistance pattern&#46; Usual initial empirical treatment is an aminopenicillin with clavulanic acid&#44; a macrolide&#44; or a tetracycline&#46; In patients with frequent exacerbations&#44; severe airflow limitation&#44;<a class="elsevierStyleCrossRefs" href="#bib2395"><span class="elsevierStyleSup">280&#44;281</span></a> and&#47;or exacerbations requiring mechanical ventilation&#44;<a class="elsevierStyleCrossRef" href="#bib2405"><span class="elsevierStyleSup">282</span></a> cultures from sputum or other materials from the lung should be performed to identify the presence of resistant pathogens&#46; Administration route depends on the patient&#39;s ability to eat and the pharmacokinetics of the antibiotic&#46;</p></span><span id="sec0365" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0385">Respiratory Support</span><p id="par1020" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Oxygen therapy</span>&#46; Supplemental oxygen should be titrated to improve hypoxemia with a target saturation of 88-92&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib2410"><span class="elsevierStyleSup">283</span></a> Once oxygen is started&#44; blood gases should be checked to ensure satisfactory oxygenation without carbon dioxide retention and&#47;or worsening acidosis&#46;</p><p id="par1025" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Ventilatory support</span>&#46; Some patients require admission to the intensive care unit&#46; Admission of patients with severe exacerbations to intermediate or special respiratory care units may be appropriate if adequate personnel skills and equipment exist to manage acute respiratory failure&#46;</p><p id="par1030" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Noninvasive mechanical ventilation</span>&#46; NIV is preferred over invasive ventilation as the initial mode of ventilation to treat acute respiratory failure in patients hospitalized for acute exacerbations of COPD&#46; NIV has been studied in RCTs showing a success rate of 80-85&#37;&#46;<a class="elsevierStyleCrossRefs" href="#bib2415"><span class="elsevierStyleSup">284&#8211;288</span></a> Mortality and intubation rates are reduced by NIV&#46;<a class="elsevierStyleCrossRefs" href="#bib2415"><span class="elsevierStyleSup">284&#44;289&#8211;291</span></a></p><p id="par1035" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Invasive mechanical ventilation</span>&#46; The indication for initiating invasive mechanical ventilation during an exacerbation includes failure of an initial trial of NIV&#46;<a class="elsevierStyleCrossRef" href="#bib2455"><span class="elsevierStyleSup">292</span></a> In patients who fail non-invasive ventilation as initial therapy and receive invasive ventilation as subsequent rescue therapy&#44; morbidity&#44; hospital length of stay and mortality are greater&#46;<a class="elsevierStyleCrossRef" href="#bib2430"><span class="elsevierStyleSup">287</span></a></p></span><span id="sec0370" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0390">Hospital Discharge and Follow-Up</span><p id="par1040" class="elsevierStylePara elsevierViewall">Lack of spirometric assessment and arterial blood gas analysis have been associated with re-hospitalization and mortality&#46;<a class="elsevierStyleCrossRef" href="#bib2460"><span class="elsevierStyleSup">293</span></a> Mortality relates to patient age&#44; the presence of acidotic respiratory failure&#44; the need for ventilatory support and comorbidities including anxiety and depression&#46;<a class="elsevierStyleCrossRef" href="#bib2465"><span class="elsevierStyleSup">294</span></a></p><p id="par1045" class="elsevierStylePara elsevierViewall">The introduction of care bundles at hospital discharge to include education&#44; optimization of medication&#44; supervision and correction of inhaler technique&#44; assessment and optimal management of comorbidities&#44; early rehabilitation&#44; telemonitoring and continued patient contact have been investigated&#46;<a class="elsevierStyleCrossRef" href="#bib2470"><span class="elsevierStyleSup">295</span></a> There is insufficient data that they influence readmission rates&#44; short-term mortality<a class="elsevierStyleCrossRefs" href="#bib2460"><span class="elsevierStyleSup">293&#44;294&#44;296&#44;297</span></a> or cost-effectiveness&#46;<a class="elsevierStyleCrossRef" href="#bib2465"><span class="elsevierStyleSup">294</span></a></p><p id="par1050" class="elsevierStylePara elsevierViewall">Early follow-up &#40;&#60; 30 days&#41; following discharge should be undertaken when possible and has been related to less exacerbation-related readmissions&#46;<a class="elsevierStyleCrossRefs" href="#bib1925"><span class="elsevierStyleSup">186&#44;298</span></a> Early follow-up permits a careful review of discharge therapy and an opportunity to make changes in therapy&#46; Patients not attending early follow-up have increased 90-day mortality&#46;</p><p id="par1055" class="elsevierStylePara elsevierViewall">Additional follow-up at three months is recommended to ensure return to a stable state and review of patient&#39;s symptoms&#44; lung function &#40;by spirometry&#41;&#44; and when possible the assessment of prognosis using multiple scoring systems such as BODE&#46;<a class="elsevierStyleCrossRefs" href="#bib2485"><span class="elsevierStyleSup">298&#44;299</span></a> An assessment of the presence and management of comorbidities should also be undertaken &#40;Table S11 in the Supplementary Appendix&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib2495"><span class="elsevierStyleSup">300</span></a></p></span><span id="sec0375" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0395">Prevention of Exacerbations</span><p id="par1060" class="elsevierStylePara elsevierViewall">After an acute exacerbation&#44; measures for prevention of further exacerbations should be initiated &#40;Table S12 in the Supplementary Appendix&#41;&#46;</p></span><span id="sec0380" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0400">COPD and Comorbidities</span><p id="par1065" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Key Points</span><ul class="elsevierStyleList" id="lis0070"><li class="elsevierStyleListItem" id="lsti0325"><span class="elsevierStyleLabel">&#8226;</span><p id="par1070" class="elsevierStylePara elsevierViewall">COPD often coexists with other diseases &#40;comorbidities&#41; that may significantly impact patient outcome&#46;</p></li><li class="elsevierStyleListItem" id="lsti0330"><span class="elsevierStyleLabel">&#8226;</span><p id="par1075" class="elsevierStylePara elsevierViewall">The presence of comorbidities should not alter COPD treatment and comorbidities should be treated per usual standards regardless of the presence of COPD&#46;</p></li><li class="elsevierStyleListItem" id="lsti0335"><span class="elsevierStyleLabel">&#8226;</span><p id="par1080" class="elsevierStylePara elsevierViewall">When COPD is part of a multi-morbidity care plan&#44; attention should be directed to ensure simplicity of treatment and minimize polypharmacy&#46;</p></li></ul></p><p id="par1085" class="elsevierStylePara elsevierViewall">COPD often coexists with other diseases &#40;comorbidities&#41; that may have a significant impact on prognosis&#46;<a class="elsevierStyleCrossRefs" href="#bib1310"><span class="elsevierStyleSup">63&#44;301&#8211;307</span></a> Some of these arise independently of COPD whereas others may be causally related&#44; either with shared risk factors&#44; or by one disease increasing the risk or compounding the severity of the other&#46;<a class="elsevierStyleCrossRef" href="#bib2535"><span class="elsevierStyleSup">308</span></a> Management of the COPD patient must include identification and treatment of its comorbidities&#59; the most common in COPD are outlined below&#46;</p></span><span id="sec0385" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0405">Cardiovascular disease</span><span id="sec0390" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0410">Heart failure</span><p id="par1090" class="elsevierStylePara elsevierViewall">The prevalence of systolic or diastolic heart failure in COPD patients ranges from 20 to 70&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib2540"><span class="elsevierStyleSup">309</span></a> Unrecognized heart failure may mimic or accompany acute exacerbations of COPD&#59; 40&#37; of COPD patients that are mechanically ventilated because of hypercapnic respiratory failure have evidence of left ventricular dysfunction&#46;<a class="elsevierStyleCrossRefs" href="#bib2545"><span class="elsevierStyleSup">310&#44;311</span></a> Treatment with &#223;<span class="elsevierStyleInf">1</span>-blockers improves survival in chronic heart failure and is recommended&#46; Selective &#223;<span class="elsevierStyleInf">1</span>-blockers should be used&#46;<a class="elsevierStyleCrossRef" href="#bib2555"><span class="elsevierStyleSup">312</span></a></p></span></span><span id="sec0395" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0415">Ischemic heart disease</span><p id="par1095" class="elsevierStylePara elsevierViewall">There is an increased risk of myocardial damage in patients with concomitant ischemic heart disease who have an acute exacerbation of COPD&#46; Patients who demonstrate abnormal cardiac troponins are at an increased risk of adverse outcomes including short-term &#40;30 day&#41; and long-term mortality&#46;<a class="elsevierStyleCrossRef" href="#bib2560"><span class="elsevierStyleSup">313</span></a></p></span><span id="sec0400" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0420">Arrhythmias</span><p id="par1100" class="elsevierStylePara elsevierViewall">Cardiac arrhythmias are common in COPD and vice versa&#46; Atrial fibrillation is frequent and directly associated with FEV<span class="elsevierStyleInf">1</span>&#46; Bronchodilators have been previously described as potentially pro-arrhythmic agents<a class="elsevierStyleCrossRefs" href="#bib2565"><span class="elsevierStyleSup">314&#44;315</span></a>&#59; however&#44; evidence suggests an overall acceptable safety profile for long-acting beta<span class="elsevierStyleInf">2</span>-agonists&#44;<a class="elsevierStyleCrossRef" href="#bib2575"><span class="elsevierStyleSup">316</span></a> anticholinergic drugs &#40;and inhaled corticosteroids&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib1510"><span class="elsevierStyleSup">103&#44;115&#44;253&#44;317&#8211;322</span></a></p></span><span id="sec0405" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0425">Peripheral vascular disease</span><p id="par1105" class="elsevierStylePara elsevierViewall">In a large cohort of patients with COPD of all degrees of severity&#44; 8&#46;8&#37; were diagnosed with peripheral artery disease &#40;PAD&#41; that was higher than the prevalence in non-COPD controls &#40;1&#46;8&#37;&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib2610"><span class="elsevierStyleSup">323</span></a> COPD patients with PAD reported a worse functional capacity and worse health status compared to those without PAD&#46;</p></span><span id="sec0410" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0430">Hypertension</span><p id="par1110" class="elsevierStylePara elsevierViewall">Hypertension is likely to be the most frequently occurring comorbidity in COPD and may have implications for prognosis&#46;<a class="elsevierStyleCrossRefs" href="#bib2535"><span class="elsevierStyleSup">308&#44;324</span></a></p></span><span id="sec0415" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0435">Osteoporosis</span><p id="par1115" class="elsevierStylePara elsevierViewall">Osteoporosis is often associated with emphysema&#44;<a class="elsevierStyleCrossRefs" href="#bib2620"><span class="elsevierStyleSup">325&#44;326</span></a> decreased body mass index<a class="elsevierStyleCrossRef" href="#bib2630"><span class="elsevierStyleSup">327</span></a> and low fat-free mass&#46;<a class="elsevierStyleCrossRef" href="#bib2635"><span class="elsevierStyleSup">328</span></a> Low bone mineral density and fractures are common in COPD patients even after adjustment for steroid use&#44; age&#44; pack-years of smoking&#44; current smoking&#44; and exacerbations&#46;<a class="elsevierStyleCrossRefs" href="#bib2640"><span class="elsevierStyleSup">329&#44;330</span></a> An association between inhaled corticosteroids and fractures has been found in pharmaco-epidemiological studies&#46; Systemic corticosteroids significantly increase the risk of osteoporosis&#46;</p></span><span id="sec0420" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0440">Anxiety and Depression</span><p id="par1120" class="elsevierStylePara elsevierViewall">Anxiety and depression are both associated with a poor prognosis&#46;<a class="elsevierStyleCrossRefs" href="#bib2650"><span class="elsevierStyleSup">331&#44;332</span></a></p></span><span id="sec0425" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0445">COPD and Lung Cancer</span><p id="par1125" class="elsevierStylePara elsevierViewall">The association between emphysema and lung cancer is stronger than between airflow limitation and lung cancer&#46;<a class="elsevierStyleCrossRefs" href="#bib2660"><span class="elsevierStyleSup">333&#8211;335</span></a> Increased age and greater smoking history further increases risk&#46;<a class="elsevierStyleCrossRef" href="#bib2675"><span class="elsevierStyleSup">336</span></a> Two studies of low-dose chest computed tomography &#40;LDCT&#41; screening report improved survival in subjects aged 55-74 years&#44; current smokers or those who quit within the previous 15 years&#44; with a smoking history of at least 30 pack-years&#46;<a class="elsevierStyleCrossRefs" href="#bib2680"><span class="elsevierStyleSup">337&#44;338</span></a> LDCT is now recommended in the U&#46;S&#46; for patients meeting these demographics&#59; however&#44; this is not a worldwide practice&#46;</p></span><span id="sec0430" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0450">Metabolic Syndrome and Diabetes</span><p id="par1130" class="elsevierStylePara elsevierViewall">Metabolic syndrome and diabetes are more frequent in COPD and the latter is likely to affect prognosis&#46;<a class="elsevierStyleCrossRef" href="#bib2505"><span class="elsevierStyleSup">302</span></a> The prevalence of metabolic syndrome has been estimated to be more than 30&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib2690"><span class="elsevierStyleSup">339</span></a></p></span><span id="sec0435" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0455">Gastroesophageal Reflux</span><p id="par1135" class="elsevierStylePara elsevierViewall">Gastroesophageal reflux is an independent risk factor for exacerbations and is associated with worse health status&#46;<a class="elsevierStyleCrossRefs" href="#bib2250"><span class="elsevierStyleSup">251&#44;340&#44;341</span></a></p></span><span id="sec0440" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0460">Bronchiectasis</span><p id="par1140" class="elsevierStylePara elsevierViewall">Bronchiectasis is associated with longer exacerbations<a class="elsevierStyleCrossRef" href="#bib2705"><span class="elsevierStyleSup">342</span></a> and increased mortality&#46;<a class="elsevierStyleCrossRef" href="#bib2495"><span class="elsevierStyleSup">300</span></a></p></span><span id="sec0445" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0465">Obstructive Sleep Apnea</span><p id="par1145" class="elsevierStylePara elsevierViewall">Patients with &#8220;overlap syndrome&#8221; &#40;COPD and OSA&#41; have a worse prognosis compared with COPD or OSA&#46; Apneic events in patients with OSA and COPD have more profound hypoxemia and more cardiac arrhythmias<a class="elsevierStyleCrossRef" href="#bib2710"><span class="elsevierStyleSup">343</span></a> and are more likely to develop daytime pulmonary hypertension<a class="elsevierStyleCrossRefs" href="#bib2715"><span class="elsevierStyleSup">344&#44;345</span></a> than patients with just OSA or COPD alone&#46;</p></span></span><span id="sec0460" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0470">Conflict of Interests</span><p id="par1160" class="elsevierStylePara elsevierViewall">The conflict of interest statement of the authors &#40;GOLD-Disclosures-Authors&#41; is available in the additional material of this article in its electronic version&#44; at <a href="doi:10.1016/j.arbres.2017.02.001">doi&#58;10&#46;1016&#47;j&#46;arbres&#46;2017&#46;02&#46;001</a>&#46;</p></span></span>"
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          "titulo" => "Introduction"
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          "titulo" => "Definition and Factors That Influence COPD Development and Progression"
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    "fechaRecibido" => "2017-01-26"
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            1 => "COPD diagnosis"
            2 => "COPD management"
            3 => "COPD prevention"
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        "titulo" => "Abstract"
        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">This Executive Summary of the Global Strategy for the Diagnosis&#44; Management&#44; and Prevention of COPD &#40;GOLD&#41; 2017 Report focuses primarily on the revised and novel parts of the document&#46; The most significant changes include&#58; 1&#41; the assessment of COPD has been refined to separate the spirometric assessment from symptom evaluation&#46; ABCD groups are now proposed to be derived exclusively from patient symptoms and their history of exacerbations&#59; 2&#41; for each of the groups A to D&#44; escalation strategies for pharmacological treatments are proposed&#59; 3&#41; the concept of de-escalation of therapy is introduced in the treatment assessment scheme&#59; 4&#41; nonpharmacologic therapies are comprehensively presented and&#59; 5&#41; the importance of comorbid conditions in managing COPD is reviewed&#46;</p></span>"
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        "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Este resumen ejecutivo del Informe de 2017 de la <span class="elsevierStyleItalic">Global Strategy for the Diagnosis&#44; Management&#44; and Prevention of COPD</span> &#40;GOLD&#41; se basa primordialmente en las modificaciones y novedades del informe anterior&#46; Los cambios m&#225;s destacados incluyen&#58; a&#41; se diferencia la exploraci&#243;n espirom&#233;trica de la de los s&#237;ntomas para la evaluaci&#243;n de la enfermedad pulmonar obstructiva cr&#243;nica &#40;EPOC&#41;&#59; de este modo&#44; los grupos ABCD se refieren exclusivamente a s&#237;ntomas y antecedentes de exacerbaciones de los pacientes&#59; b&#41; se optimiza la estrategia terap&#233;utica farmacol&#243;gica en cada uno de los cuatro grupos&#59; c&#41; se propone una reducci&#243;n escalonada de la medicaci&#243;n en el apartado terap&#233;utico&#59; d&#41; se detalla m&#225;s extensamente el tratamiento no farmacol&#243;gico&#59; y&#44; f&#41; se repasa la importancia de las diferentes co-morbilidades en lo que respecta al tratamiento de la EPOC&#46;</p></span>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as&#58; Vogelmeier CF&#44; Criner GJ&#44; Martinez FJ&#44; Anzueto A&#44; Barnes PJ&#44; Bourbeau J&#44; et al&#46; Documento sobre la estrategia global para el diagn&#243;stico&#44; el manejo&#44; y la prevenci&#243;n de la Enfermedad Pulmonar Obstructiva Cr&#243;nica&#58; Sumario ejecutivo de la GOLD&#46; Arch Bronconeumol&#46; 2017&#59;53&#58;128&#8211;149&#46;</p>"
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Journal Information
Vol. 53. Issue 3.
Pages 128-149 (March 2017)
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14786
Vol. 53. Issue 3.
Pages 128-149 (March 2017)
Special article
Full text access
Global Strategy for the Diagnosis, Management, and Prevention of Chronic Obstructive Lung Disease 2017 Report: GOLD Executive Summary
Informe 2017 de la Iniciativa Global para el Diagnóstico, Tratamiento y Prevención de la Enfermedad Pulmonar Obstructiva Crónica: Resumen Ejecutivo de GOLD
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14786
Claus F. Vogelmeiera,1,
Corresponding author
, Gerard J. Crinerb,1, Fernando J. Martinezc,1, Antonio Anzuetod, Peter J. Barnese, Jean Bourbeauf, Bartolome R. Cellig, Rongchang Chenh, Marc Decrameri, Leonardo M. Fabbrij, Peter Frithk, David M.G. Halpinl, M. Victorina López Varelam, Masaharu Nishimuran, Nicolas Rocheo, Roberto Rodriguez-Roisinp, Don D. Sinq, Dave Singhr, Robert Stockleys, Jørgen Vestbor..., Jadwiga A. Wedzichat, Alvar AgustiuVer más
a University of Marburg, Marburg, Germany, Member of the German Center for Lung Research (DZL)
b Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
c New York-Presbyterian Hospital, Weill Cornell Medical Center, New York, New York, USA
d University of Texas Health Science Center and South Texas Veterans Health Care System, San Antonio, Texas, USA
e National Heart and Lung Institute, Imperial College, London, United Kingdom
f McGill University Health Centre, McGill University, Montreal, Canada
g Brigham and Women's Hospital Boston, Massachusetts, USA
h State Key Lab for Respiratory Disease, Guangzhou Institute of Respiratory Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, PRC
i University of Leuven, Leuven, Belgium
j University of Modena & Reggio Emilia, Modena, Italy
k Flinders University Faculty of Medicine, Bedford Park, South Australia, Australia
l Royal Devon & Exeter Hospital, Exeter, UK
m Universidad de la República, Hospital Maciel, Montevideo, Uruguay
n Hokkaido University School of Medicine Sapporo, Japan
o Hôpital Cochin (APHP), University Paris Descartes, Paris, France
p Thorax Institute, Hospital Clinic Universitat de Barcelona, Barcelona, Spain
q St. Paul's Hospital, University of British Columbia, Vancouver, Canada
r University of Manchester, Manchester, UK
s University Hospital, Birmingham, UK
t Imperial College London, London, UK
u Hospital Clínic, Universitat de Barcelona, Ciberes, Barcelona, Spain
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Tables (8)
Table 1. Key indicators for considering a dagnosis of COPD.
Table 2. Role of spirometry.
Table 3. Bronchodilators in stable COPD.
Table 4. Anti-inflammatory therapy in stable COPD.
Table 5. Key points for the use of bronchodilators.
Table 6. Key points for the use of anti-inflammatory agents.
Table 7. Key points for the use of other pharmacologic treatments.
Table 8. Key points for the management of exacerbations.
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Abstract

This Executive Summary of the Global Strategy for the Diagnosis, Management, and Prevention of COPD (GOLD) 2017 Report focuses primarily on the revised and novel parts of the document. The most significant changes include: 1) the assessment of COPD has been refined to separate the spirometric assessment from symptom evaluation. ABCD groups are now proposed to be derived exclusively from patient symptoms and their history of exacerbations; 2) for each of the groups A to D, escalation strategies for pharmacological treatments are proposed; 3) the concept of de-escalation of therapy is introduced in the treatment assessment scheme; 4) nonpharmacologic therapies are comprehensively presented and; 5) the importance of comorbid conditions in managing COPD is reviewed.

