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Moreover&#44; survival has not increased in the last few years&#44; and the relative 5-year survival is 10&#46;6&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0180"><span class="elsevierStyleSup">4</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">In recent years&#44; there has been an increase in the incidence of LC among women&#44; and the pattern of predominant histological variants has changed due to changes in the type of tobacco smoked&#46;<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">5</span></a> Squamous cell carcinoma remains the most common histological type only among male smokers&#46;<a class="elsevierStyleCrossRef" href="#bib0190"><span class="elsevierStyleSup">6</span></a> Survival has also improved slightly in certain patient groups&#44; primarily those with mutations that respond to targeted treatments&#46;<a class="elsevierStyleCrossRefs" href="#bib0195"><span class="elsevierStyleSup">7&#44;8</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">Data from the United States suggest that approximately 57&#37; of LCs are diagnosed when the disease has already metastasized&#44; and 22&#37; of cases have regional lymph node dissemination at diagnosis&#46; Only 16&#37; are diagnosed when the tumor is still confined to the primary site&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">9</span></a> In the Corunna healthcare area&#44; 21&#37; of cases are diagnosed in stages I and II&#46; Symptoms are not only rare in early-stage disease&#44; they are also non-specific&#44; particularly in the early stages&#46; This leads to a significant delay in diagnosis&#44; as other more common diseases are generally ruled out first&#46; It is therefore unusual for LC to be diagnosed in stage I or II&#44; and these stages are generally discovered incidentally during differential diagnosis for other diseases&#46;<a class="elsevierStyleCrossRef" href="#bib0210"><span class="elsevierStyleSup">10</span></a> Consequently&#44; 5-year survival in this type of cancer&#44; at less than 15&#37; worldwide&#44; remains low&#46;<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">5</span></a> In the United States&#44; 5-year survival in localized disease is 55&#46;6&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">9</span></a> Screening programs among smokers have been proposed in an attempt to improve survival&#44; but the risk&#8211;benefit ratio is unclear&#44; and currently screening is not systematically offered by the public health system of any European country&#46;<a class="elsevierStyleCrossRefs" href="#bib0210"><span class="elsevierStyleSup">10&#8211;15</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall">Given the lack of evidence in stage I and II LC patients&#44; our objective was to determine their characteristics at diagnosis and to analyze survival&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Methods</span><p id="par0025" class="elsevierStylePara elsevierViewall">This retrospective case series includes all patients diagnosed with stage I and II LC between January 2011 and December 2015 in the Corunna healthcare area &#40;Galicia&#44; Spain&#41;&#46; Patient inclusion concluded in December 2015&#44; to allow for a minimum follow-up of 1&#46;5 years after diagnosis &#40;until June 30&#44; 2017&#41;&#46; The reference hospital is the Complejo Hospitalario Universitario de A Coru&#241;a &#40;CHUAC&#41;&#44; which has a catchment area of 584&#44;283 inhabitants&#46;<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">16</span></a></p><p id="par0030" class="elsevierStylePara elsevierViewall">The study included all cases managed medically in the CHUAC LC clinic with a final diagnosis of stage IA&#44; IB&#44; IIA or IIB LC&#44; according to the 7th edition of the TNM classification&#46;<a class="elsevierStyleCrossRef" href="#bib0245"><span class="elsevierStyleSup">17</span></a> Histopathological diagnosis was confirmed for all patients&#44; except for 1 from whom insufficient sample material for histological study was obtained&#44; but whose clinical and radiological picture were consistent with a diagnosis of LC&#46; Staging was performed from clinical history&#44; biochemistry&#44; chest-abdomen CT and PET&#46; EBUS&#47;EUS was used when positive mediastinal lymphadenopathies were observed on a PET &#40;SUV<span class="elsevierStyleHsp" style=""></span>&#62;<span class="elsevierStyleHsp" style=""></span>2&#46;5&#41;&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">The following variables were collected from the electronic medical records&#58; date of birth&#44; sex&#44; age at diagnosis&#44; smoking habit &#40;smoker&#47;former smoker&#47;never smoker&#41;&#44; time since smoking cessation&#44; tobacco consumption &#40;pack-years&#41;&#44; presence of COPD&#44; reason for referral &#40;symptoms&#47;follow-up of respiratory disease&#47;purely incidental&#41;&#44; symptoms at diagnosis &#40;none&#47;cough&#47;dyspnea&#47;hemoptysis&#47;constitutional syndrome&#47;other&#41;&#44; diagnostic test prompting suspicion &#40;chest X-ray&#47;CT&#47;other&#41;&#44; stage at diagnosis &#40;IA&#44; IB&#44; IIA&#44; and IIB&#41;&#44; histological type &#40;squamous cell&#47;adenocarcinoma&#47;small cell&#47;large cell&#47;other&#41;&#44; treatment &#40;surgery&#47;chemotherapy&#47;radiation therapy&#41;&#44; and vital status of the patient &#40;date of death&#47;survival&#41;&#46; As the reason leading to diagnosis in patients with early-stage disease was considered pertinent to this research&#44; patients were classified as follows&#58; &#40;a&#41; patients investigated for LC due to symptoms consistent with the disease&#44; &#40;b&#41; patients monitored for respiratory disease&#44; or &#40;c&#41; patients diagnosed with cancer by chance &#40;incidental finding&#41;&#46; In the latter group&#44; the test prompting the diagnosis was not related with LC &#40;i&#46;e&#46;&#44; symptoms may have been present&#44; but this was not why the cancer was detected&#41;&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">The date of death was obtained using Document Management program of the Corunna healthcare area&#46; This system records the date of death of inhabitants in the healthcare area&#44; although with some delay&#46; The electronic medical records do not include the date of death if death occurs outside the hospital setting&#46; Inclusion ended on December 31&#44; 2015&#44; so survival data of all patients are up-to-date&#46; COPD was diagnosed as an FEV1&#47;FVC ratio of &#60;70&#37; in a post-bronchodilator spirometry&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">Bearing in mind the current debate on implementing population screening for LC&#44; we also included a dichotomous variable&#58; meets screening criteria according to the current US criteria&#44; yes&#47;no &#40;smoker or former smoker &#60;15 years&#44; &#8805;55 and &#60;80 years of age&#44; and cumulative tobacco consumption of &#8805;30 pack-years&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0250"><span class="elsevierStyleSup">18</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">Exclusion criteria were&#58; stage at diagnosis greater than IIB&#44; no clinical&#47;pathological confirmation of LC&#44; and patients whose first consultation was in the CHUAC but who were subsequently managed in another healthcare area&#46;</p><p id="par0055" class="elsevierStylePara elsevierViewall">Statistical analysis was performed using SPSS 20&#46;0&#46; The <span class="elsevierStyleItalic">&#967;</span><span class="elsevierStyleSup">2</span>-test was used to determine a possible association between qualitative variables&#46; Survival analysis was performed using Kaplan&#8211;Meier curves and survival functions were compared using the log-rank test to estimate <span class="elsevierStyleItalic">p</span>&#46; Statistical significance was set at <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#46;05&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Results</span><p id="par0060" class="elsevierStylePara elsevierViewall">In total&#44; 158 patients were included in the study&#44; 99 at stage I and 59 at stage II&#59; 81&#37; were men and the median age at diagnosis was 69 years &#40;mean age&#44; 68 years&#41;&#46; No statistically significant differences between sex and age were found for stage at diagnosis&#46; The predominant histology was adenocarcinoma &#40;52&#46;9&#37;&#41; &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#44; which was the histological type most frequently diagnosed in women &#40;73&#46;3&#37;&#41; vs 48&#37; in men&#44; and mainly in individuals under the age of 70 years &#40;62&#46;2&#37;&#41;&#46; In patients older than 70 years&#44; adenocarcinoma and squamous cell carcinoma occurred at similar rates&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0065" class="elsevierStylePara elsevierViewall">A total of 76&#46;3&#37; of participants were referred to the LC fast-track clinic due to a finding encountered during the follow-up of a medical problem&#44; and 9&#46;6&#37; were referred to the fast-track clinic due to a high suspicion of LC&#46; In 43&#46;6&#37; of cases&#44; LC was diagnosed incidentally&#44; more of which were stage I than stage II&#46; This difference was statistically significant &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">In total&#44; 35&#46;9&#37; of subjects were completely asymptomatic at diagnosis&#44; while 64&#46;1&#37; had some kind of symptoms associated with LC&#44; such as cough&#44; dyspnea&#44; hemoptysis&#44; constitutional syndrome&#44; or other rarer manifestations&#46; Only 14&#46;3&#37; of the asymptomatic patients were diagnosed with stage II disease &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46; Some incidental cases had symptoms at the time of diagnosis&#44; but did not seek medical attention for reasons related with LC&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall">Never smokers represented 12&#46;1&#37; of the overall population&#44; while rates among former smokers &#40;49&#37;&#41; and active smokers &#40;38&#46;9&#37;&#41; were higher&#46; One hundred and seventeen patients had a cumulative consumption of more than 30 pack-years&#44; with no significant differences between stages I and II&#46; The presence of COPD &#40;43&#46;7&#37;&#41; was not associated with diagnosis at a more advanced stage&#46; Only 45&#46;2&#37; of patients in our series met LC screening criteria&#46; Nineteen patients &#40;12&#37;&#41; did not receive surgery&#44; due to concomitant COPD or advanced age&#46; The median age of unoperated patients was 79 years &#40;10 years older than the total series&#41;&#44; and 74&#37; of them had COPD&#46; In total&#44; 53&#37; of these patients were stage II&#44; compared to 33&#37; of the overall series&#46; Four of the 5 unoperated patients without COPD were 82 years of age or more&#44; and 1 patient aged 62 years had kidney failure&#44; heart failure&#44; and arteriosclerosis&#46; In all these cases&#44; the risk&#8211;benefit balance made surgery inadvisable&#46;</p><p id="par0080" class="elsevierStylePara elsevierViewall">Median overall survival was 57 months &#40;95&#37; CI&#58; 48&#46;1&#8211;65&#46;9&#41;&#46; Survival among men was shorter than among women&#58; 81&#46;9&#37; of men survived more than 18 months&#44; compared to 93&#46;3&#37; of women &#40;<span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;016&#41;&#46; Three-year survival was 61&#46;3&#37; in men vs 79&#46;4&#37; in women&#46; With regard to age&#44; survival among patients aged 70 years or more was shorter than in younger subjects &#40;<span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;08&#41;&#46; At 3 years post-diagnosis&#44; 54&#46;8&#37; of patients aged 70 years or more were alive&#44; compared to 73&#46;6&#37; of the younger group &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><p id="par0085" class="elsevierStylePara elsevierViewall">No significant differences were found in median survival between symptomatic subjects&#44; those who were being followed up for respiratory disease&#44; and those with an incidental finding of suspected LC on an imaging test&#46; However&#44; median survival varied among groups&#44; being longer in incidental cases&#44; with a median survival of 72 months compared to 57 months in symptomatic