Keywords:
Chronic Obstructive Pulmonary Disease
COPD diagnosis
COPD management
COPD prevention
Resumen

Este resumen ejecutivo del Informe de 2017 de la Global Strategy for the Diagnosis, Management, and Prevention of COPD (GOLD) se basa primordialmente en las modificaciones y novedades del informe anterior. Los cambios más destacados incluyen: a) se diferencia la exploración espirométrica de la de los síntomas para la evaluación de la enfermedad pulmonar obstructiva crónica (EPOC); de este modo, los grupos ABCD se refieren exclusivamente a síntomas y antecedentes de exacerbaciones de los pacientes; b) se optimiza la estrategia terapéutica farmacológica en cada uno de los cuatro grupos; c) se propone una reducción escalonada de la medicación en el apartado terapéutico; d) se detalla más extensamente el tratamiento no farmacológico; y, f) se repasa la importancia de las diferentes co-morbilidades en lo que respecta al tratamiento de la EPOC.

Palabras clave:
Diagnóstico de enfermedad pulmonar obstructiva crónica
EPOC
Evaluación
Prevención
Full Text
Introduction

This Executive Summary of the Global Strategy for the Diagnosis, Management, and Prevention of COPD (GOLD) 2017 Report is based on peer-reviewed publications to October 2016.

Levels of evidence are assigned to evidence-based recommendations where appropriate. Categories used to grade the levels of evidence are provided in Table S1 in the Supplementary Appendix.

Definition and Factors That Influence COPD Development and Progression

Key Points[TS: Set all “Key Points”] boxes as they were in original GOLD (http://www.atsjournals.org/doi/pdf/10.1164/rccm.201204-0596PP).]

  • COPD is a common, preventable and treatable disease that is characterized by persistent respiratory symptoms and airflow limitation due to airway and/or alveolar abnormalities usually caused by significant exposure to noxious particles or gases.

  • Dyspnea, cough and/or sputum production are the most frequent symptoms; symptoms are commonly under-reported by patients.

  • Tobacco smoking is the main risk exposure for COPD, but environmental exposures like biomass fuel exposure and air pollution may contribute. Besides exposures, host factors (genetic abnormalities, abnormal lung development and accelerated aging) predispose individuals to develop COPD.

  • COPD may be punctuated by acute worsening of respiratory symptoms, called exacerbations.

  • In most patients, COPD is associated with significant concomitant chronic diseases, which increase morbidity and mortality.

Definition and Pathogenesis

COPD is a common, preventable and treatable disease that is characterized by persistent respiratory symptoms and airflow limitation that is due to airway and/or alveolar abnormalities usually caused by significant exposure to noxious particles or gases.

The chronic airflow limitation that characterizes COPD is caused by a mixture of small airways disease (e.g., obstructive bronchiolitis) and parenchymal destruction (emphysema), the relative contributions of which vary from person to person. Chronic inflammation causes structural changes, small airways narrowing and destruction of lung parenchyma. A loss of small airways may contribute to airflow limitation and mucociliary dysfunction, a characteristic feature of the disease.

Chronic respiratory symptoms may precede the development of airflow limitation and be associated with acute respiratory events.1 Chronic respiratory symptoms may exist in individuals with normal spirometry1,2 and a significant number of smokers without airflow limitation have structural evidence of lung disease manifested by the presence of emphysema, airway wall thickening and gas trapping.1,2

Factors That Influence Disease Development and Progression

Although cigarette smoking is the most well studied COPD risk factor, epidemiologic studies demonstrate that non-smokers may also develop chronic airflow limitation.3 Compared to smokers with COPD, never smokers with chronic airflow limitation have fewer symptoms, milder disease and a lower burden of systemic inflammation.4 Never smokers with chronic airflow limitation do not have an increased risk of lung cancer, or cardiovascular comorbidities; however, they have an increased risk of pneumonia and mortality from respiratory failure.4

Processes occurring during gestation, birth, and exposures during childhood and adolescence affect lung growth.5,6 Reduced maximal attained lung function (as measured by spirometry) may identify individuals at increased risk for COPD.2,7 Factors in early life termed “childhood disadvantage factors” are as important as heavy smoking in predicting lung function in adult life.8 An examination of three different longitudinal cohorts found that approximately 50% of patients developed COPD due to an accelerated decline in FEV1; the other 50% developed COPD due to abnormal lung growth and development.

Cigarette smokers have a higher prevalence of respiratory symptoms and lung function abnormalities, a greater annual rate of decline in FEV1, and a greater COPD mortality rate than non-smokers.9 Other types of tobacco (e.g., pipe, cigar, water pipe)10–12 and marijuana13 are also risk factors for COPD. Passive exposure to cigarette smoke, also known as environmental tobacco smoke (ETS), may also contribute to respiratory symptoms and COPD14 by increasing the lung's total burden of inhaled particles and gases. Smoking during pregnancy may pose a risk for the fetus, by affecting in utero lung growth and development, and possibly priming the immune system.15

Occupational exposures, including organic and inorganic dusts, chemical agents and fumes, are under-appreciated risk factors for COPD development.16,17

Wood, animal dung, crop residues, and coal, typically burned in open fires or poorly functioning stoves, may lead to indoor air pollution.18 Indoor pollution from biomass cooking and heating, in poorly ventilated dwellings, is a risk for COPD.19–21

Asthma may be a risk for the development of chronic airflow limitation and COPD.22

Airway hyper-responsiveness can exist without a clinical diagnosis of asthma and is an independent predictor of COPD and respiratory mortality in population studies23,24 and may indicate a risk for excessive lung function decline in mild COPD.25

A history of severe childhood respiratory infection is associated with reduced lung function and increased respiratory symptoms in adulthood.26 HIV infection accelerates the onset of smoking-related emphysema and COPD27; tuberculosis has also been identified as a risk for COPD as well as a potential comorbidity.28–30

Diagnosis and Initial Assessment

Key Points

  • COPD should be considered in any patient with dyspnea, chronic cough or sputum production, and/or a history of exposure to risk factors.

  • Spirometry is required to make the diagnosis; a post-bronchodilator FEV1/FVC<0.70 confirms the presence of persistent airflow limitation.

  • The goals of COPD assessment are to determine the level of airflow limitation, the impact of disease on the patient's health status, and the risk of future events (such as exacerbations, hospital admissions, or death) to guide therapy.

  • Concomitant chronic diseases occur frequently in COPD patients and should be treated because they can independently affect mortality and hospitalizations.

Diagnosis

COPD should be considered in any patient with dyspnea, chronic cough or sputum production, and/or a history of exposure to risk factors for the disease (Fig. 1 and Table 1). Spirometry is required to make the diagnosis in this clinical context31; a post-bronchodilator FEV1/FVC<0.70 confirms the presence of persistent airflow limitation and identifies the presence of COPD in patients with appropriate symptoms and predisposing risks.

Fig. 1.

Pathways to the diagnosis of COPD.

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Table 1.

Key indicators for considering a dagnosis of COPD.

Consider COPD, and perform spirometry, if any of these indicators are present in an individual over age 40. These indicators are not diagnostic themselves, but the presence of multiple key indicators increases the probability of a diagnosis of COPD. Spirometry is required to establish a diagnosis of COPD.   
Dyspnea that is:  Progressive over time. 
  Characteristically worse with exercise. 
  Persistent. 
Chronic cough:  May be intermittent and may be unproductive. 
  Recurrent wheeze. 
Chronic sputum production:  With any pattern. 
Recurrent lower respiratory tract infections   
History of risk factors:  Host factors (such as genetic factors, congenital/developmental abnormalities etc.). 
  Tobacco smoke. 
  Smoke from home cooking and heating fuels. 
  Occupational dusts, vapors, fumes, gases and other chemicals. 
Family history of COPD and/or childhood factors:  For example low birthweight, childhood respiratory infections. 
Symptoms

Chronic and progressive dyspnea is the most characteristic symptom of COPD.

Dyspnea. Dyspnea is a major cause of the disability and anxiety in COPD.32 The terms used to describe dyspnea vary individually and culturally.33

Cough. Chronic cough is often the first symptom of COPD and frequently discounted by the patient as a consequence of smoking and/or environmental exposures.

Sputum production. Regular sputum production>3 months in 2 consecutive years is the classical definition of chronic bronchitis34; an arbitrary definition that does not reflect the range of sputum production reported in COPD. Patients producing large volumes of sputum may have underlying bronchiectasis.

Wheezing and chest tightness. Wheezing and chest tightness may vary between days, and throughout a single day.

Additional features in severe disease. Fatigue, weight loss and anorexia are common in patients with more severe forms of COPD.35,36

Medical History

A detailed medical history of any patient who is known, or suspected, to have COPD should include:

  • Exposure to risk factors, such as smoking and occupational or environmental exposures.

  • Past medical history, including asthma, allergy, sinusitis, or nasal polyps; respiratory infections in childhood; other chronic respiratory and non-respiratory diseases.

  • Family history of COPD or other chronic respiratory diseases.

  • Pattern of symptom development: age of onset, type of symptom, more frequent or prolonged “winter colds,” and social restriction.

  • History of exacerbations or previous hospitalizations for a respiratory disorder.

  • Presence of comorbidities, such as heart disease, osteoporosis, musculoskeletal disorders, and malignancies.

  • Impact of disease on patient's life, including limitation of activity, missed work and economic impact, and feelings of depression or anxiety.

  • Social and family support available to the patient.

  • Possibilities for reducing risk factors, especially smoking cessation.

Physical examination

Although important for general health, a physical examination is rarely diagnostic in COPD. Physical signs of airflow limitation/hyperinflation are usually not identifiable until significantly impaired lung function is present.37,38

Spirometry

Spirometry is the most reproducible and objective measurement of airflow limitation. It is a noninvasive and readily available test. Good quality spirometry is possible in any healthcare setting; all healthcare workers who care for COPD patients should have access to spirometry.

A post-bronchodilator fixed ratio of FEV1/FVC<0.70 is the spirometric criterion for airflow limitation. This criterion is simple and independent of reference values and has been used in numerous clinical trials. However, it may result in more frequent diagnosis of COPD in the elderly,39,40 and less frequent diagnosis in adults<45 years,40 especially in mild disease, compared to a cut-off based on the lower limit of normal (LLN) values for FEV1/FVC. Several limitations occur with using LLN as the diagnostic criterion for spirometric obstruction: 1) LLN values are dependent on the choice of reference equations that use post-bronchodilator FEV1, 2) there are no longitudinal studies that validate using the LLN, and 3) studies using LLN in populations where smoking is not the major cause of COPD are lacking.

Normal spirometry may be defined by a new approach from the Global Lung Initiative (GLI).41,42 Using GLI equations, z scores were calculated for FEV1, FVC, and FEV1/FVC and compared to fixed ratio data. The findings suggest that among adults with GLI-defined normal spirometry, the use of a fixed ratio may misclassify individuals as having respiratory impairment. These findings await additional study in other cohorts.

The risk of misdiagnosis and over-treatment using the fixed ratio as a diagnostic criterion is limited since spirometry is only one parameter used to establish the clinical diagnosis of COPD. GOLD favors using the fixed ratio over LLN since diagnostic simplicity and consistency are crucial for the busy clinician.

Assessing the degree of reversibility of airflow limitation (e.g., measuring FEV1 before and after bronchodilator or corticosteroids) to make therapeutic decisions is not recommended43 since it does not aid the diagnosis of COPD, differentiate COPD from asthma, or predict the long-term response to treatment.44

In asymptomatic individuals without exposures to tobacco or other noxious stimuli, screening spirometry is not indicated. However, in those with symptoms and/or risk factors (e.g.,>20 pack-years of smoking or recurrent chest infections), the diagnostic yield for COPD is relatively high and spirometry should be considered.45,46 GOLD advocates active case finding45,47 i.e., performing spirometry in patients with symptoms and/or risk factors, but not routine screening spirometry in asymptomatic individuals without COPD risk factors.

Assessment

The goals of COPD assessment to guide therapy are 1) to determine the level of airflow limitation; 2) to define its impact on the patient's health status and; 3) identify the risk of future events (such as exacerbations, hospital admissions or death).

To achieve these goals, COPD assessment must consider separately the following aspects of the disease:

  • Presence and severity of the spirometric abnormality

  • Current nature and magnitude of symptoms

  • History/future risk of exacerbations

  • Presence of comorbidities

Classification of severity of airflow limitation

Spirometry should be performed after administration of an adequate dose of at least one short-acting inhaled bronchodilator in order to minimize variability.

The role of spirometry for the diagnosis, assessment and follow-up of COPD is summarized in Table 2.

Table 2.

Role of spirometry.

• Diagnosis 
• Assessment of severity of airflow obstruction (for prognosis) 
• Follow-up assessment 
○ Therapeutic decisions. 
■ Pharmacological in selected circumstances (e.g., discrepancy between spirometry and level of symptoms). 
■ Consider alternative diagnoses when symptoms are disproportionate to degree of airflow obstruction. 
■ Non-pharmacological (e.g., interventional procedures). 
○ Identification of rapid decline. 
Assessment of symptoms

COPD was previously viewed as a disease largely characterized by breathlessness. A simple measure of breathlessness such as the Modified British Medical Research Council (mMRC) Questionnaire48 was considered adequate for assessment of symptoms49–51 However, COPD impacts patients well beyond dyspnea.52 For this reason, a comprehensive assessment of symptoms is recommended. The most comprehensive disease-specific health status questionnaires include the Chronic Respiratory Questionnaire (CRQ)53 and St. George's Respiratory Questionnaire (SGRQ).54 These are too complex to use in clinical practice, but shorter measures e.g., the COPD Assessment Test (CATTM) are suitable.

Choice of thresholds

SGRQ scores<25 are uncommon in COPD patients55 and scores ≥ 25 are very uncommon in healthy persons.56,57 The equivalent cut-point for the CATTM is 10.58 A mMRC threshold of ≥ 2 is used to separate “less breathlessness” from “more breathlessness”.

Assessment of exacerbation risk

The best predictor of frequent exacerbations (defined as ≥ 2 exacerbations per year) is a history of earlier treated events.59 Hospitalization for a COPD exacerbation has a poor prognosis and an increased risk of death.60

Blood eosinophil count. Post-hoc analysis of two clinical trials in COPD patients with an exacerbation history showed that higher blood eosinophil counts may predict increased exacerbation rates in patients treated with long acting beta agonists (LABA) (without inhaled corticosteroid, ICS).61,62 The treatment effect of ICS/LABA versus LABA on exacerbations was greater in patients with higher blood eosinophil counts. These findings suggest that blood eosinophil counts are 1) a biomarker of exacerbation risk in patients with a history of exacerbations and 2) can predict the effects of ICS on exacerbation prevention. Prospective trials are required to validate the use of blood eosinophil counts to predict ICS effects, to determine a cut-off threshold for blood eosinophils that predicts exacerbation risk, and to clarify blood eosinophil cut-off values that could be used in clinical practice.

Assessment of concomitant chronic diseases (comorbidities)

Patients with COPD often have important concomitant chronic illnesses as COPD represents an important component of multimorbidity particularly in the elderly.60,63–65

Revised combined COPD assessment

The “ABCD” assessment tool of the 2011 GOLD Report was a major step forward from the simple spirometric grading system of earlier GOLD Reports because it incorporated patient-reported outcomes and highlighted the importance of exacerbation prevention in COPD management. However, there were important limitations. ABCD assessment performed no better than spirometric grades for mortality prediction, or other important health outcomes.66–68 Moreover, group “D” outcomes were modified by two parameters: lung function and/or exacerbation history, which caused confusion.69 To address these concerns, the 2017 GOLD Report provides a refinement of the ABCD assessment that separates spirometric grades from “ABCD” groupings. For some therapy recommendations, especially pharmacologic treatments, ABCD groups are derived exclusively from patient symptoms and their exacerbation history. However, spirometry, in conjunction with patient symptoms and exacerbation history, remains vital for the diagnosis, prognostication and consideration of other important therapeutic approaches, especially non-pharmacological therapies. This new approach to assessment is illustrated in Fig. 2.

Fig. 2.

The refined ABCD assessment tool.

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In the refined assessment scheme, patients should undergo spirometry to determine the severity of airflow limitation (i.e., spirometric grade). They should also undergo assessment of either dyspnea using mMRC or symptoms using CATTM. Finally, their history of exacerbations (including prior hospitalizations) should be recorded.

The number provides information regarding severity of airflow limitation (spirometric grades 1 to 4) while the letter (groups A to D) provides information regarding symptom burden and risk of exacerbation. FEV1 is a very important parameter at the population-level in the prediction of important clinical outcomes such as mortality and hospitalizations or prompting consideration for non-pharmacologic therapies such as lung reduction or lung transplantation. However, at the individual patient level, FEV1 loses precision and thus cannot be used alone to determine all therapeutic options. Furthermore, in some circumstances, such as during hospitalization or urgent presentation to the clinic or emergency room, the ability to assess patients based on symptoms and exacerbation history, independent of the spirometric value, allows clinicians to initiate a treatment plan based on the revised ABCD scheme. This approach acknowledges the limitations of FEV1 in making treatment decisions for individualized patient care and highlights the importance of patient symptoms and exacerbation risks in guiding therapies in COPD. The separation of airflow limitation from clinical parameters makes it clearer what is being evaluated and ranked. This should facilitate more precise treatment recommendations based on parameters that are driving the patient's symptoms at any given time.

Example. Consider two patients - both patients with FEV1<30% of predicted, CAT scores of 18 and one with no exacerbations in the past year, and the other with three exacerbations in the past year. Both would have been labelled GOLD D in the prior classification scheme. However, with the new proposed scheme, the subject with 3 exacerbations in the past year would be labelled GOLD grade 4, group D. Individual decisions on pharmacotherapeutic approaches would use the recommendations based on the ABCD assessment to treat the patient's major problem at this time, i.e., persistent exacerbations. The other patient, who has had no exacerbations, would be classified as GOLD grade 4, group B. In such patients —besides pharmacotherapy and rehabilitation —lung reduction, lung transplantation or bullectomy may be important therapeutic considerations given their symptom burden and level of spirometric limitation.

Alpha-1 antitrypsin deficiency

The World Health Organization recommends that all patients with a diagnosis of COPD be screened once for alpha-1 antitrypsin deficiency.70 A low concentration (< 20% normal) is suggestive of homozygous deficiency. Family members should be screened and together with the patient referred to specialist centres for advice and management.

Additional investigations

In order to rule out other concomitant disease contributing to respiratory symptoms, or in cases where patients do not respond to the treatment plan as expected, additional testing may be required. Thoracic imaging (chest x-ray, chest CT); assessment of lung volumes and/or diffusion capacity, oximetry and arterial blood gas measurement and exercise testing and assessment of physical activity should be considered.

Composite scores. The BODE (Body mass index, Obstruction, Dyspnea, and Exercise) method gives a composite score that is a better predictor of subsequent survival than any single component.71 Simpler alternatives that do not include exercise testing need validation to confirm suitability for routine clinical use.72,73

Differential diagnoses. In some patients, features of asthma and COPD may coexist. The terms Asthma-COPD Overlap Syndrome (ACOS) or Asthma-COPD Overlap (ACO) acknowledge the overlap of these two common disorders causing chronic airflow limitation rather than a distinct syndrome. Most other potential differential diagnoses are easier to distinguish from COPD.

Other considerations. Some patients without evidence of airflow limitation have evidence of structural lung disease on chest imaging (emphysema, gas trapping, airway wall thickening). Such patients may report exacerbations of respiratory symptoms or even require treatment with respiratory medications on a chronic basis. Whether these patients have acute or chronic bronchitis, a persistent form of asthma or an earlier presentation of what will become COPD as it is currently defined, is unclear and requires further study.

Prevention and Maintenance Therapy

Key Points

  • Smoking cessation is key. Pharmacotherapy and nicotine replacement increase long-term smoking abstinence rates.

  • The effectiveness and safety of e-cigarettes as a smoking cessation aid is uncertain.

  • Pharmacologic therapy can reduce COPD symptoms, reduce the frequency and severity of exacerbations, and improve health status and exercise tolerance.

  • Each pharmacologic treatment regimen should be individualized and guided by the severity of symptoms, risk of exacerbations, side-effects, comorbidities, drug availability and cost, and the patient's response, preference and ability to use various drug delivery devices.

  • Inhaler technique needs to be assessed regularly.

  • Influenza and pneumococcal vaccinations decrease the incidence of lower respiratory tract infections.

  • Pulmonary rehabilitation improves symptoms, quality of life, and physical and emotional participation in everyday activities.