patients&#44; and 53 months in patients in clinical follow-up&#46; This is also consistent with the data obtained when patients who were asymptomatic at the time of diagnosis &#40;median survival of 72 months&#41; were compared with patients with symptoms of LC &#40;53 months&#41;&#44; although the difference did not reach statistical significance &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a> and <a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0090" class="elsevierStylePara elsevierViewall">Survival was shorter in smokers of &#8805;30 pack-years &#40;53 months&#41; than in those with a consumption of &#60;30 pack-years &#40;72 months&#41;&#46; These differences approached statistical significance&#46; Patients with COPD also died earlier &#40;18-month survival of 76&#46;5&#37;&#41; than patients without respiratory disease &#40;18-month survival of 89&#46;8&#37;&#41;&#46; The difference between the survival data of these groups 3 years after diagnosis was rather less marked &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a> and <a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46; Median survival among patients who did not undergo surgery was much shorter &#40;20 vs 72 months&#41; &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46;</p><p id="par0095" class="elsevierStylePara elsevierViewall">Survival at 18 months was better in the group who did not meet screening criteria&#44; but the opposite is the case for a 3-year survival &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>F&#41;&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Discussion</span><p id="par0100" class="elsevierStylePara elsevierViewall">These results show that survival in stage I and II LC is still low&#46; Half of our patients died within 57 months of diagnosis &#40;median survival of less than 5 years&#41;&#59; these data are a slight improvement on US figures&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">9</span></a> Surgery probably cannot be considered a curative treatment&#44; although it clearly has a crucial effect on survival&#46; These poor outcomes are remarkable if we remember that 5-year survival after early-stage breast cancer is around 90&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0255"><span class="elsevierStyleSup">19</span></a></p><p id="par0105" class="elsevierStylePara elsevierViewall">The epidemiology of LC is changing&#46; In Spain&#44; LC mortality in women has doubled in the last 10 years&#44;<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">20</span></a> a trend that is reflected in our series&#44; where the male&#58;female ratio is 4&#46;3&#58;1&#44; lower than that reported in previous series&#46;<a class="elsevierStyleCrossRef" href="#bib0265"><span class="elsevierStyleSup">21</span></a> These data are in line with changes in the epidemiological distribution of LC by sex in Spain and Europe&#46;<a class="elsevierStyleCrossRef" href="#bib0270"><span class="elsevierStyleSup">22</span></a> With regard to age&#44; our median of 69 years is similar to that of the rest of Spain&#46;<a class="elsevierStyleCrossRef" href="#bib0275"><span class="elsevierStyleSup">23</span></a></p><p id="par0110" class="elsevierStylePara elsevierViewall">Detecting LC at an early stage is difficult&#44; particularly because symptoms tend to be slow to develop&#46; Even so&#44; in this study&#44; only 35&#46;9&#37; of cases were asymptomatic at diagnosis&#44; despite being early-stage disease&#46; We should highlight the fact that a large number of patients had non-specific symptoms&#44; such as cough &#40;19&#46;9&#37;&#41; and dyspnea &#40;11&#46;5&#37;&#41;&#46; Almost half of the stage I cases were asymptomatic at diagnosis&#46; As the size and stage of the tumor advance&#44; symptoms become more marked&#46;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">24</span></a> We should also mention incidental diagnoses&#44; since these chance findings accounted for 43&#46;6&#37; of all patients&#44; and were more frequently detected in stage I&#46; Incidental diagnoses may be more frequent than diagnoses in asymptomatic patients because the most common symptoms of LC are non-specific&#44; and while some subjects had symptoms at diagnosis&#44; this was not the reason for their referral to the LC clinic&#46;</p><p id="par0115" class="elsevierStylePara elsevierViewall">In total&#44; 79&#46;1&#37; of patients had smoked more than 30 pack-years&#44; and 87&#46;9&#37; were smokers or former smokers&#46; More stage I than stage II disease was detected in heavy smokers&#44; possibly because of the high percentage of patients diagnosed during monitoring for another medical condition &#40;76&#46;3&#37;&#41;&#46; In addition&#44; LC may remain longer at stage I than at stage II&#44; thus increasing the window of opportunity for tumor detection and facilitating earlier diagnosis&#46;</p><p id="par0120" class="elsevierStylePara elsevierViewall">In a study conducted in the same healthcare area in 2007&#44; the most common histology was squamous cell carcinoma &#40;48&#46;7&#37;&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">25</span></a> Our study&#44; however&#44; clearly reflects epidemiological changes&#44; insofar as the most predominant histological type was adenocarcinoma&#44; accounting for 52&#46;9&#37; of the overall findings&#46;</p><p id="par0125" class="elsevierStylePara elsevierViewall">Stage at diagnosis is the most important prognostic variable for survival&#44; although advanced age or male sex are factors that also impact significantly on mortality&#46;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">26</span></a> Sex and age play an important role in survival in early-stage disease&#46; Only 54&#46;8&#37; of patients aged 70 years or older were still alive 36 months after diagnosis&#44; compared to 73&#46;6&#37; of patients younger than 70&#46; This may be related with a better response to surgery or drug treatment&#44; since older patients have more comorbidities and higher mortality rates associated with surgery than younger patients&#46;</p><p id="par0130" class="elsevierStylePara elsevierViewall">Surgery is the optimal treatment for early-stage LC&#46; An analysis by the Danish Lung Cancer Registry found that survival in early-stage disease was around 80&#37; in the first year after surgery&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">27</span></a> A very recent American study found that 5-year survival in stage I patients who met the inclusion criteria for the National Lung Screening Trial &#40;NLST&#41; was 63&#37; compared to 47&#37; among those who did not meet these criteria&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">28</span></a> Our study results are somewhat better&#44; revealing a median survival of 57 months &#40;almost 5 years&#41; in patients with stage I and II disease&#44; including those who did not meet NSLT criteria&#46; Survival data from the UK show 1-year survival rates of 85&#46;1&#37; and 71&#37; in stage I and II disease&#44; respectively&#46;<a class="elsevierStyleCrossRef" href="#bib0305"><span class="elsevierStyleSup">29</span></a> Survival in our series was as high as 88&#46;4&#37; &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46; Considering that we assessed vital status at 18 months&#44; these outcomes seem to be somewhat better than those of the Danish study&#46; It should be noted that our hospital is a reference center for LC thoracic surgery and many of our patients underwent uniportal VATS procedures&#44; which may have had a positive impact on survival&#46;</p><p id="par0135" class="elsevierStylePara elsevierViewall">COPD&#44; as a risk factor for the development of postoperative pulmonary complications&#44; also affected survival&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">30</span></a> In fact&#44; patients with advanced COPD are not candidates for surgery&#46; High tobacco consumption and COPD were seen to reduce life expectancy in patients included in this study&#46; Although the data analysis failed to reach statistical significance&#44; <a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a> shows differences in the survival curves&#46;</p><p id="par0140" class="elsevierStylePara elsevierViewall">Stage at diagnosis is one of the most important factors affecting survival in a patient with LC&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">31</span></a> We found statistically significantly improved survival when LC was diagnosed in asymptomatic patients or incidentally&#44; and in both cases this benefit is more frequently associated with stage I disease&#46; We also found that more invasive disease tended to result in poorer survival&#44; since 3-year survival in stage IA patients was 76&#46;1&#37;&#44; but 39&#46;6&#37; in stage IIB&#46;</p><p id="par0145" class="elsevierStylePara elsevierViewall">In our study&#44; we found no differences in survival between patients who met screening criteria and those who did not&#46; It is interesting to note that the cases in our series should&#44; in principle&#44; be those most frequently detected in an LC screening program&#46; However&#44; only 45&#37; of our cases met the screening criteria&#44; so the remaining 55&#37; would not&#44; in theory&#44; have been detected by a screening program&#46; Tanner et al&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">28</span></a> reported similar non-compliance with screening inclusion criteria in stage I patients&#46;</p><p id="par0150" class="elsevierStylePara elsevierViewall">Our study has two major limitations&#46; Firstly&#44; it is a retrospective case review&#44; so detailed information about the cause of death could not be collected&#44; as little information is provided in the electronic medical record if death occurred outside the hospital setting&#46; As a result&#44; the dependent variable from which survival was calculated was all-cause death&#44; and we were unable to collect data on mortality attributable to a possible pulmonary recurrence or the appearance of a new primary tumor&#46; The second limitation is that cases of LC diagnosed in 2011 and 2012 could have been lost&#46; During this period&#44; the CHUAC was in the process of implementing its electronic clinical record system&#44; and data from some LC consultations were not entered&#46;<a class="elsevierStyleCrossRef" href="#bib0320"><span class="elsevierStyleSup">32</span></a> This suggests that a small percentage of cases may have been missed between the years 2011 and 2012&#46;</p><p id="par0155" class="elsevierStylePara elsevierViewall">The strengths of this study are its long inclusion period and its relatively large sample size&#44; given that LC is rarely diagnosed in early stages&#46; Moreover&#44; consecutive sampling means that the cases are representative of patients seen in our setting&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Conclusions</span><p id="par0160" class="elsevierStylePara elsevierViewall">In conclusion&#44; the distribution of LC in the Corunna healthcare area&#44; in terms of sex&#44; age&#44; and histological type&#44; is in line with current epidemiological patterns&#46; Variables with the greatest impact on survival are stage at diagnosis&#44; sex&#44; age&#44; and surgical treatment&#46; Despite early-stage diagnosis and the high number of incidental findings&#44; the proportion of completely asymptomatic patients was low&#44; and median survival of patients diagnosed with stage I and II disease was less than 5 years&#46; Finally&#44; only 45&#37; of the cases met the US criteria for screening&#44; and survival in patients who did meet these criteria was similar to those who did not&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Conflict of interest</span><p id="par0165" class="elsevierStylePara elsevierViewall">The authors state that they have no conflict of interests&#46;</p></span></span>"