  • In patients with severe resting chronic hypoxemia, long-term oxygen therapy improves survival.

  • In patients with stable COPD and resting or exercise-induced moderate desaturation, long-term oxygen treatment should not be prescribed routinely, however, individual patient factors should be considered.

  • In patients with severe chronic hypercapnia and a history of hospitalization for acute respiratory failure, long-term non-invasive ventilation may decrease mortality and prevent re-hospitalization.

  • In select patients with advanced emphysema refractory to optimized medical care, surgical or bronchoscopic interventional treatments may be beneficial.

  • Palliative approaches are effective in controlling symptoms in advanced COPD.

Smoking Cessation

Smoking cessation influences the natural history of COPD. If effective resources and time are dedicated to smoking cessation, long-term quit success rates of up to 25% can be achieved.74

Nicotine replacement products. Nicotine replacement therapy increases long-term smoking abstinence rates75–77 and is more effective than placebo. E-cigarettes are increasingly used as a form of nicotine replacement therapy, although their efficacy remains controversial.78–82

Pharmacologic products. Varenicline,83 bupropion,84 and nortriptyline85 increase long-term quit rates,85 but should be used as part of an interventional program rather than as a sole intervention.

Smoking cessation programs. A five-step program for intervention86,87 provides a framework to guide healthcare providers to help patients stop smoking.77,86,88 Counseling delivered by health professionals significantly increases quit rates over self-initiated strategies.89 The combination of pharmacotherapy and behavioral support increases smoking cessation rates.90

VaccinationsInfluenza vaccine and Pneumococcal vaccines

Influenza vaccination reduces serious illness,91 death,92–95 the risk of ischemic heart disease96 and the total number of exacerbations.92 Vaccines containing either killed or live inactivated viruses are recommended97 as they are more effective in elderly patients with COPD.98

Pneumococcal vaccinations, PCV13 and PPSV23, are recommended for all patients ≥ 65 years of age (see Table S2 in the Supplementary Appendix).

Pharmacologic Therapy for Stable COPDOverview of medications

Pharmacologic therapy for COPD reduces symptoms, the frequency and severity of exacerbations, and improves exercise tolerance and health status. No existing medication modifies the long-term decline in lung function.99–103 The classes of medications used to treat COPD are shown in Table S3 of the Supplementary Appendix. The choice within each class depends on the availability and cost of medication and favorable clinical response balanced against side effects. Each treatment regimen needs to be individualized as the relationship between severity of symptoms, airflow limitation, and severity of exacerbations varies between patients.

Bronchodilators

Bronchodilators increase FEV1, reduce dynamic hyperinflation, at rest and during exercise,104,105 and improve exercise performance. Bronchodilator medications are usually given on a regular basis to prevent or reduce symptoms. Toxicity is dose-related.

Beta2-agonists. Beta2-agonists, including short-acting (SABA) and long-acting (LABA) agents, relax airway smooth muscle. Stimulation of beta2-adrenergic receptors can produce resting sinus tachycardia and precipitate cardiac rhythm disturbances in susceptible patients. Exaggerated somatic tremor occurs in some patients treated with higher doses of beta2-agonists.

Antimuscarinic drugs. Ipratropium, a short acting muscarinic antagonist, provides small benefits over short-acting beta2-agonist in terms of lung function, health status and requirement for oral steroids.106 Long acting muscarinic antagonist (LAMA) treatment improves symptoms and health status,107,108 improves the effectiveness of pulmonary rehabilitation109,110 and reduces exacerbations and related hospitalizations.107 Clinical trials have shown a greater effect on exacerbation rates for LAMA treatment (tiotropium) versus LABA treatment.111,112 An unexpected small increase in cardiovascular events was reported in COPD patients regularly treated with ipratropium bromide.113,114 A large trial reported no difference in mortality, cardiovascular morbidity or exacerbation rates when using tiotropium as a dry-powder inhaler compared to a mist delivered by the Respimat® inhaler.115

Methylxanthines. Theophylline exerts a modest bronchodilator effect in stable COPD,116 and improves FEV1 and breathlessness when added to salmeterol.117,118 There is limited and contradictory evidence regarding the effect of low-dose theophylline on exacerbation rates.119,120 Toxicity is dose-related, which is a problem as most of the benefit occurs when near-toxic doses are given.116,121

Combination bronchodilator therapy

Combining bronchodilators with different mechanisms and durations of action may increase the degree of bronchodilation with a lower risk of side-effects compared to increasing the dose of a single bronchodilator (Table 3).122 There are numerous combinations of a LABA and LAMA in a single inhaler available (Table S3). These combinations improve lung function compared to placebo122 and have a greater impact on patient reported outcomes compared to monotherapies.123–126 LABA/LAMA improves symptoms and health status in COPD patients,127 is more effective than long-acting bronchodilator monotherapy for preventing exacerbations,128 and decreases exacerbations to a greater extent than ICS/LABA combination.129

Table 3.

Bronchodilators in stable COPD.

• Inhaled bronchodilators in COPD are central to symptom management and commonly given on a regular basis to prevent or reduce symptoms (Evidence A). 
• Regular and as-needed use of SABA or SAMA improves FEV1 and symptoms (Evidence A). 
• Combinations of SABA and SAMA are superior compared to either medication alone in improving FEV1 and symptoms (Evidence A). 
• LABAs and LAMAs significantly improve lung function, dyspnea, health status, and reduce exacerbation rates (Evidence A). 
• LAMAs have a greater effect on exacerbation reduction compared with LABAs (Evidence A) and decrease hospitalizations (Evidence B). 
• Combination treatment with a LABA and LAMA increases FEV1 and reduces symptoms compared to monotherapy (Evidence A). 
• Combination treatment with a LABA and LAMA reduces exacerbations compared to monotherapy (Evidence B) or ICS/LABA (Evidence B). 
• Tiotropium improves the effectiveness of pulmonary rehabilitation in increasing exercise performance (Evidence B). 
• Theophylline exerts a small bronchodilator effect in stable COPD (Evidence A) that is associated with modest symptomatic benefits (Evidence B). 
Anti-inflammatory agents

Exacerbations represent the main clinically relevant end-point used for the efficacy assessment of anti-inflammatory drugs (Table 4).

Table 4.

Anti-inflammatory therapy in stable COPD.

Inhaled corticosteroids 
• An ICS combined with a LABA is more effective than the individual components in improving lung function and health status and reducing exacerbations in patients with exacerbations and moderate to very severe COPD (Evidence A). 
• Regular treatment with ICS increases the risk of pneumonia especially in those with severe disease (Evidence A). 
• Triple inhaled therapy of ICS/LAMA/LABA improves lung function, symptoms and health status (Evidence A) and reduces exacerbations (Evidence B) compared to ICS/LABA or LAMA monotherapy. 
Oral glucocorticoids 
• Long-term use of oral glucocorticoids has numerous side effects (Evidence A) with no evidence of benefits (Evidence C). 
PDE4 inhibitors 
• In patients with chronic bronchitis, severe to very severe COPD and a history of exacerbations: 
○ A PDE4 inhibitor improves lung function and reduces moderate and severe exacerbations (Evidence A). 
○ A PDE4 inhibitor improves lung function and decreases exacerbations in patients who are on fixed-dose LABA/ICS combinations (Evidence B). 
Antibiotics 
• Long-term azithromycin and erythromycin therapy reduces exacerbations over one year (Evidence A). 
Treatment with azithromycin is associated with an increased incidence of bacterial resistance (Evidence A) and hearing test impairment (Evidence B). 
Mucolytics/antioxidants 
• Regular use of NAC and carbocysteine reduces the risk of exacerbations in select populations (Evidence B). 
Other anti-inflammatory agents 
• Simvastatin does not prevent exacerbations in COPD patients at increased risk of exacerbations and without indications for statin therapy (Evidence A). However, observational studies suggest that statins may have positive effects on some outcomes in patients with COPD who receive them for cardiovascular and metabolic indications (Evidence C). 
• Leukotriene modifiers have not been tested adequately in COPD patients. 
Inhaled corticosteroids

In patients with moderate to very severe COPD and exacerbations, an inhaled corticosteroid (ICS) combined with a LABA is more effective than either component alone in improving lung function, health status and reducing exacerbations.130,131 However, survival is not affected by combination therapy.132,133

ICS use has a higher prevalence of oral candidiasis, hoarse voice, skin bruising and pneumonia.134 Patients at higher risk of pneumonia include those who currently smoke, are aged>55 years, have a history of prior exacerbations or pneumonia, a body mass index (BMI)<25kg/m2, a poor MRC dyspnea grade and/or severe airflow limitation.135

Results from RCTs have yielded variable results regarding the risk of decreased bone density and fractures with ICS treatment.101,136–139 Observational studies suggest that ICS treatment could be associated with increased risks of diabetes/poor control of diabetes,140 cataracts,141 and mycobacterial infection142 including tuberculosis.143,144

ICS withdrawal. Withdrawal studies provide equivocal results regarding the consequences of withdrawal on lung function, symptoms and exacerbations.145–149

Triple inhaled therapy

Combination of LABA plus LAMA plus ICS (triple therapy) may improve lung function and patient reported outcomes.150–153 and reduce exacerbation risk.151,154–156 However, one RCT failed to demonstrate any benefit of adding an ICS to LABA plus LAMA on exacerbations.157 More evidence is needed to compare the benefits of triple therapy (LABA/LAMA/ICS) to LABA/LAMA.

Oral glucocorticoids

Oral glucocorticoids have no role in the chronic daily treatment in COPD because of a lack of benefit balanced against a high rate of systemic complications.

Phosphodiesterase-4 inhibitors

Roflumilast reduces moderate and severe exacerbations treated with systemic corticosteroids in patients with chronic bronchitis, severe to very severe COPD, and a history of exacerbations.158 Phosphodiesterase-4 (PDE4) inhibitors have more adverse effects than inhaled medications for COPD.159 The most frequent are diarrhea, nausea, reduced appetite, weight loss, abdominal pain, sleep disturbance, and headache. Roflumilast should be avoided in underweight patients and used with caution in patients with depression.

Antibiotics

Azithromycin (250mg/day or 500mg three times per week) or erythromycin (500mg two times per day) for one year reduces the risk of exacerbations in patients prone to exacerbations.160–162 Azithromycin use showed a reduced exacerbation rate in former smokers only and was associated with an increased incidence of bacterial resistance and impaired hearing tests.162 Pulse moxifloxacin therapy in patients with chronic bronchitis and frequent exacerbations does not reduce exacerbation rate.163

Mucolytic (mucokinetics, mucoregulators) and antioxidant agents (N-acetylcysteine, carbocysteine)

Regular treatment with mucolytics such as carbocysteine and N-acetylcysteine may reduce exacerbations and modestly improve health status in patients not receiving ICS.164,165

Other drugs with anti-inflammatory potential

Although RCTs suggest that immunoregulators decrease the severity and frequency of exacerbations,166,167 the long-term effects of this therapy are unknown. Nedocromil and leukotriene modifiers have not been adequately tested in COPD.168 There was no evidence of benefit, and some evidence of harm, following treatment with an anti-TNF-alpha antibody (infliximab) in moderate to severe COPD.169 Simvastatin did not prevent exacerbations in patients with COPD who had no metabolic or cardiovascular indication for statin treatment.170 An association between statin use and improved outcomes has been reported in observational studies of patients with COPD who received them for cardiovascular and metabolic indications.171 There is no evidence that vitamin D supplementation reduces exacerbations in unselected patients.172

Issues related to inhaled delivery

Observational studies have identified a significant relationship between poor inhaler use and symptom control in COPD.173 Determinants of poor inhaler technique include older age, use of multiple devices, and lack of previous education on inhaler technique.174 Education improves inhalation technique in some but not all patients,174 especially when the “teach-back” approach is implemented.175

Other pharmacologic treatments for COPD are summarized in Table S4 in the Supplementary Appendix.

Alpha-1 antitrypsin augmentation therapy. Observational studies suggest a reduction in spirometric progression in alpha-1 antitrypsin deficiency patients treated with augmentation therapy versus non-treated patients.176 Studies using sensitive parameters of emphysema progression determined by CT scans provide evidence for an effect on preserving lung tissue compared to placebo.177–179

Antitussives. The role of antitussives in patients with COPD is inconclusive.180

Vasodilators. Available studies report worsening gas exchange181 with little improvement in exercise capacity or health status in COPD patients.182,183

Rehabilitation, Education, and Self-ManagementPulmonary Rehabilitation

Pulmonary rehabilitation is a comprehensive intervention based on thorough patient assessment followed by patient-tailored therapies (e.g., exercise training, education, self-management interventions aimed at behavior changes to improve physical and psychological condition and promote adherence to health-enhancing behaviors in patients with COPD).184 The benefits of pulmonary rehabilitation are considerable (Table S5 in the Supplementary Appendix). Pulmonary rehabilitation can reduce readmissions and mortality in patients following a recent exacerbation (≤ 4 weeks from prior hospitalization).185 Initiating pulmonary rehabilitation before hospital discharge, however, may compromise survival.186

Pulmonary rehabilitation represents integrated patient management that includes a range of healthcare professionals187 and sites, including hospital inpatient and outpatient settings and/or the patient's home.184

Education, Self-Management, and Integrative Care

Education. Smoking cessation, correct use of inhaler devices, early recognition of exacerbation, decision making, when to seek help, surgical interventions, and the consideration of advance directives, are examples of educational topics.

Self-management. Self-management interventions that use written negotiated action plans for worsening symptoms may lead to less respiratory-related hospitalization and all cause hospitalizations and improved health status.188 The health benefits of COPD self-management programs may be negated by increased mortality.189,190 Generalization to real life remains difficult.

Integrated care programs. Integrated care programs improve several clinical outcomes, although not mortality.191 However, a large multi-center study within an existing well-organized system of care did not confirm this.192 Delivering integrated interventions by telemedicine provided no significant benefit.193

Supportive, Palliative, End-of-Life, and Hospice CareSymptom Control and Palliative Care

The goal of palliative care is to prevent and relieve suffering, and to improve quality of life for patients and their families, regardless of the stage of disease or the need for other therapies.194 Palliation efforts should be focused on the relief of dyspnea, pain, anxiety, depression, fatigue, and poor nutrition.

End-of-Life and Hospice Care

End of life care discussions should include patients and their families.195 Advance care planning can reduce anxiety for patients and their families, ensure that care is consistent with their wishes and avoid unnecessary, unwanted and costly invasive therapies196,197 Table S6 in the Supplementary Appendix summarizes the approach to palliation, end-of-life and hospice care

Other TreatmentsOxygen Therapy and Ventilatory Support

Oxygen therapy. The long-term administration of oxygen (> 15hours per day) to patients with chronic respiratory failure increases survival in patients with severe resting hypoxemia.198 Long term oxygen therapy does not lengthen time to death or first hospitalization or provide sustained benefit for any of the measured outcomes in patients with stable COPD and resting or exercise-induced moderate arterial oxygen desaturation.199

Ventilatory support. Whether to use NPPV chronically at home to treat patients with acute on chronic respiratory failure following hospitalization remains undetermined. Retrospective studies have provided inconclusive data.200,201 RCTs have yielded conflicting data on the use of home NPPV on survival and re-hospitalization in chronic hypercapnic COPD.202–205 In patients with both COPD and obstructive sleep apnea continuous positive airway pressure improves survival and avoids hospitalization (Table S7 in the Supplementary Appendix).206

Interventional TherapySurgical Interventions

Lung volume reduction surgery. A RCT confirmed that COPD patients with upper-lobe emphysema and low post-rehabilitation exercise capacity experienced improved survival when treated with lung volume reduction surgery (LVRS) compared to medical treatment.207 In patients with high post-pulmonary rehabilitation exercise capacity, no difference in survival was noted after LVRS, although health status and exercise capacity improved. LVRS has been demonstrated to result in higher mortality than medical management in severe emphysema patients with an FEV1 ≤ 20% predicted and either homogeneous emphysema in high resolution computed tomography or a DLCO of ≤ 20% of predicted.208

Bullectomy. In selected patients with relatively preserved underlying lung, bullectomy is associated with decreased dyspnea, improved lung function and exercise tolerance.209

Lung transplantation. In selected patients lung transplantation has been shown to improve health status and functional capacity but not to prolong survival.209–211 Bilateral lung transplantation has been reported to have longer survival than single lung transplantation in COPD patients, especially those<60 years of age.212

Bronchoscopic Interventions to Reduce Hyperinflation in Severe Emphysema

Less invasive bronchoscopic approaches to lung reduction have been developed.213 Prospective studies have shown that the use of bronchial stents is not effective214 while use of lung sealant caused significant morbidity and mortality.215 A RCT of endobronchial valve placement showed statistically significant improvements in FEV1 and 6-minute walk distance compared to control therapy at 6 months post intervention216 but the magnitude of the observed improvements was not clinically meaningful. Subsequently, efficacy of the same endobronchial valve has been studied in patients with heterogeneous,217 or heterogeneous and homogenous emphysema218 with mixed outcomes.

Two multicenter trials have examined nitinol coils implanted into the lung compared to usual care reported increases in 6minute walk distance with coil treatment compared to control and smaller improvements in FEV1 and quality of life measured by St George's Respiratory Questionnaire.219,220

Additional data are needed to define the optimal patient population to receive a specific bronchoscopic lung volume technique and to compare the long-term durability of improvements in functional or physiological performance to LVRS relative to side effects.220

Key points for interventional therapy in stable COPD are summarized in Table S8 in the Supplementary Appendix.

Management of Stable COPD

Key Points

  • The management strategy for stable COPD should be based on individualized symptom assessment and future risk of exacerbations.

  • All individuals who smoke should be supported to quit.

  • The main treatment goals are reduction of symptoms and future risk of exacerbations.

  • Management strategies are not limited to pharmacologic treatments, and should be complemented by appropriate non-pharmacologic interventions.

Effective COPD management should be based on an individualized assessment to reduce both current symptoms and future risks of exacerbations (Figure S1 in the Supplementary Appendix).

We propose personalization of initiating and escalating/de-escalating treatments based on the level of symptoms and an individual's risk of exacerbations. The basis for these recommendations is partially based on evidence generated in RCTs. These recommendations are intended to support clinician decision-making.

Identify and Reduce Exposure to Risk Factors

Cigarette smoking is the most commonly encountered and easily identifiable risk factor for COPD; smoking cessation should be continually encouraged for current smokers. Reduction of total personal exposure to occupational dusts, fumes, and gases, and to indoor and outdoor air pollutants, should be addressed.

Treatment of Stable COPDPharmacologic Treatment

Pharmacologic therapies can reduce symptoms, the risk and severity of exacerbations, and improve health status and exercise tolerance. The choice within each class depends on the availability of medication and the patient's response and preference (Tables 5–7).

Table 5.

Key points for the use of bronchodilators.

• LABAs and LAMAs are preferred over short-acting agents except for patients with only occasional dyspnea (Evidence A). 
• Patients may be started on single long-acting bronchodilator therapy or dual long-acting bronchodilator therapy. In patients with persistent dyspnea on one bronchodilator treatment should be escalated to two (Evidence A). 
• Inhaled bronchodilators are recommended over oral bronchodilators (Evidence A). 
• Theophylline is not recommended unless other long-term treatment bronchodilators are unavailable or unaffordable (Evidence B). 
Table 6.

Key points for the use of anti-inflammatory agents.

• Long-term monotherapy with ICS is not recommended (Evidence A). 
• Long-term treatment with ICS may be considered in association with LABAs for patients with a history of exacerbations despite appropriate treatment with long-acting bronchodilators (Evidence A). 
• Long-term therapy with oral corticosteroids is not recommended (Evidence A). 
• In patients with exacerbations despite LABA/ICS or LABA/LAMA/ICS, chronic bronchitis and severe to very severe airflow obstruction, the addition of a PDE4 inhibitor can be considered (Evidence B). 
• In former smokers with exacerbations despite appropriate therapy, macrolides can be considered (Evidence B). 
Statin therapy is not recommended for prevention of exacerbations (Evidence A). 
Antioxidant mucolytics are recommended only in selected patients (Evidence A). 
Table 7.

Key points for the use of other pharmacologic treatments.

• Patients with severe hereditary alpha-1 antitrypsin deficiency and established emphysema may be candidates for alpha-1 antitrypsin augmentation therapy (Evidence B). 
• Antitussives cannot be recommended (Evidence C). 
• Drugs approved for primary pulmonary hypertension are not recommended for patients with pulmonary hypertension secondary to COPD (Evidence B). 
• Low-dose long acting oral and parenteral opioids may be considered for treating dyspnea in COPD patients with severe disease (Evidence B). 
Pharmacologic treatment algorithms

A proposed model for the initiation, and then subsequent escalation and/or de-escalation of pharmacologic management according to the individualized assessment of symptoms and exacerbation risk is shown in Fig. 3. In past GOLD Reports, recommendations were only given for initial therapy. However, many COPD patients are already on treatment and return with persistent symptoms after initial therapy, or less commonly with resolution of some symptoms that may subsequently require less therapy. Therefore, we now suggest escalation and de-escalation strategies. The recommendations are based on available efficacy and safety data. We acknowledge that treatment escalation has not been systematically tested; trials of de-escalation are also limited and only include ICS. There is a lack of direct evidence supporting the therapeutic recommendations for patients in groups C and D. These recommendations will be re-evaluated as additional data become available.

Fig. 3.

Pharmacologic treatment algorithms by GOLD Grade [highlighted boxes and arrows indicate preferred treatment pathways].

(0.37MB).
Group A

All Group A patients should be offered a bronchodilator to reduce breathlessness. This can be either a short or a long-acting bronchodilator based on the individual patient's preference. The bronchodilator should be continued if symptomatic benefit is noted.

Group B

Initial therapy should be a long acting bronchodilator. Long-acting bronchodilators are superior to short-acting bronchodilators taken intermittently.106,221 There is no evidence to recommend one class of long-acting bronchodilators over another for symptom relief, the choice should depend on individual patient response.

For patients with persistent breathlessness on monotherapy222 the use of two bronchodilators is recommended. For patients with severe breathlessness, initial therapy with two bronchodilators may be considered.

Group C

Initial therapy should be a single long acting bronchodilator. In two head-to head comparisons112,223 the LAMA tested superior to the LABA regarding exacerbation prevention, therefore we recommend initiating a LAMA in this group.

Patients with persistent exacerbations may benefit from adding a second long acting bronchodilator (LABA/LAMA), or using a combination of a long acting beta2-agonist and an inhaled corticosteroid (LABA/ICS). As ICS increases the risk for developing pneumonia, our primary choice is LABA/LAMA.

Group D

We recommend initiating a LABA/LAMA combination because:

  • In studies with patient reported outcomes as the primary endpoint, LABA/LAMA combinations showed superior results compared to a single bronchodilator.

  • LABA/LAMA combination was superior to LABA/ICS combination in preventing exacerbations and improving other patient reported outcomes in Group D patients.

  • Group D patients are at higher risk for pneumonia when receiving ICS treatment.111,135

If a single bronchodilator is initially chosen, a LAMA is preferred for exacerbation prevention based on comparison to LABAs.

LABA/ICS may be the first choice for initial therapy in some patients. These patients may have a history and/or findings suggestive of asthma-COPD overlap and/or high blood eosinophil counts.

In patients who develop additional exacerbations on LABA/LAMA therapy we suggest two alternative pathways:

  • Escalation to LABA/LAMA/ICS.

  • Switch to LABA/ICS. If LABA/ICS therapy does not positively impact exacerbations/symptoms, a LAMA can be added.

If patients treated with LABA/LAMA/ICS still have exacerbations the following options may be considered:

  • Add roflumilast. This may be considered in patients with an FEV1<50% predicted and chronic bronchitis,224 particularly if they experienced at least one hospitalization for an exacerbation in the previous year.225

  • Add a macrolide in former smokers. The possibility of developing resistant organisms should be factored into the decision making.

  • Stopping ICS. This recommendation is supported by data that shows an elevated risk of adverse effects (including pneumonia) and no significant harm from ICS withdrawal.

Nonpharmacologic TreatmentEducation and self-management

An individual patient's evaluation and risk assessment (e.g., exacerbations, patient's needs, preferences, and personal goals) should aid the design of personalized self-management.

Pulmonary rehabilitation programs

Patients with high symptom burden and risk of exacerbations (Groups B, C and D), should take part in a full rehabilitation program that considers the individual's characteristics and comorbidities.184,226,227

Exercise training

A combination of constant load or interval training with strength training provides better outcomes than either method alone.228 Adding strength training to aerobic training is effective in improving strength, but does not improve health status or exercise tolerance.229 Upper extremity exercise training improves arm strength and endurance and improves capacity for upper extremity activities.230

Self-management education

An educational program should include smoking cessation; basic information about COPD; aspects of medical treatment (respiratory medications and inhalation devices); strategies to minimize dyspnea; advice about when to seek help; and possibly a discussion of advance directives and end-of-life issues.

End-of-life and palliative care

Patients should be informed that should they become critically ill, they or their family members may need to decide whether a course of intensive care is likely to achieve their personal goals of care. Simple, structured conversations about these possible scenarios should be discussed while patients are in their stable state.231

Nutritional support

For malnourished patients with COPD nutritional supplementation is recommended.

Vaccination

Influenza vaccination is recommended for all patients with COPD. Pneumococcal vaccinations, PCV13 and PPSV23, are recommended for all patients>65 years of age. The PPSV23 is also recommended for younger COPD patients with significant comorbid conditions including chronic heart or lung disease.232

Oxygen therapy

Long-term oxygen therapy is indicated for stable patients who have:

  • PaO2 at or below 7.3kPa (55mmHg) or SaO2 at or below 88%, with or without hypercapnia confirmed twice over a three-week period; or

  • PaO2 between 7.3kPa (55mmHg) and 8.0kPa (60mmHg), or SaO2 of 88%, if there is evidence of pulmonary hypertension, peripheral edema suggesting congestive cardiac failure, or polycythemia (hematocrit>55%).

Ventilatory support

NIV is occasionally used in patients with stable very severe COPD. NIV may be considered in a selected group of patients, particularly those with pronounced daytime hypercapnia and recent hospitalization, although contradictory evidence exists regarding its effectiveness.233 In patients with both COPD and obstructive sleep apnea continuous positive airway pressure is indicated.206

Interventional bronchoscopy and surgery

  • In selected patients with heterogeneous or homogenous emphysema and significant hyperinflation refractory to optimized medical care, surgical or bronchoscopic modes of lung volume reduction (e.g., endobronchial one-way valves or lung coils) may be considered.234

  • In selected patients with a large bulla, surgical bullectomy may be considered.

  • In selected patients with very severe COPD and without relevant contraindications, lung transplantation may be considered.

Choosing bronchoscopic lung reduction or LVRS to treat hyperinflation in an emphysematous patient depends on a number of factors that include: the extent and pattern of emphysema identified on HRCT; the presence of interlobar collateral ventilation measured by fissure integrity on HRCT or physiological assessment (endoscopic balloon occlusion and flow assessment); local proficiency in the performance of the procedures; and patient and provider preferences. An algorithm depicting the various interventions based on radiological and physiological features is shown in Fig. 4.

Fig. 4.

Interventional bronchoscopic and surgical treatments for COPD.

(0.4MB).

Criteria for referral for lung transplantation include COPD with progressive disease, not a candidate for endoscopic or surgical lung volume reduction, BODE index of 5 to 6, Pco2>50mmHg or 6.6kPa and/or Pao2<60mmHg or 8kPa, and FEV1<25% predicted.235 Recommended criteria for listing include one of the following: BODE index>7, FEV1<15-20% predicted, three or more severe exacerbations during the preceding year, one severe exacerbation with acute hypercapnic respiratory failure, or moderate to severe pulmonary hypertension.235,236

Key points for the use of non-pharmacologic treatments are summarized in Table S9 in the Supplementary Appendix.

Monitoring and Follow-Up

Routine follow-up of COPD patients is essential. Symptoms, exacerbations and objective measures of airflow limitation should be monitored to determine when to modify management and to identify any complications and/or comorbidities that may develop. In order to adjust therapy appropriately as the disease progresses, each follow-up visit should include a discussion of the current therapeutic regimen. Symptoms that indicate worsening or development of another comorbid condition should be evaluated and treated.

Management of Exacerbations

Key Points

  • An exacerbation of COPD is an acute worsening of respiratory symptoms that results in additional therapy.

  • Exacerbations can be precipitated by several factors. The most common causes are respiratory tract infections.

  • The goal for treatment of exacerbations is to minimize the negative impact of the current exacerbation and to prevent subsequent events.

  • Short-acting inhaled beta2-agonists, with or without short-acting anticholinergics, are recommended as the initial bronchodilators to treat an acute exacerbation.

  • Maintenance therapy with long-acting bronchodilators should be initiated as soon as possible before hospital discharge.

  • Systemic corticosteroids improve lung function (FEV1), oxygenation and shorten recovery time and hospitalization duration.

  • Antibiotics, when indicated, shorten recovery time, reduce the risk of early relapse, treatment failure, and hospitalization duration.

  • Methylxanthines are not recommended due to side effects.

  • Non-invasive mechanical ventilation should be the first mode of ventilation used to treat acute respiratory failure.

  • Following an exacerbation, appropriate measures for exacerbation prevention should be initiated.

Exacerbations are important events in the management of COPD because they negatively impact health status, rates of hospitalization and readmission, and disease progression.237,238 COPD exacerbations are complex events usually associated with increased airway inflammation, increased mucus production and marked gas trapping. Increased dyspnea is the key symptom of an exacerbation. Other symptoms include increased sputum purulence and volume, together with increased cough and wheeze.239 As comorbidities are common in COPD patients, exacerbations must be differentiated from acute coronary syndrome, worsening congestive heart failure, pulmonary embolism and pneumonia.

COPD exacerbations are classified as:

  • Mild (treated with short acting bronchodilators only, SABDs)

  • Moderate (treated with SABDs plus antibiotics and/or oral corticosteroids) or

  • Severe (patient requires hospitalization or visits the emergency room). Severe exacerbations may be associated with acute respiratory failure.

Exacerbations are mainly triggered by respiratory viral infections although bacterial infections and environmental factors may also initiate and/or amplify these events.240

Exacerbations can be associated with increased sputum production and, if purulent, increased bacteria may be found in the sputum239,241,242 Some evidence supports the concept that eosinophils are increased in the airways, lung, and blood in a significant proportion of patients with COPD. Exacerbations associated with an increase in sputum or blood eosinophils may be more responsive to systemic steroids243 although more prospective data are needed.243

Symptoms usually last between 7 to 10 days during an exacerbation, but some events may last longer. At 8 weeks, 20% of patients have not recovered to their pre-exacerbation state.244 COPD exacerbations increase susceptibility to additional events.59,245

COPD patients susceptible to frequent exacerbations (defined as ≥ 2 exacerbations per year) have worse health status and morbidity than patients with less frequent exacerbations.238 Other factors associated with an increased risk of acute exacerbations and/or severity of exacerbations include an increase in the ratio of the pulmonary artery to aorta cross sectional dimension (i.e., ratio>1),246 a greater percentage of emphysema or airway wall thickness247 measured by chest CT imaging and the presence of chronic bronchitis.248,249

Treatment OptionsTreatment Setting

The goals of exacerbation treatment are to minimize the negative impact of the current exacerbation, and to prevent the development of subsequent events.250 Depending on the severity of an exacerbation and/or the severity of the underlying disease, an exacerbation can be managed in either the outpatient or inpatient setting. More than 80% of exacerbations are managed on an outpatient basis with bronchodilators, corticosteroids, and antibiotics.251–253

The indications for hospitalization during a COPD exacerbation are shown in Table S10 in the Supplementary Appendix. When patients with a COPD exacerbation come to the emergency department, they should be given supplemental oxygen and assessed to determine whether the exacerbation is life-threatening and requires consideration for non-invasive ventilation and ICU or respiratory unit hospitalization.

Long-term prognosis following hospitalization for COPD exacerbation is poor; five-year mortality rate is about 50%.254 Factors associated with poor outcome include older age, lower body mass index, comorbidities (e.g., cardiovascular disease or lung cancer), previous hospitalizations for COPD exacerbations, clinical severity of the index exacerbation, and need for long-term oxygen therapy at discharge.255,256 Patients with a higher prevalence and severity of respiratory symptoms, poorer quality of life, worse lung function, lower exercise capacity, lower lung density and thickened bronchial walls on CT-scan are at increased mortality risk following an acute exacerbation.257

Key points for the management of all exacerbations are given in Table 8.

Table 8.

Key points for the management of exacerbations.

• Short-acting inhaled beta2-agonists, with or without short-acting anticholinergics, are recommended as the initial bronchodilators to treat an acute exacerbation (Evidence C)
• Systemic corticosteroids improve lung function (FEV1), oxygenation and shorten recovery time and hospitalization duration. Duration of therapy should not be more than 5-7 days (Evidence A)
• Antibiotics, when indicated, can shorten recovery time, reduce the risk of early relapse, treatment failure, and hospitalization duration. Duration of therapy should be 5-7 days (Evidence B)
• Methylxanthines are not recommended due to increased side effect profiles (Evidence B)
• NIV should be the first mode of ventilation used in COPD patients with acute respiratory failure who have no absolute contraindication because it improves gas exchange, reduces work of breathing and the need for intubation, decreases hospitalization duration and improves survival (Evidence A)
Pharmacologic Treatment

The most commonly used classes of medications for COPD exacerbations are bronchodilators, corticosteroids, and antibiotics.

Bronchodilators. Short-acting inhaled beta2-agonists, with or without short-acting anticholinergics, are the initial bronchodilators recommended for acute treatment of exacerbations.258,259 There are no significant differences in FEV1 when using metered dose inhalers (MDI) (with or without a spacer device) or nebulizers to deliver the agent,260 although the latter may be an easier delivery method for sicker patients. Intravenous methylxanthines are not recommended due to side effects.261,262

Glucocorticoids. Systemic glucocorticoids in COPD exacerbations shorten recovery time and improve FEV1. They also improve oxygenation,263–266 the risk of early relapse, treatment failure,267 and the length of hospitalization.263,265,268 A dose of 40mg prednisone per day for 5 days is recommended.269 Therapy with oral prednisolone is equally effective to intravenous administration.270 Glucocorticoids may be less efficacious to treat exacerbations in patients with lower blood eosinophil levels.59,243,271

Antibiotics. The use of antibiotics in exacerbations remains controversial.272–274 Evidence supports the use of antibiotics in patients with exacerbations and increased sputum purulence.273,274 One review reported that antibiotics reduce the risk of short-term mortality by 77%, treatment failure by 53% and sputum purulence by 44%275 Procalcitonin-guided antibiotic treatment may reduce antibiotic exposure and side effects with the same clinical efficacy.276,277 A study in patients with exacerbations requiring mechanical ventilation (invasive or noninvasive) reported increased mortality and a higher incidence of secondary nosocomial pneumonia when antibitoics were not given.278 Antibiotics should be given to patients with acute exacerbations who have three cardinal symptoms: increase in dyspnea, sputum volume, and sputum purulence; have two of the cardinal symptoms, if increased purulence of sputum is one of the two symptoms; or require mechanical ventilation (invasive or noninvasive).239,240 The recommended length of antibiotic therapy is 5-7 days.279

Antibiotic choice should be based on the local bacterial resistance pattern. Usual initial empirical treatment is an aminopenicillin with clavulanic acid, a macrolide, or a tetracycline. In patients with frequent exacerbations, severe airflow limitation,280,281 and/or exacerbations requiring mechanical ventilation,282 cultures from sputum or other materials from the lung should be performed to identify the presence of resistant pathogens. Administration route depends on the patient's ability to eat and the pharmacokinetics of the antibiotic.

Respiratory Support

Oxygen therapy. Supplemental oxygen should be titrated to improve hypoxemia with a target saturation of 88-92%.283 Once oxygen is started, blood gases should be checked to ensure satisfactory oxygenation without carbon dioxide retention and/or worsening acidosis.

Ventilatory support. Some patients require admission to the intensive care unit. Admission of patients with severe exacerbations to intermediate or special respiratory care units may be appropriate if adequate personnel skills and equipment exist to manage acute respiratory failure.

Noninvasive mechanical ventilation. NIV is preferred over invasive ventilation as the initial mode of ventilation to treat acute respiratory failure in patients hospitalized for acute exacerbations of COPD. NIV has been studied in RCTs showing a success rate of 80-85%.284–288 Mortality and intubation rates are reduced by NIV.284,289–291

Invasive mechanical ventilation. The indication for initiating invasive mechanical ventilation during an exacerbation includes failure of an initial trial of NIV.292 In patients who fail non-invasive ventilation as initial therapy and receive invasive ventilation as subsequent rescue therapy, morbidity, hospital length of stay and mortality are greater.287

Hospital Discharge and Follow-Up

Lack of spirometric assessment and arterial blood gas analysis have been associated with re-hospitalization and mortality.293 Mortality relates to patient age, the presence of acidotic respiratory failure, the need for ventilatory support and comorbidities including anxiety and depression.294

The introduction of care bundles at hospital discharge to include education, optimization of medication, supervision and correction of inhaler technique, assessment and optimal management of comorbidities, early rehabilitation, telemonitoring and continued patient contact have been investigated.295 There is insufficient data that they influence readmission rates, short-term mortality293,294,296,297 or cost-effectiveness.294

Early follow-up (< 30 days) following discharge should be undertaken when possible and has been related to less exacerbation-related readmissions.186,298 Early follow-up permits a careful review of discharge therapy and an opportunity to make changes in therapy. Patients not attending early follow-up have increased 90-day mortality.

Additional follow-up at three months is recommended to ensure return to a stable state and review of patient's symptoms, lung function (by spirometry), and when possible the assessment of prognosis using multiple scoring systems such as BODE.298,299 An assessment of the presence and management of comorbidities should also be undertaken (Table S11 in the Supplementary Appendix).300

Prevention of Exacerbations

After an acute exacerbation, measures for prevention of further exacerbations should be initiated (Table S12 in the Supplementary Appendix).

COPD and Comorbidities

Key Points

  • COPD often coexists with other diseases (comorbidities) that may significantly impact patient outcome.

  • The presence of comorbidities should not alter COPD treatment and comorbidities should be treated per usual standards regardless of the presence of COPD.

  • When COPD is part of a multi-morbidity care plan, attention should be directed to ensure simplicity of treatment and minimize polypharmacy.

COPD often coexists with other diseases (comorbidities) that may have a significant impact on prognosis.63,301–307 Some of these arise independently of COPD whereas others may be causally related, either with shared risk factors, or by one disease increasing the risk or compounding the severity of the other.308 Management of the COPD patient must include identification and treatment of its comorbidities; the most common in COPD are outlined below.

Cardiovascular diseaseHeart failure

The prevalence of systolic or diastolic heart failure in COPD patients ranges from 20 to 70%.309 Unrecognized heart failure may mimic or accompany acute exacerbations of COPD; 40% of COPD patients that are mechanically ventilated because of hypercapnic respiratory failure have evidence of left ventricular dysfunction.310,311 Treatment with ß1-blockers improves survival in chronic heart failure and is recommended. Selective ß1-blockers should be used.312

Ischemic heart disease

There is an increased risk of myocardial damage in patients with concomitant ischemic heart disease who have an acute exacerbation of COPD. Patients who demonstrate abnormal cardiac troponins are at an increased risk of adverse outcomes including short-term (30 day) and long-term mortality.313

Arrhythmias

Cardiac arrhythmias are common in COPD and vice versa. Atrial fibrillation is frequent and directly associated with FEV1. Bronchodilators have been previously described as potentially pro-arrhythmic agents314,315; however, evidence suggests an overall acceptable safety profile for long-acting beta2-agonists,316 anticholinergic drugs (and inhaled corticosteroids).103,115,253,317–322

Peripheral vascular disease

In a large cohort of patients with COPD of all degrees of severity, 8.8% were diagnosed with peripheral artery disease (PAD) that was higher than the prevalence in non-COPD controls (1.8%).323 COPD patients with PAD reported a worse functional capacity and worse health status compared to those without PAD.

Hypertension

Hypertension is likely to be the most frequently occurring comorbidity in COPD and may have implications for prognosis.308,324

Osteoporosis

Osteoporosis is often associated with emphysema,325,326 decreased body mass index327 and low fat-free mass.328 Low bone mineral density and fractures are common in COPD patients even after adjustment for steroid use, age, pack-years of smoking, current smoking, and exacerbations.329,330 An association between inhaled corticosteroids and fractures has been found in pharmaco-epidemiological studies. Systemic corticosteroids significantly increase the risk of osteoporosis.

Anxiety and Depression

Anxiety and depression are both associated with a poor prognosis.331,332

COPD and Lung Cancer

The association between emphysema and lung cancer is stronger than between airflow limitation and lung cancer.333–335 Increased age and greater smoking history further increases risk.336 Two studies of low-dose chest computed tomography (LDCT) screening report improved survival in subjects aged 55-74 years, current smokers or those who quit within the previous 15 years, with a smoking history of at least 30 pack-years.337,338 LDCT is now recommended in the U.S. for patients meeting these demographics; however, this is not a worldwide practice.

Metabolic Syndrome and Diabetes

Metabolic syndrome and diabetes are more frequent in COPD and the latter is likely to affect prognosis.302 The prevalence of metabolic syndrome has been estimated to be more than 30%.339

Gastroesophageal Reflux

Gastroesophageal reflux is an independent risk factor for exacerbations and is associated with worse health status.251,340,341

Bronchiectasis

Bronchiectasis is associated with longer exacerbations342 and increased mortality.300

Obstructive Sleep Apnea

Patients with “overlap syndrome” (COPD and OSA) have a worse prognosis compared with COPD or OSA. Apneic events in patients with OSA and COPD have more profound hypoxemia and more cardiac arrhythmias343 and are more likely to develop daytime pulmonary hypertension344,345 than patients with just OSA or COPD alone.