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        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Introduction</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">The objective of our study was to describe the characteristics of patients diagnosed with stage I and II lung cancer in the health area of A Coru&#241;a &#40;Galicia&#41; and to determine their overall survival according to certain variables&#46;</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Methods</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Retrospective case series in patients diagnosed between January 2011 and December 2015 with stage I and II primary lung cancer with a minimum follow-up of 18 months&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Results</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">One hundred and fifty-eight patients were included&#44; 99 at stage I&#44; with a median age of 69 years &#91;range 20&#8211;90&#93;&#44; predominantly men &#40;81&#37;&#41;&#46; Adenocarcinoma was the most common histology &#40;52&#46;9&#37;&#41;&#44; followed by epidermoid carcinoma &#40;33&#46;1&#37;&#41;&#46; Asymptomatic patients &#40;35&#46;9&#37;&#41; presented more frequently in stage I&#46; Median survival was 57 months &#40;95&#37; CI&#58; 48&#46;1&#8211;65&#46;9&#41;&#44; with higher survival among women&#44; patients under 70 years of age&#44; and those who received surgical treatment&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Conclusions</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Early-stage lung cancer in the health area of A Coru&#241;a occurs predominantly in men&#44; in advanced age&#44; and with adenocarcinoma histology&#46; Survival was greater among patients with stage I disease&#44; women&#44; individuals aged under 70 years&#44; and those treated surgically&#46; Despite early diagnosis&#44; median survival was less than 5 years&#46;</p></span>"
        "secciones" => array:4 [
          0 => array:2 [
            "identificador" => "abst0005"
            "titulo" => "Introduction"
          ]
          1 => array:2 [
            "identificador" => "abst0010"
            "titulo" => "Methods"
          ]
          2 => array:2 [
            "identificador" => "abst0015"
            "titulo" => "Results"
          ]
          3 => array:2 [
            "identificador" => "abst0020"
            "titulo" => "Conclusions"
          ]
        ]
      ]
      "es" => array:3 [
        "titulo" => "Resumen"
        "resumen" => "<span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Introducci&#243;n</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">El objetivo de nuestro estudio es detallar las caracter&#237;sticas de los pacientes diagnosticados en estadios <span class="elsevierStyleSmallCaps">i</span> y <span class="elsevierStyleSmallCaps">ii</span> de c&#225;ncer de pulm&#243;n en el &#225;rea sanitaria de A Coru&#241;a &#40;Galicia&#41; y conocer su supervivencia global en funci&#243;n de ciertas variables&#46;</p></span> <span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">M&#233;todos</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Serie de casos de car&#225;cter retrospectivo en sujetos diagnosticados entre enero de 2011 y diciembre de 2015 de c&#225;ncer pulmonar primario en estadios <span class="elsevierStyleSmallCaps">i</span> y <span class="elsevierStyleSmallCaps">ii</span> con un seguimiento m&#237;nimo de 18 meses&#46;</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Se incluyeron 158 pacientes&#44; 99 en estadio <span class="elsevierStyleSmallCaps">i</span>&#44; con una edad mediana de 69 a&#241;os &#91;rango 20&#8211;90&#93; y mayoritariamente hombres &#40;81&#37;&#41;&#46; El adenocarcinoma fue la histolog&#237;a m&#225;s frecuente &#40;52&#44;9&#37;&#41; por encima del carcinoma epidermoide &#40;33&#44;1&#37;&#41;&#46; Los sujetos asintom&#225;ticos &#40;35&#44;9&#37;&#41; se presentaron m&#225;s frecuentemente en estadio <span class="elsevierStyleSmallCaps">i</span>&#46; La mediana de supervivencia fue de 57 meses &#40;IC 95&#37;&#58; 48&#44;1&#8211;65&#44;9&#41;&#44; con una mayor supervivencia para el sexo femenino&#44; los menores de 70 a&#241;os y los pacientes que recibieron tratamiento quir&#250;rgico&#46;</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Conclusiones</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">El c&#225;ncer de pulm&#243;n en estadios iniciales en el &#225;rea de sanitaria de A Coru&#241;a presenta un predominio de hombres&#44; edad avanzada y mayoritariamente adenocarcinomas&#46; La supervivencia fue mayor en el estadio <span class="elsevierStyleSmallCaps">i</span>&#44; mujeres&#44; menores de 70 a&#241;os y subsidiarios de tratamiento quir&#250;rgico&#46; Pese a este diagn&#243;stico precoz&#44; la mediana de supervivencia no alcanza los 5 a&#241;os&#46;</p></span>"
        "secciones" => array:4 [
          0 => array:2 [
            "identificador" => "abst0025"
            "titulo" => "Introducci&#243;n"
          ]
          1 => array:2 [
            "identificador" => "abst0030"
            "titulo" => "M&#233;todos"
          ]
          2 => array:2 [
            "identificador" => "abst0035"
            "titulo" => "Resultados"
          ]
          3 => array:2 [
            "identificador" => "abst0040"
            "titulo" => "Conclusiones"
          ]
        ]
      ]
    ]
    "NotaPie" => array:1 [
      0 => array:2 [
        "etiqueta" => "&#9734;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0010">Please cite this article as&#58; P&#233;rez-Mart&#237;nez O&#44; Vidal-Garc&#237;a I&#44; Montero-Mart&#237;nez C&#44; Provencio M&#44; Ruano-Ravina A&#46; Caracter&#237;sticas al diagn&#243;stico y supervivencia de estadios <span class="elsevierStyleSmallCaps">i</span> y <span class="elsevierStyleSmallCaps">ii</span> de c&#225;ncer de pulm&#243;n&#46; Arch Bronconeumol&#46; 2018&#59;54&#58;420&#8211;426&#46;</p>"
      ]
    ]
    "apendice" => array:1 [
      0 => array:1 [
        "seccion" => array:1 [
          0 => array:4 [
            "apendice" => "<p id="par0180" class="elsevierStylePara elsevierViewall"><elsevierMultimedia ident="upi0005"></elsevierMultimedia></p>"
            "etiqueta" => "Appendix A"
            "titulo" => "Supplementary data"
            "identificador" => "sec0040"
          ]
        ]
      ]
    ]
    "multimedia" => array:4 [
      0 => array:7 [
        "identificador" => "fig0005"
        "etiqueta" => "Figure 1"
        "tipo" => "MULTIMEDIAFIGURA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "figura" => array:1 [
          0 => array:4 [
            "imagen" => "gr1.jpeg"
            "Alto" => 3525
            "Ancho" => 2525
            "Tamanyo" => 548158
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Survival functions for &#40;A&#41; sex&#44; &#40;B&#41; age &#40;older or younger than 70 years at diagnosis&#41;&#44; &#40;C&#41; clinical symptoms suggestive of lung cancer&#44; &#40;D&#41; tobacco consumption in pack-years&#44; &#40;E&#41; presence or absence of COPD&#44; &#40;F&#41; compliance or non-compliance with criteria for lung cancer screening&#44; and &#40;G&#41; stage at diagnosis&#46;</p>"
        ]
      ]
      1 => array:8 [
        "identificador" => "tbl0005"
        "etiqueta" => "Table 1"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "detalles" => array:1 [
          0 => array:3 [
            "identificador" => "at1"
            "detalle" => "Table "
            "rol" => "short"
          ]
        ]
        "tabla" => array:1 [
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Variable&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Stage I &#40;99&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Stage II &#40;59&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Total&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">p</span> &#40;<span class="elsevierStyleItalic">&#967;</span><span class="elsevierStyleSup">2</span>&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Sex</td><td class="td" title="table-entry  " align="left" valign="top">Men&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">77 &#40;60&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">51 &#40;39&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">128 &#40;81&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">0&#46;179</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Women&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">22 &#40;73&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">8 &#40;26&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">30 &#40;19&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Age</td><td class="td" title="table-entry  " align="left" valign="top">&#60;70 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">50 &#40;61&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">32 &#40;39&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">82 &#40;51&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">0&#46;650</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">&#8805;70 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">49 &#40;64&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">27 &#40;35&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">76 &#40;48&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Cause that prompted diagnosis</td><td class="td" title="table-entry  " align="left" valign="top">Suspected cancer&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">7 &#40;46&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">8 &#40;53&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">15 &#40;9&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">0&#46;160</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Medical condition&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">74 &#40;62&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">45 &#40;37&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">119 &#40;76&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Surgical procedure&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">17 &#40;77&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">5 &#40;22&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">22 &#40;14&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Reason for diagnosis</td><td class="td" title="table-entry  " align="left" valign="top">Symptoms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">33 &#40;45&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">39 &#40;54&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72 &#40;46&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">&#60; 0&#46;001</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Monitoring respiratory disease&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">11 &#40;68&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">5 &#40;31&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">16 &#40;10&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Purely incidental&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">54 &#40;79&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">14 &#40;20&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">68 &#40;43&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Diagnostic test</td><td class="td" title="table-entry  " align="left" valign="top">X-ray&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">70 &#40;58&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">49 &#40;41&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">119 &#40;75&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">0&#46;100</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">CT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">28 &#40;73&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">10 &#40;26&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">38 &#40;24&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="6" align="left" valign="top">Symptoms at diagnosis</td><td class="td" title="table-entry  " align="left" valign="top">None&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">48 &#40;85&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">8 &#40;14&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">56 &#40;35&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="6" align="left" valign="top">0&#46;001</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Cough&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">16 &#40;51&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">15 &#40;48&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">31 &#40;19&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Dyspnea&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9 &#40;50&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9 &#40;50&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">18 &#40;11&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Hemoptysis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9 &#40;47&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">10 &#40;52&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">19 &#40;12&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Constitutional syndrome&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">3 &#40;33&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">6 &#40;66&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9 &#40;5&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Others&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">13 &#40;56&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">10 &#40;43&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">23 &#40;14&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Smoker</td><td class="td" title="table-entry  " align="left" valign="top">Never smoker&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">15 &#40;78&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">4 &#40;21&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">19 &#40;12&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">0&#46;276</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Smoker&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">36 &#40;59&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">25 &#40;41&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">61 &#40;38&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Former smoker&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">47 &#40;61&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">30 &#40;39&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">77 &#40;49&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Smoking</td><td class="td" title="table-entry  " align="left" valign="top">&#60; 30 pack-years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">22 &#40;71&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9 &#40;29&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">31 &#40;20&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">0&#46;193</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">&#8805; 30 pack-years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">68 &#40;58&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">49 &#40;41&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">117 &#40;79&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">COPD</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">60 &#40;67&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">29 &#40;32&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">89 &#40;56&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">0&#46;160</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">39 &#40;56&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">30 &#40;43&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">69 &#40;43&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Histological type</td><td class="td" title="table-entry  " align="left" valign="top">Squamous cell&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">30 &#40;57&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">22 &#40;42&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">52 &#40;33&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">0&#46;190</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Adenocarcinoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">57 &#40;68&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">26 &#40;31&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">83 &#40;52&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Others&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">11 &#40;50&#46;05&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">11 &#40;50&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">22 &#40;14&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Surgery</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9 &#40;47&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">10 &#40;52&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">19 &#40;12&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">0&#46;142</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">90 &#40;64&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">49 &#40;35&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">139 &#40;88&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Meets screening criteria</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">49 &#40;61&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">31 &#40;38&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">80 &#40;54&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">0&#46;937</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">40 &#40;60&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">26 &#40;39&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">66 &#40;45&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Variable&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Median &#40;months&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">p</span> &#40;log rank&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">18 months &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">36 months &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Sex</td><td class="td" title="table-entry  " align="left" valign="top">Men&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">53&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="char" valign="top">0&#46;016</td><td class="td" title="table-entry  " align="char" valign="top">81&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">61&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Women&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">93&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">79&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Age</td><td class="td" title="table-entry  " align="left" valign="top">&#60;70 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="char" valign="top">0&#46;080</td><td class="td" title="table-entry  " align="char" valign="top">90&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">73&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">&#8805;70 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">53&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">77&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">54&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Reason for diagnosis</td><td class="td" title="table-entry  " align="left" valign="top">Symptoms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">57&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="3" align="char" valign="top">0&#46;558</td><td class="td" title="table-entry  " align="char" valign="top">81&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">67&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Monitoring respiratory disease&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">53&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">81&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">69&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Purely incidental&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">86&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">70&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Symptoms at diagnosis</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="char" valign="top">0&#46;100</td><td class="td" title="table-entry  " align="char" valign="top">87&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">76&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">53&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">81&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">57&#46;7&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">68&#46;7&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">76&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">59&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Histological type</td><td class="td" title="table-entry  " align="left" valign="top">Squamous cell carcinoma&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">56&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Adenocarcinoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">90&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">70&#46;7&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">81&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">61&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Surgery</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">88&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Meets screening criteria</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="char" valign="top">0&#46;429</td><td class="td" title="table-entry  " align="char" valign="top">87&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">62&#46;1&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">81&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">67&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="4" align="left" valign="top">Stage at diagnosis</td><td class="td" title="table-entry  " align="left" valign="top">IA&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="4" align="char" valign="top">0&#46;387</td><td class="td" title="table-entry  " align="char" valign="top">89&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">76&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">IB&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">59&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">61&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">74&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">61&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">IIB&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">39&#46;6&nbsp;\t\t\t\t\t\t\n
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                      "titulo" => "Global&#44; regional&#44; and national cancer incidence&#44; mortality&#44; years of life lost&#44; years lived with disability&#44; and disability-adjusted life-years for 32 cancer groups&#44; 1990 to 2015&#58; a systematic analysis for the global burden of disease study"
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                  "referenciaCompleta" => "Sociedad Espa&#241;ola de Oncolog&#237;a M&#233;dica &#40;SEOM&#41;&#46; Las cifras de c&#225;ncer en Espa&#241;a 2017 &#91;accessed Sep 2017&#93;&#46; Available from&#58; <a id="intr0011" class="elsevierStyleInterRef" href="http://www.seom.org/seomcms/images/stories/recursos/Las_cifras_del_cancer_en_Esp_2017.pdf">http&#58;&#47;&#47;www&#46;seom&#46;org&#47;seomcms&#47;images&#47;stories&#47;recursos&#47;Las&#95;cifras&#95;del&#95;cancer&#95;en&#95;Esp&#95;2017&#46;pdf</a>"
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                          "etal" => false
                          "autores" => array:5 [
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                            4 => "J&#46;R&#46; Quir&#243;s"
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                      "titulo" => "Cigarette smoking and lung cancer&#8212;relative risk estimates for the major histological types from a pooled analysis of case&#8211;control studies"
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                          "autores" => array:6 [
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                            1 => "B&#46; Kendzia"
                            2 => "P&#46; Gustavsson"
                            3 => "J&#46; Karl-Heinz"
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                            5 => "P&#46; Hermann"
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                          "etal" => false
                          "autores" => array:3 [
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                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
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                            1 => "T&#46;J&#46; Dilling"
                            2 => "L&#46;J&#46; Harris"
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Original Article
Description and Survival of Stage I and II Lung Cancer Patients
Características al diagnóstico y supervivencia de estadios i y ii de cáncer de pulmón
Olaia Pérez-Martíneza, Iria Vidal-Garcíab, Carmen Montero-Martínezb, Mariano Provencioc, Alberto Ruano-Ravinad,e,
Corresponding author
alberto.ruano@usc.es

Corresponding author.
a Servicio de Medicina Preventiva, Complejo Hospitalario Universitario de A Coruña, A Coruña, Spain
b Servicio de Neumología, Complejo Hospitalario Universitario de A Coruña, A Coruña, Spain
c Servicio de Oncología, Hospital Universitario Puerta de Hierro Majadahonda, Majadahonda, Spain
d Departamento de Medicina Preventiva y Salud Pública, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
e CIBER de Epidemiología y Salud Pública, CIBERESP, Spain
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          "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Survival functions for &#40;A&#41; sex&#44; &#40;B&#41; age &#40;older or younger than 70 years at diagnosis&#41;&#44; &#40;C&#41; clinical symptoms suggestive of lung cancer&#44; &#40;D&#41; tobacco consumption in pack-years&#44; &#40;E&#41; presence or absence of COPD&#44; &#40;F&#41; compliance or non-compliance with criteria for lung cancer screening&#44; and &#40;G&#41; stage at diagnosis&#46;</p>"
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">Lung cancer &#40;LC&#41; is the most common global cause of cancer death in men and the third most common in women&#46;<a class="elsevierStyleCrossRef" href="#bib0165"><span class="elsevierStyleSup">1</span></a> It is the leading cause of cancer death in Spain&#44; where it was estimated that 22&#44;450 new diagnoses would be made in men and 5917 in women by 2015&#46; While mortality in men has fallen slightly in recent years&#44; it is increasing in women&#44; in whom rates have almost doubled in the last decade&#46; In Spain&#44; LC is the third most common tumor in men and the fourth most common in women&#44;<a class="elsevierStyleCrossRefs" href="#bib0170"><span class="elsevierStyleSup">2&#44;3</span></a> and its impact on health and social welfare is considerable&#46; Moreover&#44; survival has not increased in the last few years&#44; and the relative 5-year survival is 10&#46;6&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0180"><span class="elsevierStyleSup">4</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">In recent years&#44; there has been an increase in the incidence of LC among women&#44; and the pattern of predominant histological variants has changed due to changes in the type of tobacco smoked&#46;<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">5</span></a> Squamous cell carcinoma remains the most common histological type only among male smokers&#46;<a class="elsevierStyleCrossRef" href="#bib0190"><span class="elsevierStyleSup">6</span></a> Survival has also improved slightly in certain patient groups&#44; primarily those with mutations that respond to targeted treatments&#46;<a class="elsevierStyleCrossRefs" href="#bib0195"><span class="elsevierStyleSup">7&#44;8</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">Data from the United States suggest that approximately 57&#37; of LCs are diagnosed when the disease has already metastasized&#44; and 22&#37; of cases have regional lymph node dissemination at diagnosis&#46; Only 16&#37; are diagnosed when the tumor is still confined to the primary site&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">9</span></a> In the Corunna healthcare area&#44; 21&#37; of cases are diagnosed in stages I and II&#46; Symptoms are not only rare in early-stage disease&#44; they are also non-specific&#44; particularly in the early stages&#46; This leads to a significant delay in diagnosis&#44; as other more common diseases are generally ruled out first&#46; It is therefore unusual for LC to be diagnosed in stage I or II&#44; and these stages are generally discovered incidentally during differential diagnosis for other diseases&#46;<a class="elsevierStyleCrossRef" href="#bib0210"><span class="elsevierStyleSup">10</span></a> Consequently&#44; 5-year survival in this type of cancer&#44; at less than 15&#37; worldwide&#44; remains low&#46;<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">5</span></a> In the United States&#44; 5-year survival in localized disease is 55&#46;6&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">9</span></a> Screening programs among smokers have been proposed in an attempt to improve survival&#44; but the risk&#8211;benefit ratio is unclear&#44; and currently screening is not systematically offered by the public health system of any European country&#46;<a class="elsevierStyleCrossRefs" href="#bib0210"><span class="elsevierStyleSup">10&#8211;15</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall">Given the lack of evidence in stage I and II LC patients&#44; our objective was to determine their characteristics at diagnosis and to analyze survival&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Methods</span><p id="par0025" class="elsevierStylePara elsevierViewall">This retrospective case series includes all patients diagnosed with stage I and II LC between January 2011 and December 2015 in the Corunna healthcare area &#40;Galicia&#44; Spain&#41;&#46; Patient inclusion concluded in December 2015&#44; to allow for a minimum follow-up of 1&#46;5 years after diagnosis &#40;until June 30&#44; 2017&#41;&#46; The reference hospital is the Complejo Hospitalario Universitario de A Coru&#241;a &#40;CHUAC&#41;&#44; which has a catchment area of 584&#44;283 inhabitants&#46;<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">16</span></a></p><p id="par0030" class="elsevierStylePara elsevierViewall">The study included all cases managed medically in the CHUAC LC clinic with a final diagnosis of stage IA&#44; IB&#44; IIA or IIB LC&#44; according to the 7th edition of the TNM classification&#46;<a class="elsevierStyleCrossRef" href="#bib0245"><span class="elsevierStyleSup">17</span></a> Histopathological diagnosis was confirmed for all patients&#44; except for 1 from whom insufficient sample material for histological study was obtained&#44; but whose clinical and radiological picture were consistent with a diagnosis of LC&#46; Staging was performed from clinical history&#44; biochemistry&#44; chest-abdomen CT and PET&#46; EBUS&#47;EUS was used when positive mediastinal lymphadenopathies were observed on a PET &#40;SUV<span class="elsevierStyleHsp" style=""></span>&#62;<span class="elsevierStyleHsp" style=""></span>2&#46;5&#41;&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">The following variables were collected from the electronic medical records&#58; date of birth&#44; sex&#44; age at diagnosis&#44; smoking habit &#40;smoker&#47;former smoker&#47;never smoker&#41;&#44; time since smoking cessation&#44; tobacco consumption &#40;pack-years&#41;&#44; presence of COPD&#44; reason for referral &#40;symptoms&#47;follow-up of respiratory disease&#47;purely incidental&#41;&#44; symptoms at diagnosis &#40;none&#47;cough&#47;dyspnea&#47;hemoptysis&#47;constitutional syndrome&#47;other&#41;&#44; diagnostic test prompting suspicion &#40;chest X-ray&#47;CT&#47;other&#41;&#44; stage at diagnosis &#40;IA&#44; IB&#44; IIA&#44; and IIB&#41;&#44; histological type &#40;squamous cell&#47;adenocarcinoma&#47;small cell&#47;large cell&#47;other&#41;&#44; treatment &#40;surgery&#47;chemotherapy&#47;radiation therapy&#41;&#44; and vital status of the patient &#40;date of death&#47;survival&#41;&#46; As the reason leading to diagnosis in patients with early-stage disease was considered pertinent to this research&#44; patients were classified as follows&#58; &#40;a&#41; patients investigated for LC due to symptoms consistent with the disease&#44; &#40;b&#41; patients monitored for respiratory disease&#44; or &#40;c&#41; patients diagnosed with cancer by chance &#40;incidental finding&#41;&#46; In the latter group&#44; the test prompting the diagnosis was not related with LC &#40;i&#46;e&#46;&#44; symptoms may have been present&#44; but this was not why the cancer was detected&#41;&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">The date of death was obtained using Document Management program of the Corunna healthcare area&#46; This system records the date of death of inhabitants in the healthcare area&#44; although with some delay&#46; The electronic medical records do not include the date of death if death occurs outside the hospital setting&#46; Inclusion ended on December 31&#44; 2015&#44; so survival data of all patients are up-to-date&#46; COPD was diagnosed as an FEV1&#47;FVC ratio of &#60;70&#37; in a post-bronchodilator spirometry&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">Bearing in mind the current debate on implementing population screening for LC&#44; we also included a dichotomous variable&#58; meets screening criteria according to the current US criteria&#44; yes&#47;no &#40;smoker or former smoker &#60;15 years&#44; &#8805;55 and &#60;80 years of age&#44; and cumulative tobacco consumption of &#8805;30 pack-years&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0250"><span class="elsevierStyleSup">18</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">Exclusion criteria were&#58; stage at diagnosis greater than IIB&#44; no clinical&#47;pathological confirmation of LC&#44; and patients whose first consultation was in the CHUAC but who were subsequently managed in another healthcare area&#46;</p><p id="par0055" class="elsevierStylePara elsevierViewall">Statistical analysis was performed using SPSS 20&#46;0&#46; The <span class="elsevierStyleItalic">&#967;</span><span class="elsevierStyleSup">2</span>-test was used to determine a possible association between qualitative variables&#46; Survival analysis was performed using Kaplan&#8211;Meier curves and survival functions were compared using the log-rank test to estimate <span class="elsevierStyleItalic">p</span>&#46; Statistical significance was set at <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#46;05&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Results</span><p id="par0060" class="elsevierStylePara elsevierViewall">In total&#44; 158 patients were included in the study&#44; 99 at stage I and 59 at stage II&#59; 81&#37; were men and the median age at diagnosis was 69 years &#40;mean age&#44; 68 years&#41;&#46; No statistically significant differences between sex and age were found for stage at diagnosis&#46; The predominant histology was adenocarcinoma &#40;52&#46;9&#37;&#41; &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#44; which was the histological type most frequently diagnosed in women &#40;73&#46;3&#37;&#41; vs 48&#37; in men&#44; and mainly in individuals under the age of 70 years &#40;62&#46;2&#37;&#41;&#46; In patients older than 70 years&#44; adenocarcinoma and squamous cell carcinoma occurred at similar rates&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0065" class="elsevierStylePara elsevierViewall">A total of 76&#46;3&#37; of participants were referred to the LC fast-track clinic due to a finding encountered during the follow-up of a medical problem&#44; and 9&#46;6&#37; were referred to the fast-track clinic due to a high suspicion of LC&#46; In 43&#46;6&#37; of cases&#44; LC was diagnosed incidentally&#44; more of which were stage I than stage II&#46; This difference was statistically significant &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">In total&#44; 35&#46;9&#37; of subjects were completely asymptomatic at diagnosis&#44; while 64&#46;1&#37; had some kind of symptoms associated with LC&#44; such as cough&#44; dyspnea&#44; hemoptysis&#44; constitutional syndrome&#44; or other rarer manifestations&#46; Only 14&#46;3&#37; of the asymptomatic patients were diagnosed with stage II disease &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46; Some incidental cases had symptoms at the time of diagnosis&#44; but did not seek medical attention for reasons related with LC&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall">Never smokers represented 12&#46;1&#37; of the overall population&#44; while rates among former smokers &#40;49&#37;&#41; and active smokers &#40;38&#46;9&#37;&#41; were higher&#46; One hundred and seventeen patients had a cumulative consumption of more than 30 pack-years&#44; with no significant differences between stages I and II&#46; The presence of COPD &#40;43&#46;7&#37;&#41; was not associated with diagnosis at a more advanced stage&#46; Only 45&#46;2&#37; of patients in our series met LC screening criteria&#46; Nineteen patients &#40;12&#37;&#41; did not receive surgery&#44; due to concomitant COPD or advanced age&#46; The median age of unoperated patients was 79 years &#40;10 years older than the total series&#41;&#44; and 74&#37; of them had COPD&#46; In total&#44; 53&#37; of these patients were stage II&#44; compared to 33&#37; of the overall series&#46; Four of the 5 