Conflict of Interests

The conflict of interest statement of the authors (GOLD-Disclosures-Authors) is available in the additional material of this article in its electronic version, at doi:10.1016/j.arbres.2017.02.001.

References
[1]
P.G. Woodruff, R.G. Barr, E. Bleecker, et al.
Clinical Significance of Symptoms in Smokers with Preserved Pulmonary Function.
N Engl J Med, 374 (2016), pp. 1811-1821
[2]
E.A. Regan, D.A. Lynch, D. Curran-Everett, et al.
Clinical and Radiologic Disease in Smokers With Normal Spirometry.
JAMA Intern Med, 175 (2015), pp. 1539-1549
[3]
B. Lamprecht, M.A. McBurnie, W.M. Vollmer, et al.
COPD in never smokers: results from the population-based burden of obstructive lung disease study.
Chest, 139 (2011), pp. 752-763
[4]
M. Thomsen, B.G. Nordestgaard, J. Vestbo, P. Lange.
Characteristics and outcomes of chronic obstructive pulmonary disease in never smokers in Denmark: a prospective population study.
The Lancet Respiratory medicine, 1 (2013), pp. 543-550
[5]
D.J. Barker, K.M. Godfrey, C. Fall, C. Osmond, P.D. Winter, S.O. Shaheen.
Relation of birth weight and childhood respiratory infection to adult lung function and death from chronic obstructive airways disease.
BMJ, 303 (1991), pp. 671-675
[6]
T. Todisco, F.M. de Benedictis, L. Iannacci, et al.
Mild prematurity and respiratory functions.
Eur J Pediatr, 152 (1993), pp. 55-58
[7]
D.A. Stern, W.J. Morgan, A.L. Wright, S. Guerra, F.D. Martinez.
Poor airway function in early infancy and lung function by age 22 years: a non-selective longitudinal cohort study.
[8]
D.A. Lawlor, S. Ebrahim, G. Davey Smith.
Association of birth weight with adult lung function: findings from the British Women's Heart and Health Study and a meta-analysis.
Thorax, 60 (2005), pp. 851-858
[9]
R. Kohansal, P. Martinez-Camblor, A. Agusti, A.S. Buist, D.M. Mannino, J.B. Soriano.
The natural history of chronic airflow obstruction revisited: an analysis of the Framingham offspring cohort.
Am J Respir Crit Care Med, 180 (2009), pp. 3-10
[10]
D. Raad, S. Gaddam, H.J. Schunemann, et al.
Effects of water-pipe smoking on lung function: a systematic review and meta-analysis.
Chest, 139 (2011), pp. 764-774
[11]
J. She, P. Yang, Y. Wang, et al.
Chinese water-pipe smoking and the risk of COPD.
Chest, 146 (2014), pp. 924-931
[12]
H. Gunen, H. Tarraf, A. Nemati, M. Al Ghobain, S. Al Mutairi, Z. Aoun Bacah.
Waterpipe tobacco smoking.
Tuberk Toraks, 64 (2016), pp. 94-96
[13]
W.C. Tan, C. Lo, A. Jong, et al.
Marijuana and chronic obstructive lung disease: a population-based study.
CMAJ, 180 (2009), pp. 814-820
[14]
P. Yin, C.Q. Jiang, K.K. Cheng, et al.
Passive smoking exposure and risk of COPD among adults in China: the Guangzhou Biobank Cohort Study.
[15]
I.B. Tager, L. Ngo, J.P. Hanrahan.
Maternal smoking during pregnancy. Effects on lung function during the first 18 months of life.
Am J Respir Crit Care Med, 152 (1995), pp. 977-983
[16]
L.M. Paulin, G.B. Diette, P.D. Blanc, et al.
Occupational exposures are associated with worse morbidity in patients with chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 191 (2015), pp. 557-565
[17]
M.D. Eisner, N. Anthonisen, D. Coultas, et al.
An official American Thoracic Society public policy statement: Novel risk factors and the global burden of chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 182 (2010), pp. 693-718
[18]
M. Orozco-Levi, J. Garcia-Aymerich, J. Villar, A. Ramirez-Sarmiento, J.M. Anto, J. Gea.
Wood smoke exposure and risk of chronic obstructive pulmonary disease.
Eur Respir J, 27 (2006), pp. 542-546
[19]
W.Q. Gan, J.M. FitzGerald, C. Carlsten, M. Sadatsafavi, M. Brauer.
Associations of ambient air pollution with chronic obstructive pulmonary disease hospitalization and mortality.
Am J Respir Crit Care Med, 187 (2013), pp. 721-727
[20]
M. Ezzati.
Indoor air pollution and health in developing countries.
[21]
Y. Zhou, Y. Zou, X. Li, et al.
Lung function and incidence of chronic obstructive pulmonary disease after improved cooking fuels and kitchen ventilation: a 9-year prospective cohort study.
PLoS Med, 11 (2014), pp. e1001621
[22]
G.E. Silva, D.L. Sherrill, S. Guerra, R.A. Barbee.
Asthma as a risk factor for COPD in a longitudinal study.
Chest, 126 (2004), pp. 59-65
[23]
B. Rijcken, J.P. Schouten, S.T. Weiss, F.E. Speizer, R. van der Lende.
The relationship of nonspecific bronchial responsiveness to respiratory symptoms in a random population sample.
Am Rev Respir Dis, 136 (1987), pp. 62-68
[24]
J.J. Hospers, D.S. Postma, B. Rijcken, S.T. Weiss, J.P. Schouten.
Histamine airway hyper-responsiveness and mortality from chronic obstructive pulmonary disease: a cohort study.
Lancet, 356 (2000), pp. 1313-1317
[25]
D.P. Tashkin, M.D. Altose, J.E. Connett, R.E. Kanner, W.W. Lee, R.A. Wise.
Methacholine reactivity predicts changes in lung function over time in smokers with early chronic obstructive pulmonary disease. The Lung Health Study Research Group.
Am J Respir Crit Care Med, 153 (1996), pp. 1802-1811
[26]
R. de Marco, S. Accordini, A. Marcon, et al.
Risk factors for chronic obstructive pulmonary disease in a European cohort of young adults.
Am J Respir Crit Care Med, 183 (2011), pp. 891-897
[27]
M.B. Drummond, G.D. Kirk.
HIV-associated obstructive lung diseases: insights and implications for the clinician.
The Lancet Respiratory medicine, 2 (2014), pp. 583-592
[28]
A.M. Menezes, P.C. Hallal, R. Perez-Padilla, et al.
Tuberculosis and airflow obstruction: evidence from the PLATINO study in Latin America.
Eur Respir J, 30 (2007), pp. 1180-1185
[29]
T.S. Jordan, E.M. Spencer, P. Davies.
Tuberculosis, bronchiectasis and chronic airflow obstruction.
Respirology, 15 (2010), pp. 623-628
[30]
A.L. Byrne, B.J. Marais, C.D. Mitnick, L. Lecca, G.B. Marks.
Tuberculosis and chronic respiratory disease: a systematic review.
International journal of infectious diseases: IJID: official publication of the International Society for Infectious Diseases, 32 (2015), pp. 138-146
[31]
A.S. Buist, M.A. McBurnie, W.M. Vollmer, et al.
International variation in the prevalence of COPD (the BOLD Study): a population-based prevalence study.
[32]
M. Miravitlles, H. Worth, J.J. Soler Cataluna, et al.
Observational study to characterise 24-hour COPD symptoms and their relationship with patient-reported outcomes: results from the ASSESS study.
Respir Res, 15 (2014), pp. 122
[33]
M.W. Elliott, L. Adams, A. Cockcroft, K.D. MacRae, K. Murphy, A. Guz.
The language of breathlessness. Use of verbal descriptors by patients with cardiopulmonary disease.
Am Rev Respir Dis, 144 (1991), pp. 826-832
[34]
Medical Research Council Committee on the Aetiology of Chronic Bronchitis.
Definition and classification of chronic bronchitis for clinical and epidemiological purposes. A report to the Medical Research Council by their Committee on the Aetiology of Chronic Bronchitis.
Lancet, 1 (1965), pp. 775-779
[35]
S. von Haehling, S.D. Anker.
Cachexia as a major underestimated and unmet medical need: facts and numbers.
Journal of cachexia, sarcopenia and muscle, 1 (2010), pp. 1-5
[36]
A.M. Schols, P.B. Soeters, A.M. Dingemans, R. Mostert, P.J. Frantzen, E.F. Wouters.
Prevalence and characteristics of nutritional depletion in patients with stable COPD eligible for pulmonary rehabilitation.
Am Rev Respir Dis, 147 (1993), pp. 1151-1156
[37]
D.R. Holleman Jr., D.L. Simel.
Does the clinical examination predict airflow limitation?.
Jama, 273 (1995), pp. 313-319
[38]
S. Kesten, K.R. Chapman.
Physician perceptions and management of COPD.
Chest, 104 (1993), pp. 254-258
[39]
W. van Dijk, W. Tan, P. Li, et al.
Clinical relevance of fixed ratio vs lower limit of normal of FEV1/FVC in COPD: patient-reported outcomes from the CanCOLD cohort.
Annals of family medicine, 13 (2015), pp. 41-48
[40]
G. Guder, S. Brenner, C.E. Angermann, et al.
GOLD or lower limit of normal definition?. A comparison with expert-based diagnosis of chronic obstructive pulmonary disease in a prospective cohort-study”.
Respir Res, 13 (2012), pp. 13
[41]
C.A. Vaz Fragoso, G. McAvay, P.H. Van Ness, et al.
Phenotype of normal spirometry in an aging population.
Am J Respir Crit Care Med, 192 (2015), pp. 817-825
[42]
C.A. Vaz Fragoso, G. McAvay, P.H. Van Ness, et al.
Phenotype of Spirometric Impairment in an Aging Population.
Am J Respir Crit Care Med, 193 (2016), pp. 727-735
[43]
P. Albert, A. Agusti, L. Edwards, et al.
Bronchodilator responsiveness as a phenotypic characteristic of established chronic obstructive pulmonary disease.
[44]
J.E. Hansen, J. Porszasz, Counterpoint:.
Is an increase in FEV(1) and/or FVC>/= 12% of control and >/= 200mL the best way to assess positive bronchodilator response?.
No. Chest, 146 (2014), pp. 538-541
[45]
K. Hill, R.S. Goldstein, G.H. Guyatt, et al.
Prevalence and underdiagnosis of chronic obstructive pulmonary disease among patients at risk in primary care.
CMAJ, 182 (2010), pp. 673-678
[46]
M.V. Lopez Varela, M. Montes de Oca, A. Rey, et al.
Development of a simple screening tool for opportunistic COPD case finding in primary care in Latin America: The PUMA study.
Respirology, 21 (2016), pp. 1227-1234
[47]
J.A. Dirven, H.J. Tange, J.W. Muris, K.M. van Haaren, G. Vink, O.C. van Schayck.
Early detection of COPD in general practice: implementation, workload and socioeconomic status. A mixed methods observational study.
Prim Care Respir J, 22 (2013), pp. 338-343
[48]
C.M. Fletcher.
Standardised questionnaire on respiratory symptoms: a statement prepared and approved by the MRC Committee on the Aetiology of Chronic Bronchitis (MRC breathlessness score).
BMJ, 2 (1960), pp. 1662
[49]
J.C. Bestall, E.A. Paul, R. Garrod, R. Garnham, P.W. Jones, J.A. Wedzicha.
Usefulness of the Medical Research Council (MRC) dyspnoea scale as a measure of disability in patients with chronic obstructive pulmonary disease.
Thorax, 54 (1999), pp. 581-586
[50]
J. Sundh, C. Janson, K. Lisspers, B. Stallberg, S. Montgomery.
The Dyspnoea, Obstruction, Smoking, Exacerbation (DOSE) index is predictive of mortality in COPD.
Prim Care Respir J, 21 (2012), pp. 295-301
[51]
K. Nishimura, T. Izumi, M. Tsukino, T. Oga.
Dyspnea is a better predictor of 5-year survival than airway obstruction in patients with COPD.
Chest, 121 (2002), pp. 1434-1440
[52]
P.W. Jones.
Health status measurement in chronic obstructive pulmonary disease.
Thorax, 56 (2001), pp. 880-887
[53]
G.H. Guyatt, L.B. Berman, M. Townsend, S.O. Pugsley, L.W. Chambers.
A measure of quality of life for clinical trials in chronic lung disease.
Thorax, 42 (1987), pp. 773-778
[54]
P.W. Jones, F.H. Quirk, C.M. Baveystock, P. Littlejohns.
A self-complete measure of health status for chronic airflow limitation. The St. George's Respiratory Questionnaire.
Am Rev Respir Dis, 145 (1992), pp. 1321-1327
[55]
A. Agusti, P.M. Calverley, B. Celli, et al.
Characterisation of COPD heterogeneity in the ECLIPSE cohort.
Respir Res, 11 (2010), pp. 122
[56]
K. Nishimura, S. Mitsuma, A. Kobayashi, et al.
COPD and disease-specific health status in a working population.
Respir Res, 14 (2013), pp. 61
[57]
M. Miravitlles, J. Soriano, F. Garcia-Rio, et al.
Prevalence of COPD in Spain: impact of undiagnosed COPD on quality of life and daily life activities.
Thorax, 64 (2009), pp. 863-868
[58]
P.W. Jones, M. Tabberer, W.H. Chen.
Creating scenarios of the impact of COPD and their relationship to COPD Assessment Test (CAT) scores.
BMC Pulm Med, 11 (2011), pp. 42
[59]
J.R. Hurst, J. Vestbo, A. Anzueto, et al.
Susceptibility to exacerbation in chronic obstructive pulmonary disease.
N Engl J Med, 363 (2010), pp. 1128-1138
[60]
J.J. Soler-Cataluna, M.A. Martinez-Garcia, P. Roman Sanchez, E. Salcedo, M. Navarro, R. Ochando.
Severe acute exacerbations and mortality in patients with chronic obstructive pulmonary disease.
Thorax, 60 (2005), pp. 925-931
[61]
S. Pascoe, N. Locantore, M. Dransfield, N.C. Barnes, I.D. Pavord.
Blood eosiophil counts, exacerbations, and response to the addition of inhaled fluticasone furoate to vilanterol in patients with chronic obstructive pulmonary disease: a secondary analysis of data from two parrallel randomised controlled trials.
Lancet Respiratory Medicine, 3 (2015), pp. 435-442
[62]
S.H. Siddiqui, A. Guasconi, J. Vestbo, et al.
Blood Eosinophils: A Biomarker of Response to Extrafine Beclomethasone/Formoterol in Chronic Obstructive Pulmonary Disease.
Am J Respir Crit Care Med, 192 (2015), pp. 523-525
[63]
J.B. Soriano, G.T. Visick, H. Muellerova, N. Payvandi, A.L. Hansell.
Patterns of comorbidities in newly diagnosed COPD and asthma in primary care.
Chest, 128 (2005), pp. 2099-2107
[64]
National Institute for Health and Care Excellence Multimorbidity: clinical assessment and management, in press. 2016. https://www.nice.org.uk/guidance/indevelopment/gid-cgwave0704/documents (accessed 1 August 2016).
[65]
L.E. Vanfleteren, M.A. Spruit, M. Groenen, et al.
Clusters of comorbidities based on validated objective measurements and systemic inflammation in patients with chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 187 (2013), pp. 728-735
[66]
J.B. Soriano, B. Lamprecht, A.S. Ramirez, et al.
Mortality prediction in chronic obstructive pulmonary disease comparing the GOLD 2007 and 2011 staging systems: a pooled analysis of individual patient data.
The Lancet Respiratory medicine, 3 (2015), pp. 443-450
[67]
L.M. Goossens, I. Leimer, N. Metzdorf, K. Becker, M.P. Rutten-van Molken.
Does the 2013 GOLD classification improve the ability to predict lung function decline, exacerbations and mortality: a post-hoc analysis of the 4-year UPLIFT trial.
BMC Pulm Med, 14 (2014), pp. 163
[68]
J. Kim, H.I. Yoon, Y.M. Oh, et al.
Lung function decline rates according to GOLD group in patients with chronic obstructive pulmonary disease.
Int J Chron Obstruct Pulmon Dis, 10 (2015), pp. 1819-1827
[69]
M.K. Han, H. Muellerova, D. Curran-Everett, et al.
GOLD 2011 disease severity classification in COPDGene: a prospective cohort study.
The Lancet Respiratory medicine, 1 (2013), pp. 43-50
[70]
WHO meeting participants.
Alpha 1-antitrypsin deficiency: memorandum from a WHO meeting.
Bull World Health Organ, 75 (1997), pp. 397-415
[71]
B.R. Celli, C.G. Cote, J.M. Marin, et al.
The body-mass index, airflow obstruction, dyspnea, and exercise capacity index in chronic obstructive pulmonary disease.
N Engl J Med, 350 (2004), pp. 1005-1012
[72]
R.C. Jones, G.C. Donaldson, N.H. Chavannes, et al.
Derivation and validation of a composite index of severity in chronic obstructive pulmonary disease: the DOSE Index.
Am J Respir Crit Care Med, 180 (2009), pp. 1189-1195
[73]
M.A. Puhan, J. Garcia-Aymerich, M. Frey, et al.
Expansion of the prognostic assessment of patients with chronic obstructive pulmonary disease: the updated BODE index and the ADO index.
[74]
E.A. van Eerd, R.M. van der Meer, O.C. van Schayck, D. Kotz.
Smoking cessation for people with chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, (2016), pp. CD010744
[75]
The tobacco use and dependence clinical practice guideline panel, staff, and consortium representatives.
A clinical practice guideline for treating tobacco use and dependence.
JAMA, 28 (2000), pp. 3244-3254
[76]
R.M. van der Meer, E.J. Wagena, R.W. Ostelo, J.E. Jacobs, C.P. van Schayck.
Smoking cessation for chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, (2003), pp. CD002999
[77]
A clinical practice guideline for treating tobacco use and dependence: 2008 update. A U.S. Public Health Service report.
American journal of preventive medicine, 35 (2008), pp. 158-176
[78]
A. McNeill, L.S. Brose, R. Calder, S.C. Hitchman.
E-cigarettes: an evidence update. A report commissioned by Public Health England.: Public Health England;.
(2015),
[79]
H. McRobbie, C. Bullen, J. Hartmann-Boyce, P. Hajek.
Electronic cigarettes for smoking cessation and reduction.
Cochrane Database Syst Rev, 12 (2014), pp. CD010216
[80]
S. Kalkhoran, S.A. Glantz.
E-cigarettes and smoking cessation - Authors’ reply.
The Lancet Respiratory medicine, 4 (2016), pp. e26-e27
[81]
M. Malas, J. van der Tempel, R. Schwartz, et al.
Electronic Cigarettes for Smoking Cessation: A Systematic Review.
Nicotine Tob Res, 18 (2016), pp. 1926-1936
[82]
E. Beard, R. West, S. Michie, J. Brown.
Association between electronic cigarette use and changes in quit attempts, success of quit attempts, use of smoking cessation pharmacotherapy, and use of stop smoking services in England: time series analysis of population trends.
Bmj, 354 (2016), pp. i4645
[83]
D.P. Tashkin, S. Rennard, J.T. Hays, W. Ma, D. Lawrence, T.C. Lee.
Effects of varenicline on smoking cessation in patients with mild to moderate COPD: a randomized controlled trial.
Chest, 139 (2011), pp. 591-599
[84]
D. Tashkin, R. Kanner, W. Bailey, et al.
Smoking cessation in patients with chronic obstructive pulmonary disease: a double-blind, placebo-controlled, randomised trial.
Lancet, 357 (2001), pp. 1571-1575
[85]
K. Cahill, S. Stevens, R. Perera, T. Lancaster.
Pharmacological interventions for smoking cessation: an overview and network meta-analysis.
Cochrane Database Syst Rev, 5 (2013), pp. CD009329
[86]
The Tobacco Use and Dependence Clinical Practice Guideline Panel.
A clinical practice guideline for treating tobacco use and dependence: A US Public Health Service report.
JAMA, 283 (2000), pp. 3244-3254
[87]
The Tobacco Use and Dependence Clinical Practice Guideline Panel.
A clinical practice guideline for treating tobacco use and dependence.
JAMA, 28 (2000), pp. 3244-3254
[88]
T. Glynn, M. Manley.
How to help your patients stop smoking.
A National Cancer Institute manual for physicians.,
[89]
L.F. Stead, D. Buitrago, N. Preciado, G. Sanchez, J. Hartmann-Boyce, T. Lancaster.
Physician advice for smoking cessation.
Cochrane Database Syst Rev, 5 (2013), pp. CD000165
[90]
L.F. Stead, P. Koilpillai, T.R. Fanshawe, T. Lancaster.
Combined pharmacotherapy and behavioural interventions for smoking cessation.
Cochrane Database Syst Rev, 3 (2016), pp. CD008286
[91]
P. Wongsurakiat, K.N. Maranetra, C. Wasi, U. Kositanont, W. Dejsomritrutai, S. Charoenratanakul.
Acute respiratory illness in patients with COPD and the effectiveness of influenza vaccination: a randomized controlled study.