unoperated patients without COPD were 82 years of age or more&#44; and 1 patient aged 62 years had kidney failure&#44; heart failure&#44; and arteriosclerosis&#46; In all these cases&#44; the risk&#8211;benefit balance made surgery inadvisable&#46;</p><p id="par0080" class="elsevierStylePara elsevierViewall">Median overall survival was 57 months &#40;95&#37; CI&#58; 48&#46;1&#8211;65&#46;9&#41;&#46; Survival among men was shorter than among women&#58; 81&#46;9&#37; of men survived more than 18 months&#44; compared to 93&#46;3&#37; of women &#40;<span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;016&#41;&#46; Three-year survival was 61&#46;3&#37; in men vs 79&#46;4&#37; in women&#46; With regard to age&#44; survival among patients aged 70 years or more was shorter than in younger subjects &#40;<span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;08&#41;&#46; At 3 years post-diagnosis&#44; 54&#46;8&#37; of patients aged 70 years or more were alive&#44; compared to 73&#46;6&#37; of the younger group &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><p id="par0085" class="elsevierStylePara elsevierViewall">No significant differences were found in median survival between symptomatic subjects&#44; those who were being followed up for respiratory disease&#44; and those with an incidental finding of suspected LC on an imaging test&#46; However&#44; median survival varied among groups&#44; being longer in incidental cases&#44; with a median survival of 72 months compared to 57 months in symptomatic patients&#44; and 53 months in patients in clinical follow-up&#46; This is also consistent with the data obtained when patients who were asymptomatic at the time of diagnosis &#40;median survival of 72 months&#41; were compared with patients with symptoms of LC &#40;53 months&#41;&#44; although the difference did not reach statistical significance &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a> and <a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0090" class="elsevierStylePara elsevierViewall">Survival was shorter in smokers of &#8805;30 pack-years &#40;53 months&#41; than in those with a consumption of &#60;30 pack-years &#40;72 months&#41;&#46; These differences approached statistical significance&#46; Patients with COPD also died earlier &#40;18-month survival of 76&#46;5&#37;&#41; than patients without respiratory disease &#40;18-month survival of 89&#46;8&#37;&#41;&#46; The difference between the survival data of these groups 3 years after diagnosis was rather less marked &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a> and <a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46; Median survival among patients who did not undergo surgery was much shorter &#40;20 vs 72 months&#41; &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46;</p><p id="par0095" class="elsevierStylePara elsevierViewall">Survival at 18 months was better in the group who did not meet screening criteria&#44; but the opposite is the case for a 3-year survival &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>F&#41;&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Discussion</span><p id="par0100" class="elsevierStylePara elsevierViewall">These results show that survival in stage I and II LC is still low&#46; Half of our patients died within 57 months of diagnosis &#40;median survival of less than 5 years&#41;&#59; these data are a slight improvement on US figures&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">9</span></a> Surgery probably cannot be considered a curative treatment&#44; although it clearly has a crucial effect on survival&#46; These poor outcomes are remarkable if we remember that 5-year survival after early-stage breast cancer is around 90&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0255"><span class="elsevierStyleSup">19</span></a></p><p id="par0105" class="elsevierStylePara elsevierViewall">The epidemiology of LC is changing&#46; In Spain&#44; LC mortality in women has doubled in the last 10 years&#44;<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">20</span></a> a trend that is reflected in our series&#44; where the male&#58;female ratio is 4&#46;3&#58;1&#44; lower than that reported in previous series&#46;<a class="elsevierStyleCrossRef" href="#bib0265"><span class="elsevierStyleSup">21</span></a> These data are in line with changes in the epidemiological distribution of LC by sex in Spain and Europe&#46;<a class="elsevierStyleCrossRef" href="#bib0270"><span class="elsevierStyleSup">22</span></a> With regard to age&#44; our median of 69 years is similar to that of the rest of Spain&#46;<a class="elsevierStyleCrossRef" href="#bib0275"><span class="elsevierStyleSup">23</span></a></p><p id="par0110" class="elsevierStylePara elsevierViewall">Detecting LC at an early stage is difficult&#44; particularly because symptoms tend to be slow to develop&#46; Even so&#44; in this study&#44; only 35&#46;9&#37; of cases were asymptomatic at diagnosis&#44; despite being early-stage disease&#46; We should highlight the fact that a large number of patients had non-specific symptoms&#44; such as cough &#40;19&#46;9&#37;&#41; and dyspnea &#40;11&#46;5&#37;&#41;&#46; Almost half of the stage I cases were asymptomatic at diagnosis&#46; As the size and stage of the tumor advance&#44; symptoms become more marked&#46;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">24</span></a> We should also mention incidental diagnoses&#44; since these chance findings accounted for 43&#46;6&#37; of all patients&#44; and were more frequently detected in stage I&#46; Incidental diagnoses may be more frequent than diagnoses in asymptomatic patients because the most common symptoms of LC are non-specific&#44; and while some subjects had symptoms at diagnosis&#44; this was not the reason for their referral to the LC clinic&#46;</p><p id="par0115" class="elsevierStylePara elsevierViewall">In total&#44; 79&#46;1&#37; of patients had smoked more than 30 pack-years&#44; and 87&#46;9&#37; were smokers or former smokers&#46; More stage I than stage II disease was detected in heavy smokers&#44; possibly because of the high percentage of patients diagnosed during monitoring for another medical condition &#40;76&#46;3&#37;&#41;&#46; In addition&#44; LC may remain longer at stage I than at stage II&#44; thus increasing the window of opportunity for tumor detection and facilitating earlier diagnosis&#46;</p><p id="par0120" class="elsevierStylePara elsevierViewall">In a study conducted in the same healthcare area in 2007&#44; the most common histology was squamous cell carcinoma &#40;48&#46;7&#37;&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">25</span></a> Our study&#44; however&#44; clearly reflects epidemiological changes&#44; insofar as the most predominant histological type was adenocarcinoma&#44; accounting for 52&#46;9&#37; of the overall findings&#46;</p><p id="par0125" class="elsevierStylePara elsevierViewall">Stage at diagnosis is the most important prognostic variable for survival&#44; although advanced age or male sex are factors that also impact significantly on mortality&#46;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">26</span></a> Sex and age play an important role in survival in early-stage disease&#46; Only 54&#46;8&#37; of patients aged 70 years or older were still alive 36 months after diagnosis&#44; compared to 73&#46;6&#37; of patients younger than 70&#46; This may be related with a better response to surgery or drug treatment&#44; since older patients have more comorbidities and higher mortality rates associated with surgery than younger patients&#46;</p><p id="par0130" class="elsevierStylePara elsevierViewall">Surgery is the optimal treatment for early-stage LC&#46; An analysis by the Danish Lung Cancer Registry found that survival in early-stage disease was around 80&#37; in the first year after surgery&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">27</span></a> A very recent American study found that 5-year survival in stage I patients who met the inclusion criteria for the National Lung Screening Trial &#40;NLST&#41; was 63&#37; compared to 47&#37; among those who did not meet these criteria&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">28</span></a> Our study results are somewhat better&#44; revealing a median survival of 57 months &#40;almost 5 years&#41; in patients with stage I and II disease&#44; including those who did not meet NSLT criteria&#46; Survival data from the UK show 1-year survival rates of 85&#46;1&#37; and 71&#37; in stage I and II disease&#44; respectively&#46;<a class="elsevierStyleCrossRef" href="#bib0305"><span class="elsevierStyleSup">29</span></a> Survival in our series was as high as 88&#46;4&#37; &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46; Considering that we assessed vital status at 18 months&#44; these outcomes seem to be somewhat better than those of the Danish study&#46; It should be noted that our hospital is a reference center for LC thoracic surgery and many of our patients underwent uniportal VATS procedures&#44; which may have had a positive impact on survival&#46;</p><p id="par0135" class="elsevierStylePara elsevierViewall">COPD&#44; as a risk factor for the development of postoperative pulmonary complications&#44; also affected survival&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">30</span></a> In fact&#44; patients with advanced COPD are not candidates for surgery&#46; High tobacco consumption and COPD were seen to reduce life expectancy in patients included in this study&#46; Although the data analysis failed to reach statistical significance&#44; <a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a> shows differences in the survival curves&#46;</p><p id="par0140" class="elsevierStylePara elsevierViewall">Stage at diagnosis is one of the most important factors affecting survival in a patient with LC&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">31</span></a> We found statistically significantly improved survival when LC was diagnosed in asymptomatic patients or incidentally&#44; and in both cases this benefit is more frequently associated with stage I disease&#46; We also found that more invasive disease tended to result in poorer survival&#44; since 3-year survival in stage IA patients was 76&#46;1&#37;&#44; but 39&#46;6&#37; in stage IIB&#46;</p><p id="par0145" class="elsevierStylePara elsevierViewall">In our study&#44; we found no differences in survival between patients who met screening criteria and those who did not&#46; It is interesting to note that the cases in our series should&#44; in principle&#44; be those most frequently detected in an LC screening program&#46; However&#44; only 45&#37; of our cases met the screening criteria&#44; so the remaining 55&#37; would not&#44; in theory&#44; have been detected by a screening program&#46; Tanner et al&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">28</span></a> reported similar non-compliance with screening inclusion criteria in stage I patients&#46;</p><p id="par0150" class="elsevierStylePara elsevierViewall">Our study has two major limitations&#46; Firstly&#44; it is a retrospective case review&#44; so detailed information about the cause of death could not be collected&#44; as little information is provided in the electronic medical record if death occurred outside the hospital setting&#46; As a result&#44; the dependent variable from which survival was calculated was all-cause death&#44; and we were unable to collect data on mortality attributable to a possible pulmonary recurrence or the appearance of a new primary tumor&#46; The second limitation is that cases of LC diagnosed in 2011 and 2012 could have been lost&#46; During this period&#44; the CHUAC was in the process of implementing its electronic clinical record system&#44; and data from some LC consultations were not entered&#46;<a class="elsevierStyleCrossRef" href="#bib0320"><span class="elsevierStyleSup">32</span></a> This suggests that a small percentage of cases may have been missed between the years 2011 and 2012&#46;</p><p id="par0155" class="elsevierStylePara elsevierViewall">The strengths of this study are its long inclusion period and its relatively large sample size&#44; given that LC is rarely diagnosed in early stages&#46; Moreover&#44; consecutive sampling means that the cases are representative of patients seen in our setting&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Conclusions</span><p id="par0160" class="elsevierStylePara elsevierViewall">In conclusion&#44; the distribution of LC in the Corunna healthcare area&#44; in terms of sex&#44; age&#44; and histological type&#44; is in line with current epidemiological patterns&#46; Variables with the greatest impact on survival are stage at diagnosis&#44; sex&#44; age&#44; and surgical treatment&#46; Despite early-stage diagnosis and the high number of incidental findings&#44; the proportion of completely asymptomatic patients was low&#44; and median survival of patients diagnosed with stage I and II disease was less than 5 years&#46; Finally&#44; only 45&#37; of the cases met the US criteria for screening&#44; and survival in patients who did meet these criteria was similar to those who did not&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Conflict of interest</span><p id="par0165" class="elsevierStylePara elsevierViewall">The authors state that they have no conflict of interests&#46;</p></span></span>"