Chest, 125 (2004), pp. 2011-2020
[92]
P.J. Poole, E. Chacko, R.W. Wood-Baker, C.J. Cates.
Influenza vaccine for patients with chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, (2006), pp. CD002733
[93]
P. Wongsurakiat, J. Lertakyamanee, K.N. Maranetra, S. Jongriratanakul, S. Sangkaew.
Economic evaluation of influenza vaccination in Thai chronic obstructive pulmonary disease patients.
J Med Assoc Thai, 86 (2003), pp. 497-508
[94]
K.L. Nichol, K.L. Margolis, J. Wuorenma, T. Von Sternberg.
The efficacy and cost effectiveness of vaccination against influenza among elderly persons living in the community.
N Engl J Med, 331 (1994), pp. 778-784
[95]
A.E. Fiore, D.K. Shay, K. Broder, et al.
Prevention and control of seasonal influenza with vaccines: recommendations of the Advisory Committee on Immunization Practices (ACIP), 2009.
MMWR Recomm Rep, 58 (2009), pp. 1-52
[96]
C.L. Huang, P.A. Nguyen, P.L. Kuo, U. Iqbal, Y.H. Hsu, W.S. Jian.
Influenza vaccination and reduction in risk of ischemic heart disease among chronic obstructive pulmonary elderly.
Comput Methods Programs Biomed, 111 (2013), pp. 507-511
[97]
K.M. Edwards, W.D. Dupont, M.K. Westrich, W.D. Plummer Jr., P.S. Palmer, P.F. Wright.
A randomized controlled trial of cold-adapted and inactivated vaccines for the prevention of influenza A disease.
J Infect Dis, 169 (1994), pp. 68-76
[98]
E. Hak, G.A. van Essen, E. Buskens, W. Stalman, R.A. de Melker.
Is immunising all patients with chronic lung disease in the community against influenza cost effective?. Evidence from a general practice based clinical prospective cohort study in Utrecht, The Netherlands.
J Epidemiol Community Health, 52 (1998), pp. 120-125
[99]
P.S. Burge, P.M. Calverley, P.W. Jones, S. Spencer, J.A. Anderson, T.K. Maslen.
Randomised, double blind, placebo controlled study of fluticasone propionate in patients with moderate to severe chronic obstructive pulmonary disease: the ISOLDE trial.
BMJ, 320 (2000), pp. 1297-1303
[100]
N.R. Anthonisen, J.E. Connett, J.P. Kiley, et al.
Effects of smoking intervention and the use of an inhaled anticholinergic bronchodilator on the rate of decline of FEV1.
The Lung Health Study. JAMA, 272 (1994), pp. 1497-1505
[101]
R.A. Pauwels, C.G. Lofdahl, L.A. Laitinen, et al.
Long-term treatment with inhaled budesonide in persons with mild chronic obstructive pulmonary disease who continue smoking. European Respiratory Society Study on Chronic Obstructive Pulmonary Disease.
N Engl J Med, 340 (1999), pp. 1948-1953
[102]
J. Vestbo, T. Sorensen, P. Lange, A. Brix, P. Torre, K. Viskum.
Long-term effect of inhaled budesonide in mild and moderate chronic obstructive pulmonary disease: a randomised controlled trial.
Lancet, 353 (1999), pp. 1819-1823
[103]
D.P. Tashkin, B. Celli, S. Senn, et al.
A 4-year trial of tiotropium in chronic obstructive pulmonary disease.
N Engl J Med, 359 (2008), pp. 1543-1554
[104]
D.E. O’Donnell, T. Fluge, F. Gerken, et al.
Effects of tiotropium on lung hyperinflation, dyspnoea and exercise tolerance in COPD.
Eur Respir J, 23 (2004), pp. 832-840
[105]
D.E. O’Donnell, F. Sciurba, B. Celli, et al.
Effect of fluticasone propionate/salmeterol on lung hyperinflation and exercise endurance in COPD.
Chest, 130 (2006), pp. 647-656
[106]
S. Appleton, T. Jones, P. Poole, et al.
Ipratropium bromide versus long-acting beta-2 agonists for stable chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, (2006), pp. Cd006101
[107]
C. Karner, J. Chong, P. Poole.
Tiotropium versus placebo for chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, 7 (2014), pp. CD009285
[108]
A.S. Melani.
Long-acting muscarinic antagonists.
Expert Rev Clin Pharmacol, 8 (2015), pp. 479-501
[109]
S. Kesten, R. Casaburi, D. Kukafka, C.B. Cooper.
Improvement in self-reported exercise participation with the combination of tiotropium and rehabilitative exercise training in COPD patients.
Int J Chron Obstruct Pulmon Dis, 3 (2008), pp. 127-136
[110]
R. Casaburi, D. Kukafka, C.B. Cooper, T.J. Witek Jr., S. Kesten.
Improvement in exercise tolerance with the combination of tiotropium and pulmonary rehabilitation in patients with COPD.
Chest, 127 (2005), pp. 809-817
[111]
C. Vogelmeier, B. Hederer, T. Glaab, et al.
Tiotropium versus salmeterol for the prevention of exacerbations of COPD.
N Engl J Med, 364 (2011), pp. 1093-1103
[112]
M.L. Decramer, K.R. Chapman, R. Dahl, et al.
Once-daily indacaterol versus tiotropium for patients with severe chronic obstructive pulmonary disease (INVIGORATE): a randomised, blinded, parallel-group study.
The Lancet Respiratory medicine, 1 (2013), pp. 524-533
[113]
N.R. Anthonisen, J.E. Connett, P.L. Enright, J. Manfreda, G. Lung Health Study Research.
Hospitalizations and mortality in the Lung Health Study.
Am J Respir Crit Care Med, 166 (2002), pp. 333-339
[114]
T.M. Michele, S. Pinheiro, S. Iyasu.
The safety of tiotropium--the FDA's conclusions.
N Engl J Med, 363 (2010), pp. 1097-1099
[115]
R.A. Wise, A. Anzueto, D. Cotton, et al.
Tiotropium Respimat inhaler and the risk of death in COPD.
N Engl J Med, 369 (2013), pp. 1491-1501
[116]
F.S. Ram, P.W. Jones, A.A. Castro, et al.
Oral theophylline for chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, (2002), pp. CD003902
[117]
R.L. ZuWallack, D.A. Mahler, D. Reilly, et al.
Salmeterol plus theophylline combination therapy in the treatment of COPD.
Chest, 119 (2001), pp. 1661-1670
[118]
E.C. Zacarias, A.A. Castro, S. Cendon.
Effect of theophylline associated with short-acting or long-acting inhaled beta2-agonists in patients with stable chronic obstructive pulmonary disease: a systematic review.
J Bras Pneumol, 33 (2007), pp. 152-160
[119]
B.G. Cosio, H. Shafiek, A. Iglesias, et al.
Oral Low-dose Theophylline on Top of Inhaled Fluticasone-Salmeterol Does Not Reduce Exacerbations in Patients With Severe COPD: A Pilot Clinical Trial.
[120]
Y. Zhou, X. Wang, X. Zeng, et al.
Positive benefits of theophylline in a randomized, double-blind, parallel-group, placebo-controlled study of low-dose, slow-release theophylline in the treatment of COPD for 1 year.
Respirology, 11 (2006), pp. 603-610
[121]
S.E. McKay, C.A. Howie, A.H. Thomson, B. Whiting, G.J. Addis.
Value of theophylline treatment in patients handicapped by chronic obstructive lung disease.
Thorax, 48 (1993), pp. 227-232
[122]
M. Cazzola, M. Molimard.
The scientific rationale for combining long-acting beta2-agonists and muscarinic antagonists in COPD.
Pulm Pharmacol Ther, 23 (2010), pp. 257-267
[123]
T. van der Molen, M. Cazzola.
Beyond lung function in COPD management: effectiveness of LABA/LAMA combination therapy on patient-centred outcomes.
Prim Care Respir J, 21 (2012), pp. 101-108
[124]
D.A. Mahler, M. Decramer, A. D’Urzo, et al.
Dual bronchodilation with QVA149 reduces patient-reported dyspnoea in COPD: the BLAZE study.
Eur Respir J, 43 (2014), pp. 1599-1609
[125]
D. Singh, G.T. Ferguson, J. Bolitschek, et al.
Tiotropium + olodaterol shows clinically meaningful improvements in quality of life.
Respir Med, 109 (2015), pp. 1312-1319
[126]
E.D. Bateman, K.R. Chapman, D. Singh, et al.
Aclidinium bromide and formoterol fumarate as a fixed-dose combination in COPD: pooled analysis of symptoms and exacerbations from two six-month, multicentre, randomised studies (ACLIFORM and AUGMENT).
[127]
D.A. Mahler, E. Kerwin, T. Ayers, et al.
FLIGHT1 and FLIGHT2: Efficacy and Safety of QVA149 (Indacaterol/Glycopyrrolate) versus Its Monocomponents and Placebo in Patients with Chronic Obstructive Pulmonary Disease.
Am J Respir Crit Care Med, 192 (2015), pp. 1068-1079
[128]
J.A. Wedzicha, M. Decramer, J.H. Ficker, et al.
Analysis of chronic obstructive pulmonary disease exacerbations with the dual bronchodilator QVA149 compared with glycopyrronium and tiotropium (SPARK): a randomised, double-blind, parallel-group study.
The Lancet Respiratory medicine, 1 (2013), pp. 199-209
[129]
J.A. Wedzicha, D. Banerji, K.R. Chapman, et al.
Indacaterol-Glycopyrronium versus Salmeterol-Fluticasone for COPD.
N Engl J Med, 374 (2016), pp. 2222-2234
[130]
L.J. Nannini, T.J. Lasserson, P. Poole.
Combined corticosteroid and long-acting beta(2)-agonist in one inhaler versus long-acting beta(2)-agonists for chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, 9 (2012), pp. CD006829
[131]
L.J. Nannini, P. Poole, S.J. Milan, A. Kesterton.
Combined corticosteroid and long-acting beta(2)-agonist in one inhaler versus inhaled corticosteroids alone for chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, 8 (2013), pp. CD006826
[132]
P.M. Calverley, J.A. Anderson, B. Celli, et al.
Salmeterol and fluticasone propionate and survival in chronic obstructive pulmonary disease.
N Engl J Med, 356 (2007), pp. 775-789
[133]
J. Vestbo, J.A. Anderson, R.D. Brook, et al.
Fluticasone furoate and vilanterol and survival in chronic obstructive pulmonary disease with heightened cardiovascular risk (SUMMIT): a double-blind randomised controlled trial.
Lancet, 387 (2016), pp. 1817-1826
[134]
I.A. Yang, M.S. Clarke, E.H. Sim, K.M. Fong.
Inhaled corticosteroids for stable chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, 7 (2012), pp. CD002991
[135]
C. Crim, M.T. Dransfield, J. Bourbeau, et al.
Pneumonia risk with inhaled fluticasone furoate and vilanterol compared with vilanterol alone in patients with COPD.
Annals of the American Thoracic Society, 12 (2015), pp. 27-34
[136]
O. Johnell, R. Pauwels, C.G. Lofdahl, et al.
Bone mineral density in patients with chronic obstructive pulmonary disease treated with budesonide Turbuhaler.
Eur Respir J, 19 (2002), pp. 1058-1063
[137]
G.T. Ferguson, P.M. Calverley, J.A. Anderson, et al.
Prevalence and progression of osteoporosis in patients with COPD: results from the TOwards a Revolution in COPD Health study.
Chest, 136 (2009), pp. 1456-1465
[138]
M.T. Dransfield, J. Bourbeau, P.W. Jones, et al.
Once-daily inhaled fluticasone furoate and vilanterol versus vilanterol only for prevention of exacerbations of COPD: two replicate double-blind, parallel-group, randomised controlled trials.
The Lancet Respiratory medicine, 1 (2013), pp. 210-223
[139]
Y.K. Loke, R. Cavallazzi, S. Singh.
Risk of fractures with inhaled corticosteroids in COPD: systematic review and meta-analysis of randomised controlled trials and observational studies.
Thorax, 66 (2011), pp. 699-708
[140]
S. Suissa, A. Kezouh, P. Ernst.
Inhaled corticosteroids and the risks of diabetes onset and progression.
Am J Med, 123 (2010), pp. 1001-1006
[141]
J.J. Wang, E. Rochtchina, A.G. Tan, R.G. Cumming, S.R. Leeder, P. Mitchell.
Use of inhaled and oral corticosteroids and the long-term risk of cataract.
Ophthalmology, 116 (2009), pp. 652-657
[142]
C. Andrejak, R. Nielsen, V.O. Thomsen, P. Duhaut, H.T. Sorensen, R.W. Thomsen.
Chronic respiratory disease, inhaled corticosteroids and risk of non-tuberculous mycobacteriosis.
[143]
Y.H. Dong, C.H. Chang, F.L. Lin Wu, et al.
Use of inhaled corticosteroids in patients with COPD and the risk of TB and influenza: A systematic review and meta-analysis of randomized controlled trials.
Chest, 145 (2014), pp. 1286-1297
[144]
C.H. Lee, K. Kim, M.K. Hyun, E.J. Jang, N.R. Lee, J.J. Yim.
Use of inhaled corticosteroids and the risk of tuberculosis.
Thorax, 68 (2013), pp. 1105-1113
[145]
N.J. Nadeem, S.J. Taylor, S.M. Eldridge.
Withdrawal of inhaled corticosteroids in individuals with COPD--a systematic review and comment on trial methodology.
Respir Res, 12 (2011), pp. 107
[146]
P. van der Valk, E. Monninkhof, J. van der Palen, G. Zielhuis, C. van Herwaarden.
Effect of discontinuation of inhaled corticosteroids in patients with chronic obstructive pulmonary disease: the COPE study.
Am J Respir Crit Care Med, 166 (2002), pp. 1358-1363
[147]
E.F. Wouters, D.S. Postma, B. Fokkens, et al.
Withdrawal of fluticasone propionate from combined salmeterol/fluticasone treatment in patients with COPD causes immediate and sustained disease deterioration: a randomised controlled trial.
Thorax, 60 (2005), pp. 480-487
[148]
L.I. Kunz, D.S. Postma, K. Klooster, et al.
Relapse in FEV1 Decline After Steroid Withdrawal in COPD.
Chest, 148 (2015), pp. 389-396
[149]
H. Magnussen, B. Disse, R. Rodriguez-Roisin, et al.
Withdrawal of inhaled glucocorticoids and exacerbations of COPD.
N Engl J Med, 371 (2014), pp. 1285-1294
[150]
T. Welte, M. Miravitlles, P. Hernandez, et al.
Efficacy and tolerability of budesonide/formoterol added to tiotropium in patients with chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 180 (2009), pp. 741-750
[151]
D. Singh, J. Brooks, G. Hagan, A. Cahn, B.J. O’Connor.
Superiority of “triple” therapy with salmeterol/fluticasone propionate and tiotropium bromide versus individual components in moderate to severe COPD.
Thorax, 63 (2008), pp. 592-598
[152]
K.S. Jung, H.Y. Park, S.Y. Park, et al.
Comparison of tiotropium plus fluticasone propionate/salmeterol with tiotropium in COPD: a randomized controlled study.
Respir Med, 106 (2012), pp. 382-389
[153]
N.A. Hanania, G.D. Crater, A.N. Morris, A.H. Emmett, D.M. O’Dell, D.E. Niewoehner.
Benefits of adding fluticasone propionate/salmeterol to tiotropium in moderate to severe COPD.
Respir Med, 106 (2012), pp. 91-101
[154]
P.A. Frith, P.J. Thompson, R. Ratnavadivel, et al.
Glycopyrronium once-daily significantly improves lung function and health status when combined with salmeterol/fluticasone in patients with COPD: the GLISTEN study, a randomised controlled trial.
[155]
T.M. Siler, E. Kerwin, K. Singletary, J. Brooks, A. Church.
Efficacy and Safety of Umeclidinium Added to Fluticasone Propionate/Salmeterol in Patients with COPD: Results of Two Randomized.
Double-Blind Studies. COPD, 13 (2016), pp. 1-10
[156]
D. Singh, A. Papi, M. Corradi, et al.
Single inhaler triple therapy versus inhaled corticosteroid plus long-acting beta2-agonist therapy for chronic obstructive pulmonary disease (TRILOGY): a double-blind, parallel group, randomised controlled trial.
[157]
S.D. Aaron, K.L. Vandemheen, D. Fergusson, et al.
Tiotropium in combination with placebo, salmeterol, or fluticasone-salmeterol for treatment of chronic obstructive pulmonary disease: a randomized trial.
Ann Intern Med, 146 (2007), pp. 545-555
[158]
P.M. Calverley, K.F. Rabe, U.M. Goehring, et al.
Roflumilast in symptomatic chronic obstructive pulmonary disease: two randomised clinical trials.
[159]
J. Chong, B. Leung, P. Poole.
Phosphodiesterase 4 inhibitors for chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, 11 (2013), pp. CD002309
[160]
T.A. Seemungal, T.M. Wilkinson, J.R. Hurst, W.R. Perera, R.J. Sapsford, J.A. Wedzicha.
Long-term erythromycin therapy is associated with decreased chronic obstructive pulmonary disease exacerbations.
Am J Respir Crit Care Med, 178 (2008), pp. 1139-1147
[161]
S. Uzun, R.S. Djamin, J.A. Kluytmans, et al.
Azithromycin maintenance treatment in patients with frequent exacerbations of chronic obstructive pulmonary disease (COLUMBUS): a randomised, double-blind, placebo-controlled trial.
The Lancet Respiratory medicine, 2 (2014), pp. 361-368
[162]
R.K. Albert, J. Connett, W.C. Bailey, et al.
Azithromycin for prevention of exacerbations of COPD.
N Engl J Med, 365 (2011), pp. 689-698
[163]
S. Sethi, P.W. Jones, M.S. Theron, et al.
Pulsed moxifloxacin for the prevention of exacerbations of chronic obstructive pulmonary disease: a randomized controlled trial.
Respir Res, 11 (2010), pp. 10
[164]
M. Cazzola, L. Calzetta, C. Page, et al.
Influence of N-acetylcysteine on chronic bronchitis or COPD exacerbations: a meta-analysis.
Eur Respir Rev, 24 (2015), pp. 451-461
[165]
P. Poole, J. Chong, C.J. Cates.
Mucolytic agents versus placebo for chronic bronchitis or chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, (2015), pp. CD001287
[166]
J.P. Collet, P. Shapiro, P. Ernst, T. Renzi, T. Ducruet, A. Robinson.
Effects of an immunostimulating agent on acute exacerbations and hospitalizations in patients with chronic obstructive pulmonary disease. The PARI-IS Study Steering Committee and Research Group. Prevention of Acute Respiratory Infection by an Immunostimulant.
Am J Respir Crit Care Med, 156 (1997), pp. 1719-1724
[167]
J. Li, J.P. Zheng, J.P. Yuan, G.Q. Zeng, N.S. Zhong, C.Y. Lin.
Protective effect of a bacterial extract against acute exacerbation in patients with chronic bronchitis accompanied by chronic obstructive pulmonary disease.
Chin Med J (Engl), 117 (2004), pp. 828-834
[168]
J.H. Lee, H.J. Kim, Y.H. Kim.
The Effectiveness of Anti-leukotriene Agents in Patients with COPD: A Systemic Review and Meta-analysis.
[169]
S.I. Rennard, C. Fogarty, S. Kelsen, et al.
The safety and efficacy of infliximab in moderate to severe chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 175 (2007), pp. 926-934
[170]
G.J. Criner, J.E. Connett, S.D. Aaron, et al.
Simvastatin for the prevention of exacerbations in moderate-to-severe COPD.
N Engl J Med, 370 (2014), pp. 2201-2210
[171]
T.S. Ingebrigtsen, J.L. Marott, B.G. Nordestgaard, P. Lange, J. Hallas, J. Vestbo.
Statin use and exacerbations in individuals with chronic obstructive pulmonary disease.
[172]
A. Lehouck, C. Mathieu, C. Carremans, et al.
High doses of vitamin D to reduce exacerbations in chronic obstructive pulmonary disease: a randomized trial.
Ann Intern Med, 156 (2012), pp. 105-114
[173]
A.S. Melani, M. Bonavia, V. Cilenti, et al.
Inhaler mishandling remains common in real life and is associated with reduced disease control.
Respir Med, 105 (2011), pp. 930-938
[174]
G.N. Rootmensen, A.R. van Keimpema, H.M. Jansen, R.J. de Haan.
Predictors of incorrect inhalation technique in patients with asthma or COPD: a study using a validated videotaped scoring method.
J Aerosol Med Pulm Drug Deliv, 23 (2010), pp. 323-328
[175]
D.E. Dantic.
A critical review of the effectiveness of “teach-back” technique in teaching COPD patients self-management using respiratory inhalers.
Health Educ J, 73 (2014), pp. 41-50
[176]
K.R. Chapman, R.A. Stockley, C. Dawkins, M.M. Wilkes, R.J. Navickis.
Augmentation therapy for alpha1 antitrypsin deficiency: a meta-analysis.
Copd, 6 (2009), pp. 177-184
[177]
K.R. Chapman, J.G. Burdon, E. Piitulainen, et al.