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    "fechaRecibido" => "2017-10-30"
    "fechaAceptado" => "2018-02-07"
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          "clase" => "keyword"
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            2 => "Cancer by histologic type"
            3 => "Epidemiology"
            4 => "Early diagnosis"
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            0 => "Neoplasias pulmonares"
            1 => "Supervivencia"
            2 => "Neoplasias por tipo histol&#243;gico"
            3 => "Epidemiolog&#237;a"
            4 => "Diagn&#243;stico precoz"
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        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Introduction</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">The objective of our study was to describe the characteristics of patients diagnosed with stage I and II lung cancer in the health area of A Coru&#241;a &#40;Galicia&#41; and to determine their overall survival according to certain variables&#46;</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Methods</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Retrospective case series in patients diagnosed between January 2011 and December 2015 with stage I and II primary lung cancer with a minimum follow-up of 18 months&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Results</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">One hundred and fifty-eight patients were included&#44; 99 at stage I&#44; with a median age of 69 years &#91;range 20&#8211;90&#93;&#44; predominantly men &#40;81&#37;&#41;&#46; Adenocarcinoma was the most common histology &#40;52&#46;9&#37;&#41;&#44; followed by epidermoid carcinoma &#40;33&#46;1&#37;&#41;&#46; Asymptomatic patients &#40;35&#46;9&#37;&#41; presented more frequently in stage I&#46; Median survival was 57 months &#40;95&#37; CI&#58; 48&#46;1&#8211;65&#46;9&#41;&#44; with higher survival among women&#44; patients under 70 years of age&#44; and those who received surgical treatment&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Conclusions</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Early-stage lung cancer in the health area of A Coru&#241;a occurs predominantly in men&#44; in advanced age&#44; and with adenocarcinoma histology&#46; Survival was greater among patients with stage I disease&#44; women&#44; individuals aged under 70 years&#44; and those treated surgically&#46; Despite early diagnosis&#44; median survival was less than 5 years&#46;</p></span>"
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        "resumen" => "<span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Introducci&#243;n</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">El objetivo de nuestro estudio es detallar las caracter&#237;sticas de los pacientes diagnosticados en estadios <span class="elsevierStyleSmallCaps">i</span> y <span class="elsevierStyleSmallCaps">ii</span> de c&#225;ncer de pulm&#243;n en el &#225;rea sanitaria de A Coru&#241;a &#40;Galicia&#41; y conocer su supervivencia global en funci&#243;n de ciertas variables&#46;</p></span> <span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">M&#233;todos</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Serie de casos de car&#225;cter retrospectivo en sujetos diagnosticados entre enero de 2011 y diciembre de 2015 de c&#225;ncer pulmonar primario en estadios <span class="elsevierStyleSmallCaps">i</span> y <span class="elsevierStyleSmallCaps">ii</span> con un seguimiento m&#237;nimo de 18 meses&#46;</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Se incluyeron 158 pacientes&#44; 99 en estadio <span class="elsevierStyleSmallCaps">i</span>&#44; con una edad mediana de 69 a&#241;os &#91;rango 20&#8211;90&#93; y mayoritariamente hombres &#40;81&#37;&#41;&#46; El adenocarcinoma fue la histolog&#237;a m&#225;s frecuente &#40;52&#44;9&#37;&#41; por encima del carcinoma epidermoide &#40;33&#44;1&#37;&#41;&#46; Los sujetos asintom&#225;ticos &#40;35&#44;9&#37;&#41; se presentaron m&#225;s frecuentemente en estadio <span class="elsevierStyleSmallCaps">i</span>&#46; La mediana de supervivencia fue de 57 meses &#40;IC 95&#37;&#58; 48&#44;1&#8211;65&#44;9&#41;&#44; con una mayor supervivencia para el sexo femenino&#44; los menores de 70 a&#241;os y los pacientes que recibieron tratamiento quir&#250;rgico&#46;</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Conclusiones</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">El c&#225;ncer de pulm&#243;n en estadios iniciales en el &#225;rea de sanitaria de A Coru&#241;a presenta un predominio de hombres&#44; edad avanzada y mayoritariamente adenocarcinomas&#46; La supervivencia fue mayor en el estadio <span class="elsevierStyleSmallCaps">i</span>&#44; mujeres&#44; menores de 70 a&#241;os y subsidiarios de tratamiento quir&#250;rgico&#46; Pese a este diagn&#243;stico precoz&#44; la mediana de supervivencia no alcanza los 5 a&#241;os&#46;</p></span>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0010">Please cite this article as&#58; P&#233;rez-Mart&#237;nez O&#44; Vidal-Garc&#237;a I&#44; Montero-Mart&#237;nez C&#44; Provencio M&#44; Ruano-Ravina A&#46; Caracter&#237;sticas al diagn&#243;stico y supervivencia de estadios <span class="elsevierStyleSmallCaps">i</span> y <span class="elsevierStyleSmallCaps">ii</span> de c&#225;ncer de pulm&#243;n&#46; Arch Bronconeumol&#46; 2018&#59;54&#58;420&#8211;426&#46;</p>"
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            "titulo" => "Supplementary data"
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          "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Survival functions for &#40;A&#41; sex&#44; &#40;B&#41; age &#40;older or younger than 70 years at diagnosis&#41;&#44; &#40;C&#41; clinical symptoms suggestive of lung cancer&#44; &#40;D&#41; tobacco consumption in pack-years&#44; &#40;E&#41; presence or absence of COPD&#44; &#40;F&#41; compliance or non-compliance with criteria for lung cancer screening&#44; and &#40;G&#41; stage at diagnosis&#46;</p>"
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                  <table border="0" frame="\n
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                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Variable&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Stage I &#40;99&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Stage II &#40;59&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Total&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">p</span> &#40;<span class="elsevierStyleItalic">&#967;</span><span class="elsevierStyleSup">2</span>&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Sex</td><td class="td" title="table-entry  " align="left" valign="top">Men&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">77 &#40;60&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">51 &#40;39&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">128 &#40;81&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">0&#46;179</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Women&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">22 &#40;73&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">8 &#40;26&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">30 &#40;19&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Age</td><td class="td" title="table-entry  " align="left" valign="top">&#60;70 years&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">32 &#40;39&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">82 &#40;51&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">0&#46;650</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">&#8805;70 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">49 &#40;64&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">27 &#40;35&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">76 &#40;48&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Cause that prompted diagnosis</td><td class="td" title="table-entry  " align="left" valign="top">Suspected cancer&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">7 &#40;46&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">8 &#40;53&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">15 &#40;9&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">0&#46;160</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Medical condition&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">45 &#40;37&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">119 &#40;76&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Surgical procedure&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">17 &#40;77&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">5 &#40;22&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">22 &#40;14&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Reason for diagnosis</td><td class="td" title="table-entry  " align="left" valign="top">Symptoms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">33 &#40;45&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">39 &#40;54&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72 &#40;46&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">&#60; 0&#46;001</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Monitoring respiratory disease&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">5 &#40;31&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">16 &#40;10&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Purely incidental&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">54 &#40;79&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">14 &#40;20&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">68 &#40;43&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Diagnostic test</td><td class="td" title="table-entry  " align="left" valign="top">X-ray&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">70 &#40;58&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">49 &#40;41&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">119 &#40;75&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">0&#46;100</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">CT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">28 &#40;73&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">10 &#40;26&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">38 &#40;24&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="6" align="left" valign="top">Symptoms at diagnosis</td><td class="td" title="table-entry  " align="left" valign="top">None&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">48 &#40;85&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">8 &#40;14&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">56 &#40;35&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="6" align="left" valign="top">0&#46;001</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Cough&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">16 &#40;51&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">15 &#40;48&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">31 &#40;19&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Dyspnea&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9 &#40;50&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9 &#40;50&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">18 &#40;11&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Hemoptysis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9 &#40;47&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">10 &#40;52&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">19 &#40;12&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Constitutional syndrome&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">3 &#40;33&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">6 &#40;66&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9 &#40;5&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Others&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">13 &#40;56&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">10 &#40;43&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">23 &#40;14&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Smoker</td><td class="td" title="table-entry  " align="left" valign="top">Never smoker&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">15 &#40;78&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">4 &#40;21&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">19 &#40;12&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">0&#46;276</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Smoker&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">36 &#40;59&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">25 &#40;41&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">61 &#40;38&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Former smoker&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">47 &#40;61&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">30 &#40;39&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">77 &#40;49&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Smoking</td><td class="td" title="table-entry  " align="left" valign="top">&#60; 30 pack-years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">22 &#40;71&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9 &#40;29&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">31 &#40;20&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">0&#46;193</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">&#8805; 30 pack-years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">68 &#40;58&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">49 &#40;41&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">117 &#40;79&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">COPD</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">60 &#40;67&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">29 &#40;32&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">89 &#40;56&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">0&#46;160</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">39 &#40;56&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">30 &#40;43&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">69 &#40;43&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Histological type</td><td class="td" title="table-entry  " align="left" valign="top">Squamous cell&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">30 &#40;57&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">22 &#40;42&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">52 &#40;33&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">0&#46;190</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Adenocarcinoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">57 &#40;68&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">26 &#40;31&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">83 &#40;52&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Others&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">11 &#40;50&#46;05&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">11 &#40;50&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">22 &#40;14&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Surgery</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9 &#40;47&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">10 &#40;52&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">19 &#40;12&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">0&#46;142</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">90 &#40;64&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">49 &#40;35&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">139 &#40;88&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Meets screening criteria</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">49 &#40;61&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">31 &#40;38&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">80 &#40;54&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">0&#46;937</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">40 &#40;60&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">26 &#40;39&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">66 &#40;45&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Variable&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Median &#40;months&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">p</span> &#40;log rank&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">18 months &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">36 months &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Sex</td><td class="td" title="table-entry  " align="left" valign="top">Men&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">53&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="char" valign="top">0&#46;016</td><td class="td" title="table-entry  " align="char" valign="top">81&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">61&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Women&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">93&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">79&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Age</td><td class="td" title="table-entry  " align="left" valign="top">&#60;70 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="char" valign="top">0&#46;080</td><td class="td" title="table-entry  " align="char" valign="top">90&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">73&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">&#8805;70 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">53&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">77&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">54&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Reason for diagnosis</td><td class="td" title="table-entry  " align="left" valign="top">Symptoms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">57&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="3" align="char" valign="top">0&#46;558</td><td class="td" title="table-entry  " align="char" valign="top">81&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">67&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Monitoring respiratory disease&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">53&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">81&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">69&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Purely incidental&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">86&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">70&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Symptoms at diagnosis</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="char" valign="top">0&#46;100</td><td class="td" title="table-entry  " align="char" valign="top">87&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">76&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">53&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">81&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">57&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Smoking<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a></td><td class="td" title="table-entry  " align="left" valign="top">&#60;30 pack-years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="char" valign="top">0&#46;059</td><td class="td" title="table-entry  " align="char" valign="top">90&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">73&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">&#8805;30 pack-years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">53&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">82&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">61&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">COPD</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="char" valign="top">0&#46;162</td><td class="td" title="table-entry  " align="char" valign="top">89&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">68&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">52&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">76&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">59&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Histological type</td><td class="td" title="table-entry  " align="left" valign="top">Squamous cell carcinoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">53&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="3" align="char" valign="top">0&#46;421</td><td class="td" title="table-entry  " align="char" valign="top">74&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">56&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Adenocarcinoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">90&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">70&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Others&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">81&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">61&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Surgery</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">20&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="char" valign="top">&#60;0&#46;001</td><td class="td" title="table-entry  " align="char" valign="top">52&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">12&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">88&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Meets screening criteria</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">72&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="2" align="char" valign="top">0&#46;429</td><td class="td" title="table-entry  " align="char" valign="top">87&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">62&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">53&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">81&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">67&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="4" align="left" valign="top">Stage at diagnosis</td><td class="td" title="table-entry  " align="left" valign="top">IA&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="4" align="char" valign="top">0&#46;387</td><td class="td" title="table-entry  " align="char" valign="top">89&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">76&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">IB&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">59&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">80&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">65&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">IIA&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">61&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">74&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">61&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">IIB&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">34&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">91&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">39&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
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                      "titulo" => "Global&#44; regional&#44; and national cancer incidence&#44; mortality&#44; years of life lost&#44; years lived with disability&#44; and disability-adjusted life-years for 32 cancer groups&#44; 1990 to 2015&#58; a systematic analysis for the global burden of disease study"
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                        "fecha" => "2017"
                        "volumen" => "3"
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                  "referenciaCompleta" => "Sociedad Espa&#241;ola de Oncolog&#237;a M&#233;dica &#40;SEOM&#41;&#46; Las cifras de c&#225;ncer en Espa&#241;a 2017 &#91;accessed Sep 2017&#93;&#46; Available from&#58; <a id="intr0011" class="elsevierStyleInterRef" href="http://www.seom.org/seomcms/images/stories/recursos/Las_cifras_del_cancer_en_Esp_2017.pdf">http&#58;&#47;&#47;www&#46;seom&#46;org&#47;seomcms&#47;images&#47;stories&#47;recursos&#47;Las&#95;cifras&#95;del&#95;cancer&#95;en&#95;Esp&#95;2017&#46;pdf</a>"
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                          "autores" => array:5 [
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                            2 => "M&#46; Carulla"
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Article information
ISSN: 15792129
Original language: English
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