Intravenous augmentation treatment and lung density in severe alpha1 antitrypsin deficiency (RAPID): a randomised, double-blind, placebo-controlled trial.
[178]
A. Dirksen, J.H. Dijkman, F. Madsen, et al.
A randomized clinical trial of alpha(1)-antitrypsin augmentation therapy.
Am J Respir Crit Care Med, 160 (1999), pp. 1468-1472
[179]
A. Dirksen, E. Piitulainen, D.G. Parr, et al.
Exploring the role of CT densitometry: a randomised study of augmentation therapy in alpha1-antitrypsin deficiency.
Eur Respir J, 33 (2009), pp. 1345-1353
[180]
E.K. Schildmann, C. Remi, C. Bausewein.
Levodropropizine in the management of cough associated with cancer or nonmalignant chronic disease--a systematic review.
J Pain Palliat Care Pharmacother, 25 (2011), pp. 209-218
[181]
J.A. Barbera, N. Roger, J. Roca, I. Rovira, T.W. Higenbottam, R. Rodriguez-Roisin.
Worsening of pulmonary gas exchange with nitric oxide inhalation in chronic obstructive pulmonary disease.
Lancet, 347 (1996), pp. 436-440
[182]
I. Blanco, S. Santos, J. Gea, et al.
Sildenafil to improve respiratory rehabilitation outcomes in COPD: a controlled trial.
Eur Respir J, 42 (2013), pp. 982-992
[183]
A.R. Goudie, B.J. Lipworth, P.J. Hopkinson, L. Wei, A.D. Struthers.
Tadalafil in patients with chronic obstructive pulmonary disease: a randomised, double-blind, parallel-group, placebo-controlled trial.
The Lancet Respiratory medicine, 2 (2014), pp. 293-300
[184]
M.A. Spruit, S.J. Singh, C. Garvey, et al.
An official American Thoracic Society/European Respiratory Society statement: key concepts and advances in pulmonary rehabilitation.
Am J Respir Crit Care Med, 188 (2013), pp. e13-e64
[185]
M.A. Puhan, E. Gimeno-Santos, M. Scharplatz, T. Troosters, E.H. Walters, J. Steurer.
Pulmonary rehabilitation following exacerbations of chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, (2011), pp. CD005305
[186]
N.J. Greening, J.E. Williams, S.F. Hussain, et al.
An early rehabilitation intervention to enhance recovery during hospital admission for an exacerbation of chronic respiratory disease: randomised controlled trial.
BMJ, 349 (2014), pp. g4315
[187]
I. Vogiatzis, C.L. Rochester, M.A. Spruit, T. Troosters, E.M. Clini.
American Thoracic Society/European Respiratory Society Task Force on Policy in Pulmonary Rehabilitation.
Increasing implementation and delivery of pulmonary rehabilitation: key messages from the new ATS/ERS policy statement. Eur Respir J, 47 (2016), pp. 1336-1341
[188]
M. Zwerink, M. Brusse-Keizer, P.D. van der Valk, et al.
Self management for patients with chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, 3 (2014), pp. CD002990
[189]
V.S. Fan, J.M. Gaziano, R. Lew, et al.
A comprehensive care management program to prevent chronic obstructive pulmonary disease hospitalizations: a randomized, controlled trial.
[190]
I. Peytremann-Bridevaux, P. Taffe, B. Burnand, P.O. Bridevaux, M.A. Puhan.
Mortality of patients with COPD participating in chronic disease management programmes: a happy end?.
[191]
A.L. Kruis, N. Smidt, W.J. Assendelft, et al.
Integrated disease management interventions for patients with chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, 10 (2013), pp. CD009437
[192]
A.L. Kruis, M.R. Boland, W.J. Assendelft, et al.
Effectiveness of integrated disease management for primary care chronic obstructive pulmonary disease patients: results of cluster randomised trial.
BMJ, 349 (2014), pp. g5392
[193]
M. Cartwright, S.P. Hirani, L. Rixon, et al.
Effect of telehealth on quality of life and psychological outcomes over 12 months (Whole Systems Demonstrator telehealth questionnaire study): nested study of patient reported outcomes in a pragmatic, cluster randomised controlled trial.
BMJ, 346 (2013), pp. f653
[194]
American Academy of Hospice and Palliative Medicine Center to Advance Palliative Care Hospice and Palliative Nurses Association Last Acts Partnership National Hospice and Palliative Care Organization. National Consensus Project for Quality Palliative Care: Clinical Practice Guidelines for quality palliative care, executive summary.
Journal of palliative medicine, 7 (2004), pp. 611-627
[195]
D.M.G. Halpin, D.A. Seamark, C.J. Seamark.
Palliative and end-of-life care for patients with respiratory diseases.
Eur Respir Monograph, 43 (2009), pp. 327-353
[196]
C. Weber, J. Stirnemann, F.R. Herrmann, S. Pautex, J.P. Janssens.
Can early introduction of specialized palliative care limit intensive care, emergency and hospital admissions in patients with severe and very severe COPD?. a randomized study.
BMC Palliat Care, 13 (2014), pp. 47
[197]
K. Ek, B. Andershed, E. Sahlberg-Blom, B.M. Ternestedt.
The unpredictable death”-The last year of life for patients with advanced COPD: Relatives’ stories.
Palliat Support Care, 13 (2015), pp. 1213-1222
[198]
J.M. Cranston, A.J. Crockett, J.R. Moss, J.H. Alpers.
Domiciliary oxygen for chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, (2005), pp. CD001744
[199]
Long-term Oxygen Treatment Trial Research Group.
A randomized trial of long-term oxygen for COPD with moderate desaturation.
[200]
J.A. Galli, J.S. Krahnke, A. James Mamary, K. Shenoy, H. Zhao, G.J. Criner.
Home non-invasive ventilation use following acute hypercapnic respiratory failure in COPD.
Respir Med, 108 (2014), pp. 722-728
[201]
S. Coughlin, W.E. Liang, S. Parthasarathy.
Retrospective Assessment of Home Ventilation to Reduce Rehospitalization in Chronic Obstructive Pulmonary Disease.
Journal of clinical sleep medicine: JCSM: official publication of the American Academy of Sleep Medicine, 11 (2015), pp. 663-670
[202]
E. Clini, C. Sturani, A. Rossi, et al.
The Italian multicentre study on noninvasive ventilation in chronic obstructive pulmonary disease patients.
Eur Respir J, 20 (2002), pp. 529-538
[203]
T. Kohnlein, W. Windisch, D. Kohler, et al.
Non-invasive positive pressure ventilation for the treatment of severe stable chronic obstructive pulmonary disease: a prospective, multicentre, randomised, controlled clinical trial.
The Lancet Respiratory medicine, 2 (2014), pp. 698-705
[204]
F.M. Struik, R.T. Sprooten, H.A. Kerstjens, et al.
Nocturnal non-invasive ventilation in COPD patients with prolonged hypercapnia after ventilatory support for acute respiratory failure: a randomised, controlled, parallel-group study.
[205]
C. Casanova, B.R. Celli, L. Tost, et al.
Long-term controlled trial of nocturnal nasal positive pressure ventilation in patients with severe COPD.
Chest, 118 (2000), pp. 1582-1590
[206]
J.M. Marin, J.B. Soriano, S.J. Carrizo, A. Boldova, B.R. Celli.
Outcomes in patients with chronic obstructive pulmonary disease and obstructive sleep apnea: the overlap syndrome.
Am J Respir Crit Care Med, 182 (2010), pp. 325-331
[207]
A. Fishman, F. Martinez, K. Naunheim, et al.
A randomized trial comparing lung-volume-reduction surgery with medical therapy for severe emphysema.
N Engl J Med, 348 (2003), pp. 2059-2073
[208]
National Emphysema Treatment Trial Research Group.
Patients at high risk of death after lung-volume-reduction surgery.
N Engl J Med, 345 (2001), pp. 1075-1083
[209]
N. Marchetti, G.J. Criner.
Surgical Approaches to Treating Emphysema: Lung Volume Reduction Surgery, Bullectomy, and Lung Transplantation.
Semin Respir Crit Care Med, 36 (2015), pp. 592-608
[210]
J.D. Christie, L.B. Edwards, A.Y. Kucheryavaya, et al.
The Registry of the International Society for Heart and Lung Transplantation: 29th adult lung and heart-lung transplant report-2012.
J Heart Lung Transplant, 31 (2012), pp. 1073-1086
[211]
K. Stavem, O. Bjortuft, O. Borgan, O. Geiran, J. Boe.
Lung transplantation in patients with chronic obstructive pulmonary disease in a national cohort is without obvious survival benefit.
J Heart Lung Transplant, 25 (2006), pp. 75-84
[212]
G. Thabut, J.D. Christie, P. Ravaud, et al.
Survival after bilateral versus single lung transplantation for patients with chronic obstructive pulmonary disease: a retrospective analysis of registry data.
[213]
G.J. Criner, F. Cordova, A.L. Sternberg, F.J. Martinez.
The National Emphysema Treatment Trial (NETT) Part II: Lessons learned about lung volume reduction surgery.
Am J Respir Crit Care Med, 184 (2011), pp. 881-893
[214]
P.L. Shah, D.J. Slebos, P.F. Cardoso, et al.
Bronchoscopic lung-volume reduction with Exhale airway stents for emphysema (EASE trial): randomised, sham-controlled, multicentre trial.
Lancet, 378 (2011), pp. 997-1005
[215]
C.E. Come, M.R. Kramer, M.T. Dransfield, et al.
A randomised trial of lung sealant versus medical therapy for advanced emphysema.
Eur Respir J, 46 (2015), pp. 651-662
[216]
F.C. Sciurba, A. Ernst, F.J. Herth, et al.
A randomized study of endobronchial valves for advanced emphysema.
N Engl J Med, 363 (2010), pp. 1233-1244
[217]
C. Davey, Z. Zoumot, S. Jordan, et al.
Bronchoscopic lung volume reduction with endobronchial valves for patients with heterogeneous emphysema and intact interlobar fissures (the BeLieVeR-HIFi trial): study design and rationale.
[218]
K. Klooster, N.H. ten Hacken, J.E. Hartman, H.A. Kerstjens, E.M. van Rikxoort, D.J. Slebos.
Endobronchial Valves for Emphysema without Interlobar Collateral Ventilation.
N Engl J Med, 373 (2015), pp. 2325-2335
[219]
G. Deslee, H. Mal, H. Dutau, et al.
Lung Volume Reduction Coil Treatment vs Usual Care in Patients With Severe Emphysema: The REVOLENS Randomized Clinical Trial.
JAMA, 315 (2016), pp. 175-184
[220]
F.C. Sciurba, G.J. Criner, C. Strange, et al.
Effect of Endobronchial Coils vs Usual Care on Exercise Tolerance in Patients With Severe Emphysema: The RENEW Randomized Clinical Trial.
JAMA, 315 (2016), pp. 2178-2189
[221]
R.G. Barr, J. Bourbeau, C.A. Camargo, F.S. Ram.
Inhaled tiotropium for stable chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, (2005), pp. CD002876
[222]
C. Karner, C.J. Cates.
Long-acting beta(2)-agonist in addition to tiotropium versus either tiotropium or long-acting beta(2)-agonist alone for chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, (2012), pp. Cd008989
[223]
C. Vogelmeier, B. Hederer, T. Glaab, et al.
Tiotropium versus salmeterol for the prevention of exacerbations of COPD.
N Engl J Med, 364 (2011), pp. 1093-1103
[224]
F.J. Martinez, P.M. Calverley, U.M. Goehring, M. Brose, L.M. Fabbri, K.F. Rabe.
Effect of roflumilast on exacerbations in patients with severe chronic obstructive pulmonary disease uncontrolled by combination therapy (REACT): a multicentre randomised controlled trial.
[225]
F.J. Martinez, K.F. Rabe, S. Sethi, et al.
Effect of Roflumilast and Inhaled Corticosteroid/Long-Acting beta2-Agonist on Chronic Obstructive Pulmonary Disease Exacerbations (RE(2)SPOND). A Randomized Clinical Trial.
Am J Respir Crit Care Med, 194 (2016), pp. 559-567
[226]
I. Vogiatzis, C.L. Rochester, M.A. Spruit, T. Troosters, E.M. Clini.
American Thoracic Society/European Respiratory Society Task Force on Policy in Pulmonary R. Increasing implementation and delivery of pulmonary rehabilitation: key messages from the new ATS/ERS policy statement.
The European respiratory journal, 47 (2016), pp. 1336-1341
[227]
C. Garvey, M.P. Bayles, L.F. Hamm, et al.
Pulmonary Rehabilitation Exercise Prescription in Chronic Obstructive Pulmonary Disease: Review of Selected Guidelines: An official statement from the American Association of Cardiovascular and Pulmonary Rehabilitation J Cardiopulm Rehabil Prev, 36 (2016), pp. 75-83
[228]
F. Ortega, J. Toral, P. Cejudo, et al.
Comparison of effects of strength and endurance training in patients with chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 166 (2002), pp. 669-674
[229]
S. Bernard, F. Whittom, P. Leblanc, et al.
Aerobic and strength training in patients with chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 159 (1999), pp. 896-901
[230]
M. Velloso, N.H. do Nascimento, M.R. Gazzotti, J.R. Jardim.
Evaluation of effects of shoulder girdle training on strength and performance of activities of daily living in patients with chronic obstructive pulmonary disease.
Int J Chron Obstruct Pulmon Dis, 8 (2013), pp. 187-192
[231]
D.H. Au, E.M. Udris, R.A. Engelberg, et al.
A randomized trial to improve communication about end-of-life care among patients with COPD.
Chest, 141 (2012), pp. 726-735
[232]
S. Tomczyk, N.M. Bennett, C. Stoecker, et al.
Use of 13-valent pneumococcal conjugate vaccine and 23-valent pneumococcal polysaccharide vaccine among adults aged >/=65 years: recommendations of the Advisory Committee on Immunization Practices (ACIP).
MMWR Morb Mortal Wkly Rep, 63 (2014), pp. 822-825
[233]
F.M. Struik, Y. Lacasse, R.S. Goldstein, H.A. Kerstjens, P.J. Wijkstra.
Nocturnal noninvasive positive pressure ventilation in stable COPD: a systematic review and individual patient data meta-analysis.
Respir Med, 108 (2014), pp. 329-337
[234]
L.U. Tiong, R. Davies, P.G. Gibson, et al.
Lung volume reduction surgery for diffuse emphysema.
Cochrane Database Syst Rev, (2006), pp. Cd001001
[235]
D. Weill, C. Benden, P.A. Corris, et al.
A consensus document for the selection of lung transplant candidates: 2014--an update from the Pulmonary Transplantation Council of the International Society for Heart and Lung Transplantation.
J Heart Lung Transplant, 34 (2015), pp. 1-15
[236]
ISHLT: The International Society for Heart & Lung Transplantation [Internet]. Slide Sets - Overall Lung Transplantation Statistics. Available from: https://www.ishlt.org/downloadables/slides/2015/lung_adult.pptx (accessed 18 Sep 2016).
[237]
J.A. Wedzicha, T.A. Seemungal.
COPD exacerbations: defining their cause and prevention.
[238]
T.A. Seemungal, G.C. Donaldson, E.A. Paul, J.C. Bestall, D.J. Jeffries, J.A. Wedzicha.
Effect of exacerbation on quality of life in patients with chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 157 (1998), pp. 1418-1422
[239]
N.R. Anthonisen, J. Manfreda, C.P. Warren, E.S. Hershfield, G.K. Harding, N.A. Nelson.
Antibiotic therapy in exacerbations of chronic obstructive pulmonary disease.
Ann Intern Med, 106 (1987), pp. 196-204
[240]
M. Woodhead, F. Blasi, S. Ewig, et al.
Guidelines for the management of adult lower respiratory tract infections.
Eur Respir J, 26 (2005), pp. 1138-1180
[241]
A.J. White, S. Gompertz, R.A. Stockley.
Chronic obstructive pulmonary disease. 6: The aetiology of exacerbations of chronic obstructive pulmonary disease.
Thorax, 58 (2003), pp. 73-80
[242]
A. Papi, C.M. Bellettato, F. Braccioni, et al.
Infections and airway inflammation in chronic obstructive pulmonary disease severe exacerbations.
Am J Respir Crit Care Med, 173 (2006), pp. 1114-1121
[243]
M. Bafadhel, S. McKenna, S. Terry, et al.
Blood eosinophils to direct corticosteroid treatment of exacerbations of chronic obstructive pulmonary disease: a randomized placebo-controlled trial.
Am J Respir Crit Care Med, 186 (2012), pp. 48-55
[244]
T.A. Seemungal, G.C. Donaldson, A. Bhowmik, D.J. Jeffries, J.A. Wedzicha.
Time course and recovery of exacerbations in patients with chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 161 (2000), pp. 1608-1613
[245]
J.R. Hurst, G.C. Donaldson, J.K. Quint, J.J. Goldring, R. Baghai-Ravary, J.A. Wedzicha.
Temporal clustering of exacerbations in chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 179 (2009), pp. 369-374
[246]
J.M. Wells, G.R. Washko, M.K. Han, et al.
Pulmonary arterial enlargement and acute exacerbations of COPD.
N Engl J Med, 367 (2012), pp. 913-921
[247]
M.K. Han, E.A. Kazerooni, D.A. Lynch, et al.
Chronic obstructive pulmonary disease exacerbations in the COPDGene study: associated radiologic phenotypes.
Radiology, 261 (2011), pp. 274-282
[248]
V. Kim, M.K. Han, G.B. Vance, et al.
The chronic bronchitic phenotype of COPD: an analysis of the COPDGene Study.
Chest, 140 (2011), pp. 626-633
[249]
P.R. Burgel, P. Nesme-Meyer, P. Chanez, et al.
Cough and sputum production are associated with frequent exacerbations and hospitalizations in COPD subjects.
Chest, 135 (2009), pp. 975-982
[250]
F.J. Martinez, M.K. Han, K. Flaherty, J. Curtis.
Role of infection and antimicrobial therapy in acute exacerbations of chronic obstructive pulmonary disease.
Expert Rev Anti Infect Ther, 4 (2006), pp. 101-124
[251]
J.R. Hurst, J. Vestbo, A. Anzueto, et al.
Susceptibility to exacerbation in chronic obstructive pulmonary disease.
N Engl J Med, 363 (2010), pp. 1128-1138
[252]
B.R. Celli, N.E. Thomas, J.A. Anderson, et al.
Effect of pharmacotherapy on rate of decline of lung function in chronic obstructive pulmonary disease: results from the TORCH study.
Am J Respir Crit Care Med, 178 (2008), pp. 332-338
[253]
D.P. Tashkin, B. Celli, M. Decramer, et al.
Bronchodilator responsiveness in patients with COPD.
Eur Respir J, 31 (2008), pp. 742-750
[254]
M. Hoogendoorn, R.T. Hoogenveen, M.P. Rutten-van Molken, J. Vestbo, T.L. Feenstra.
Case fatality of COPD exacerbations: a meta-analysis and statistical modelling approach.
Eur Respir J, 37 (2011), pp. 508-515
[255]
J. Piquet, J.M. Chavaillon, P. David, et al.
High-risk patients following hospitalisation for an acute exacerbation of COPD.
Eur Respir J, 42 (2013), pp. 946-955
[256]
A. Singanayagam, S. Schembri, J.D. Chalmers.
Predictors of mortality in hospitalized adults with acute exacerbation of chronic obstructive pulmonary disease.
Annals of the American Thoracic Society, 10 (2013), pp. 81-89
[257]
J. Garcia-Aymerich, I. Serra Pons, D.M. Mannino, A.K. Maas, D.P. Miller, K.J. Davis.
Lung function impairment, COPD hospitalisations and subsequent mortality.
Thorax, 66 (2011), pp. 585-590
[258]
National Institute for Health and Care Excellence.
Chronic obstructive pulmonary disease in over 16s: diagnosis and management., (2010),
https://www.nice.org.uk/guidance/CG101
[259]
B.R. Celli, W. MacNee, ATS ERS Task Force.
Standards for the diagnosis and treatment of patients with COPD: a summary of the ATS/ERS position paper.
Eur Respir J, 23 (2004), pp. 932-946
[260]
M.O. Turner, A. Patel, S. Ginsburg, J.M. FitzGerald.
Bronchodilator delivery in acute airflow obstruction. A meta-analysis.
Arch Intern Med, 157 (1997), pp. 1736-1744
[261]
R.G. Barr, B.H. Rowe, C.A. Camargo Jr..
Methylxanthines for exacerbations of chronic obstructive pulmonary disease: meta-analysis of randomised trials.
[262]
N. Duffy, P. Walker, F. Diamantea, P.M. Calverley, L. Davies.
Intravenous aminophylline in patients admitted to hospital with non-acidotic exacerbations of chronic obstructive pulmonary disease: a prospective randomised controlled trial.
Thorax, 60 (2005), pp. 713-717
[263]
L. Davies, R.M. Angus, P.M. Calverley.
Oral corticosteroids in patients admitted to hospital with exacerbations of chronic obstructive pulmonary disease: a prospective randomised controlled trial.
Lancet, 354 (1999), pp. 456-460
[264]
F. Maltais, J. Ostinelli, J. Bourbeau, et al.
Comparison of nebulized budesonide and oral prednisolone with placebo in the treatment of acute exacerbations of chronic obstructive pulmonary disease: a randomized controlled trial.
Am J Respir Crit Care Med, 165 (2002), pp. 698-703
[265]
D.E. Niewoehner, M.L. Erbland, R.H. Deupree, et al.
Effect of systemic glucocorticoids on exacerbations of chronic obstructive pulmonary disease. Department of Veterans Affairs Cooperative Study Group.
N Engl J Med, 340 (1999), pp. 1941-1947
[266]
W.H. Thompson, C.P. Nielson, P. Carvalho, N.B. Charan, J.J. Crowley.
Controlled trial of oral prednisone in outpatients with acute COPD exacerbation.
Am J Respir Crit Care Med, 154 (1996), pp. 407-412
[267]
I. Alia, M.A. de la Cal, A. Esteban, et al.
Efficacy of corticosteroid therapy in patients with an acute exacerbation of chronic obstructive pulmonary disease receiving ventilatory support.
Arch Intern Med, 171 (2011), pp. 1939-1946
[268]
S.D. Aaron, K.L. Vandemheen, P. Hebert, et al.
Outpatient oral prednisone after emergency treatment of chronic obstructive pulmonary disease.
N Engl J Med, 348 (2003), pp. 2618-2625
[269]
J.D. Leuppi, P. Schuetz, R. Bingisser, et al.
Short-term vs conventional glucocorticoid therapy in acute exacerbations of chronic obstructive pulmonary disease: the REDUCE randomized clinical trial.
JAMA, 309 (2013), pp. 2223-2231
[270]
Y.P. de Jong, S.M. Uil, H.P. Grotjohan, D.S. Postma, H.A. Kerstjens, J.W. van den Berg.
Oral or IV prednisolone in the treatment of COPD exacerbations: a randomized, controlled, double-blind study.
Chest, 132 (2007), pp. 1741-1747
[271]
M. Bafadhel, S. McKenna, S. Terry, et al.
Acute exacerbations of chronic obstructive pulmonary disease: identification of biologic clusters and their biomarkers.
Am J Respir Crit Care Med, 184 (2011), pp. 662-671
[272]
D.J. Vollenweider, H. Jarrett, C.A. Steurer-Stey, J. Garcia-Aymerich, M.A. Puhan.
Antibiotics for exacerbations of chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, 12 (2012), pp. Cd010257
[273]
M. Miravitlles, F. Kruesmann, D. Haverstock, R. Perroncel, S.H. Choudhri, P. Arvis.
Sputum colour and bacteria in chronic bronchitis exacerbations: a pooled analysis.
Eur Respir J, 39 (2012), pp. 1354-1360
[274]
R.A. Stockley, C. O’Brien, A. Pye, S.L. Hill.
Relationship of sputum color to nature and outpatient management of acute exacerbations of COPD.
Chest, 117 (2000), pp. 1638-1645
[275]
F.S. Ram, R. Rodriguez-Roisin, A. Granados-Navarrete, J. Garcia-Aymerich, N.C. Barnes.
Antibiotics for exacerbations of chronic obstructive pulmonary disease.
Cochrane Database Syst Rev, (2006), pp. CD004403
[276]
P. Schuetz, M. Christ-Crain, R. Thomann, et al.
Effect of procalcitonin-based guidelines vs standard guidelines on antibiotic use in lower respiratory tract infections: the ProHOSP randomized controlled trial.
Jama, 302 (2009), pp. 1059-1066
[277]
P. Schuetz, B. Muller, M. Christ-Crain, et al.
Procalcitonin to initiate or discontinue antibiotics in acute respiratory tract infections.
Cochrane Database Syst Rev, (2012), pp. Cd007498
[278]
S. Nouira, S. Marghli, M. Belghith, L. Besbes, S. Elatrous, F. Abroug.
Once daily oral ofloxacin in chronic obstructive pulmonary disease exacerbation requiring mechanical ventilation: a randomised placebo- controlled trial.
Lancet, 358 (2001), pp. 2020-2025
[279]
R.G. Masterton, C.J. Burley.
Randomized, double-blind study comparing 5- and 7-day regimens of oral levofloxacin in patients with acute exacerbation of chronic bronchitis.
Int J Antimicrob Agents, 18 (2001), pp. 503-512
[280]
S. Adams, JM, M. Luther.
Antibiotics are associated with lower relapse rates in outpatients with acute exacerbations of chronic obstructive pulmonary disease.
Chest, 117 (2000), pp. 1345-1352
[281]
M. Miravitlles, C. Espinosa, E. Fernandez-Laso, J.A. Martos, J.A. Maldonado, M. Gallego.
Relationship between bacterial flora in sputum and functional impairment in patients with acute exacerbations of COPD. Study Group of Bacterial Infection in COPD.
Chest, 116 (1999), pp. 40-46
[282]
N. Soler, A. Torres, S. Ewig, et al.
Bronchial microbial patterns in severe exacerbations of chronic obstructive pulmonary disease (COPD) requiring mechanical ventilation.
Am J Respir Crit Care Med, 157 (1998), pp. 1498-1505
[283]
M.A. Austin, K.E. Wills, L. Blizzard, E.H. Walters, R. Wood-Baker.
Effect of high flow oxygen on mortality in chronic obstructive pulmonary disease patients in prehospital setting: randomised controlled trial.
BMJ, 341 (2010), pp. c5462
[284]
L. Brochard, J. Mancebo, M. Wysocki, et al.
Noninvasive ventilation for acute exacerbations of chronic obstructive pulmonary disease.
N Engl J Med, 333 (1995), pp. 817-822
[285]
J.V. Lightowler, J.A. Wedzicha, M.W. Elliott, F.S. Ram.
Non-invasive positive pressure ventilation to treat respiratory failure resulting from exacerbations of chronic obstructive pulmonary disease: Cochrane systematic review and meta-analysis.
BMJ, 326 (2003), pp. 185
[286]
T.J. Meyer, N.S. Hill.
Noninvasive positive pressure ventilation to treat respiratory failure.
Ann Intern Med, 120 (1994), pp. 760-770
[287]
D. Chandra, J.A. Stamm, B. Taylor, et al.
Outcomes of noninvasive ventilation for acute exacerbations of chronic obstructive pulmonary disease in the United States, 1998-2008.
Am J Respir Crit Care Med, 185 (2012), pp. 152-159
[288]
Consensus development conference committee.
Clinical indications for noninvasive positive pressure ventilation in chronic respiratory failure due to restrictive lung disease, COPD, and nocturnal hypoventilation--a consensus conference report.
Chest, 116 (1999), pp. 521-534
[289]
J. Bott, M.P. Carroll, J.H. Conway, et al.
Randomised controlled trial of nasal ventilation in acute ventilatory failure due to chronic obstructive airways disease.
Lancet, 341 (1993), pp. 1555-1557
[290]
N. Kramer, T.J. Meyer, J. Meharg, R.D. Cece, N.S. Hill.
Randomized, prospective trial of noninvasive positive pressure ventilation in acute respiratory failure.
Am J Respir Crit Care Med, 151 (1995), pp. 1799-1806
[291]
P.K. Plant, J.L. Owen, M.W. Elliott.
Early use of non-invasive ventilation for acute exacerbations of chronic obstructive pulmonary disease on general respiratory wards: a multicentre randomised controlled trial.
Lancet, 355 (2000), pp. 1931-1935
[292]
G. Conti, M. Antonelli, P. Navalesi, et al.
Noninvasive vs conventional mechanical ventilation in patients with chronic obstructive pulmonary disease after failure of medical treatment in the ward: a randomized trial.
Intensive Care Med, 28 (2002), pp. 1701-1707
[293]
J.H. Jennings, K. Thavarajah, M.P. Mendez, M. Eichenhorn, P. Kvale, L. Yessayan.
Predischarge bundle for patients with acute exacerbations of COPD to reduce readmissions and ED visits: a randomized controlled trial.
Chest, 147 (2015), pp. 1227-1234
[294]
G. Singh, W. Zhang, Y.F. Kuo, G. Sharma.
Association of Psychological Disorders With 30-Day Readmission Rates in Patients With COPD.
Chest, 149 (2016), pp. 905-915
[295]
T. Ringbaek, A. Green, L.C. Laursen, E. Frausing, E. Brondum, C.S. Ulrik.
Effect of tele health care on exacerbations and hospital admissions in patients with chronic obstructive pulmonary disease: a randomized clinical trial.
Int J Chron Obstruct Pulmon Dis, 10 (2015), pp. 1801-1808
[296]
S. Hartl, J.L. Lopez-Campos, F. Pozo-Rodriguez, et al.
Risk of death and readmission of hospital-admitted COPD exacerbations: European COPD Audit.
Eur Respir J, 47 (2016), pp. 113-121
[297]
R.E. Jordan, S. Majothi, N.R. Heneghan, et al.
Supported self-management for patients with moderate to severe chronic obstructive pulmonary disease (COPD): an evidence synthesis and economic analysis.
Health technology assessment (Winchester, England), 19 (2015), pp. 1-516
[298]
R. Gavish, A. Levy, O.K. Dekel, E. Karp, N. Maimon.
The Association Between Hospital Readmission and Pulmonologist Follow-up Visits in Patients With COPD.
Chest, 148 (2015), pp. 375-381
[299]
T. Oga, M. Tsukino, T. Hajiro, A. Ikeda, K. Nishimura.
Predictive properties of different multidimensional staging systems in patients with chronic obstructive pulmonary disease.
Int J Chron Obstruct Pulmon Dis, 6 (2011), pp. 521-526
[300]
M.A. Martinez-Garcia, D. de la Rosa Carrillo, J.J. Soler-Cataluna, et al.
Prognostic value of bronchiectasis in patients with moderate-to-severe chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 187 (2013), pp. 823-831
[301]
P.J. Barnes, B.R. Celli.
Systemic manifestations and comorbidities of COPD.
Eur Respir J, 33 (2009), pp. 1165-1185
[302]
D.M. Mannino, D. Thorn, A. Swensen, F. Holguin.
Prevalence and outcomes of diabetes, hypertension and cardiovascular disease in COPD.
Eur Respir J, 32 (2008), pp. 962-969
[303]
D.D. Sin, N.R. Anthonisen, J.B. Soriano, A.G. Agusti.
Mortality in COPD: Role of comorbidities.
Eur Respir J, 28 (2006), pp. 1245-1257
[304]
K.K. Iversen, J. Kjaergaard, D. Akkan, et al.
The prognostic importance of lung function in patients admitted with heart failure.
Eur J Heart Fail, 12 (2010), pp. 685-691
[305]
P. Almagro, J.B. Soriano, F.J. Cabrera, et al.
Short- and medium-term prognosis in patients hospitalized for COPD exacerbation: the CODEX index.
Chest, 145 (2014), pp. 972-980
[306]
J. Miller, L.D. Edwards, A. Agusti, et al.
Comorbidity, systemic inflammation and outcomes in the ECLIPSE cohort.
Respir Med, 107 (2013), pp. 1376-1384
[307]
G. Campo, N. Napoli, C. Serenelli, M. Tebaldi, R. Ferrari.
Impact of a recent hospitalization on treatment and prognosis of ST-segment elevation myocardial infarction.
Int J Cardiol, 167 (2013), pp. 296-297
[308]
L.M. Fabbri, F. Luppi, B. Beghe, K.F. Rabe.
Complex chronic comorbidities of COPD.
Eur Respir J, 31 (2008), pp. 204-212
[309]
S.P. Bhatt, M.T. Dransfield.
Chronic obstructive pulmonary disease and cardiovascular disease.
Transl Res, 162 (2013), pp. 237-251
[310]
D. Matamis, M. Tsagourias, A. Papathanasiou, et al.
Targeting occult heart failure in intensive care unit patients with acute chronic obstructive pulmonary disease exacerbation: effect on outcome and quality of life.
315.e7-e14
[311]
M.I. MacDonald, E. Shafuddin, P.T. King, C.L. Chang, P.G. Bardin, R.J. Hancox.
Cardiac dysfunction during exacerbations of chronic obstructive pulmonary disease.
The Lancet Respiratory medicine, 4 (2016), pp. 138-148
[312]
B. Lipworth, J. Wedzicha, G. Devereux, J. Vestbo, M.T. Dransfield.
Beta-blockers in COPD: time for reappraisal.
Eur Respir J, 48 (2016), pp. 880-888
[313]
A.D. Hoiseth, A. Neukamm, B.D. Karlsson, T. Omland, P.H. Brekke, V. Soyseth.
Elevated high-sensitivity cardiac troponin T is associated with increased mortality after acute exacerbation of chronic obstructive pulmonary disease.
Thorax, 66 (2011), pp. 775-781
[314]
S. Singh, Y.K. Loke, P. Enright, C.D. Furberg.
Pro-arrhythmic and pro-ischaemic effects of inhaled anticholinergic medications.
[315]
M. Wilchesky, P. Ernst, J.M. Brophy, R.W. Platt, S. Suissa.
Bronchodilator use and the risk of arrhythmia in COPD: part 2: reassessment in the larger Quebec cohort.
Chest, 142 (2012), pp. 305-311
[316]
S.R. Salpeter, T.M. Ormiston, E.E. Salpeter.
Cardiovascular effects of beta-agonists in patients with asthma and COPD: a meta-analysis.
Chest, 125 (2004), pp. 2309-2321
[317]
D.P. Tashkin, L.M. Fabbri.
Long-acting beta-agonists in the management of chronic obstructive pulmonary disease: current and future agents.
Respir Res, 11 (2010), pp. 149
[318]
P. Calverley, R. Pauwels, J. Vestbo, et al.
Combined salmeterol and fluticasone in the treatment of chronic obstructive pulmonary disease: a randomised controlled trial.
[319]
W. Szafranski, A. Cukier, A. Ramirez, et al.
Efficacy and safety of budesonide/formoterol in the management of chronic obstructive pulmonary disease.
Eur Respir J, 21 (2003), pp. 74-81
[320]
P.M. Calverley, W. Boonsawat, Z. Cseke, N. Zhong, S. Peterson, H. Olsson.
Maintenance therapy with budesonide and formoterol in chronic obstructive pulmonary disease.
Eur Respir J, 22 (2003), pp. 912-919
[321]
P.M. Calverley, J.A. Anderson, B. Celli, et al.
Cardiovascular events in patients with COPD: TORCH study results.
Thorax, 65 (2010), pp. 719-725
[322]
J. Vestbo, J.A. Anderson, R.D. Brook, et al.
Fluticasone furoate and vilanterol and survival in chronic obstructive pulmonary disease with heightened cardiovascular risk (SUMMIT): a double-blind randomised controlled trial.
Lancet, 387 (2016), pp. 1817-1826
[323]
S. Houben-Wilke, R.A. Jorres, R. Bals, et al.
Peripheral Artery Disease and its Clinical Relevance in Patients with COPD in the COSYCONET Study.
Am J Respir Crit Care Med, (2016),
EPub 17 Aug 2016
[324]
M. Divo, C. Cote, J.P. de Torres, et al.
Comorbidities and risk of mortality in patients with chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 186 (2012), pp. 155-161
[325]
J. Bon, C.R. Fuhrman, J.L. Weissfeld, et al.
Radiographic emphysema predicts low bone mineral density in a tobacco-exposed cohort.
Am J Respir Crit Care Med, 183 (2011), pp. 885-890
[326]
D.A. McAllister, J.D. Maclay, N.L. Mills, et al.
Arterial stiffness is independently associated with emphysema severity in patients with chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 176 (2007), pp. 1208-1214
[327]
C.E. Bolton, R. Cannings-John, P.H. Edwards, et al.
What community measurements can be used to predict bone disease in patients with COPD?.
Respir Med, 102 (2008), pp. 651-657
[328]
C.E. Bolton, A.A. Ionescu, K.M. Shiels, et al.
Associated loss of fat-free mass and bone mineral density in chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 170 (2004), pp. 1286-1293
[329]
J.D. Jaramillo, C. Wilson, D.S. Stinson, et al.
Reduced Bone Density and Vertebral Fractures in Smokers. Men and COPD Patients at Increased Risk.
Annals of the American Thoracic Society, 12 (2015), pp. 648-656
[330]
J. Jaramillo, C. Wilson, D. Stinson, et al.
Erratum: reduced bone density and vertebral fractures in smokers. men and COPD patients at increased risk.
Annals of the American Thoracic Society, 12 (2015), pp. 1112
[331]
T.P. Ng, M. Niti, W.C. Tan, Z. Cao, K.C. Ong, P. Eng.
Depressive symptoms and chronic obstructive pulmonary disease: effect on mortality, hospital readmission, symptom burden, functional status, and quality of life.
Arch Intern Med, 167 (2007), pp. 60-67
[332]
M.D. Eisner, P.D. Blanc, E.H. Yelin, et al.
Influence of anxiety on health outcomes in COPD.
Thorax, 65 (2010), pp. 229-234
[333]
J.P. de Torres, G. Bastarrika, J.P. Wisnivesky, et al.
Assessing the relationship between lung cancer risk and emphysema detected on low-dose CT of the chest.
Chest, 132 (2007), pp. 1932-1938
[334]
D.O. Wilson, J.K. Leader, C.R. Fuhrman, J.J. Reilly, F.C. Sciurba, J.L. Weissfeld.
Quantitative computed tomography analysis, airflow obstruction, and lung cancer in the pittsburgh lung screening study.
J Thorac Oncol, 6 (2011), pp. 1200-1205
[335]
D.O. Wilson, J.L. Weissfeld, A. Balkan, et al.
Association of radiographic emphysema and airflow obstruction with lung cancer.
Am J Respir Crit Care Med, 178 (2008), pp. 738-744
[336]
J.P. de-Torres, D.O. Wilson, P. Sanchez-Salcedo, et al.
Lung cancer in patients with chronic obstructive pulmonary disease. Development and validation of the COPD Lung Cancer Screening Score.
Am J Respir Crit Care Med, 191 (2015), pp. 285-291
[337]
D.R. Aberle, A.M. Adams, C.D. Berg, et al.
Reduced lung-cancer mortality with low-dose computed tomographic screening.
N Engl J Med, 365 (2011), pp. 395-409
[338]
M. Infante, S. Cavuto, F.R. Lutman, et al.
Long-Term Follow-up Results of the DANTE Trial, a Randomized Study of Lung Cancer Screening with Spiral Computed Tomography.
Am J Respir Crit Care Med, 191 (2015), pp. 1166-1175
[339]
N. Cebron Lipovec, R.J. Beijers, B. van den Borst, W. Doehner, M. Lainscak, A.M. Schols.
The Prevalence of Metabolic Syndrome In Chronic Obstructive Pulmonary Disease: A Systematic Review.
[340]
C.H. Martinez, Y. Okajima, S. Murray, et al.
Impact of self-reported gastroesophageal reflux disease in subjects from COPDGene cohort.
Respir Res, 15 (2014), pp. 62
[341]
T.S. Ingebrigtsen, J.L. Marott, J. Vestbo, B.G. Nordestgaard, J. Hallas, P. Lange.
Gastro-esophageal reflux disease and exacerbations in chronic obstructive pulmonary disease.
Respirology, 20 (2015), pp. 101-107
[342]
I.S. Patel, I. Vlahos, T.M. Wilkinson, et al.
Bronchiectasis, exacerbation indices, and inflammation in chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 170 (2004), pp. 400-407
[343]
J.W. Shepard Jr., M.W. Garrison, D.A. Grither, R. Evans, P.K. Schweitzer.
Relationship of ventricular ectopy to nocturnal oxygen desaturation in patients with chronic obstructive pulmonary disease.
Am J Med, 78 (1985), pp. 28-34
[344]
T.D. Bradley, R. Rutherford, R.F. Grossman, et al.
Role of daytime hypoxemia in the pathogenesis of right heart failure in the obstructive sleep apnea syndrome.
Am Rev Respir Dis, 131 (1985), pp. 835-839
[345]
E. Weitzenblum, J. Krieger, M. Apprill, et al.
Daytime pulmonary hypertension in patients with obstructive sleep apnea syndrome.
Am Rev Respir Dis, 138 (1988), pp. 345-349

These authors contributed equally to the manuscript

Please cite this article as: Vogelmeier CF, Criner GJ, Martinez FJ, Anzueto A, Barnes PJ, Bourbeau J, et al. Documento sobre la estrategia global para el diagnóstico, el manejo, y la prevención de la Enfermedad Pulmonar Obstructiva Crónica: Sumario ejecutivo de la GOLD. Arch Bronconeumol. 2017;53:128–149.

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