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                      "titulo" => "Global Initiative on Obstructive Lung Disease &#40;GOLD&#41; classification of lung disease and mortality&#58; findings from the Atherosclerosis Risk in Communities &#40;ARIC&#41; study"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.rmed.2005.03.035"
                      "Revista" => array:6 [
                        "tituloSerie" => "Respir Med"
                        "fecha" => "2006"
                        "volumen" => "100"
                        "paginaInicial" => "115"
                        "paginaFinal" => "122"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            14 => array:3 [
              "identificador" => "bib15"
              "etiqueta" => "15"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Survival of patients with chronic obstructive pulmonary disease receiving long-term domiciliary oxygen therapy"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/ajrccm/147.3.585"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am Rev Respir Dis"
                        "fecha" => "1993"
                        "volumen" => "147"
                        "paginaInicial" => "585"
                        "paginaFinal" => "591"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            15 => array:3 [
              "identificador" => "bib16"
              "etiqueta" => "16"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Report of long-term oxygen therapy in chronic hypoxic cor pulmonale complicating chronic bronchitis and emphysema"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:5 [
                        "tituloSerie" => "Lancet"
                        "fecha" => "1981"
                        "volumen" => "36"
                        "paginaInicial" => "752"
                        "paginaFinal" => "758"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            16 => array:3 [
              "identificador" => "bib17"
              "etiqueta" => "17"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Continuous or nocturnal oxygen therapy in hypoxemic chronic obstructive lung disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Ann Intern Med"
                        "fecha" => "1980"
                        "volumen" => "93"
                        "paginaInicial" => "391"
                        "paginaFinal" => "398"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            17 => array:3 [
              "identificador" => "bib18"
              "etiqueta" => "18"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Prognostic value of nutritional depletion in patients with COPD treated by long-term oxygen therapy&#58; data from ANTADIR observatory"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Chest"
                        "fecha" => "2003"
                        "volumen" => "123"
                        "paginaInicial" => "1460"
                        "paginaFinal" => "1466"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            18 => array:3 [
              "identificador" => "bib19"
              "etiqueta" => "19"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Women and chronic obstructive pulmonary disease&#46; Does sex influence survival&#63;"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/rccm.200606-805ED"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Respir Crit Care Med"
                        "fecha" => "2006"
                        "volumen" => "174"
                        "paginaInicial" => "488"
                        "paginaFinal" => "489"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            19 => array:3 [
              "identificador" => "bib20"
              "etiqueta" => "20"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Anxiety and depression in COPD patients&#58; the roles of gender and disease severity"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.rmed.2006.01.026"
                      "Revista" => array:6 [
                        "tituloSerie" => "Respir Med"
                        "fecha" => "2006"
                        "volumen" => "100"
                        "paginaInicial" => "1767"
                        "paginaFinal" => "1774"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            20 => array:3 [
              "identificador" => "bib21"
              "etiqueta" => "21"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Prevalence of nutritional depletion in a large out-patient population of patients with COPD"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.rmed.2005.11.023"
                      "Revista" => array:6 [
                        "tituloSerie" => "Respir Med"
                        "fecha" => "2006"
                        "volumen" => "100"
                        "paginaInicial" => "1349"
                        "paginaFinal" => "1355"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            21 => array:3 [
              "identificador" => "bib22"
              "etiqueta" => "22"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Global strategy for the diagnosis&#44; management&#44; and prevention of chronic obstructive pulmonary disease&#58; NHLB&#47;WHO Global Initiative for Chronic Obstructive Lung Disease &#40;GOLD&#41; workshop summary"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/ajrccm.163.5.2101039"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Respir Crit Care Med"
                        "fecha" => "2001"
                        "volumen" => "163"
                        "paginaInicial" => "1256"
                        "paginaFinal" => "1276"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            22 => array:3 [
              "identificador" => "bib23"
              "etiqueta" => "23"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Effects of randomized assignment to a smoking cessation intervention and changes in smoking habits on respiratory symptoms in the Lung Health Study"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Med"
                        "fecha" => "1999"
                        "volumen" => "106"
                        "paginaInicial" => "410"
                        "paginaFinal" => "416"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            23 => array:3 [
              "identificador" => "bib24"
              "etiqueta" => "24"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Deshabituaci&#243;n tab&#225;quica en la EPOC"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Arch Bronconeumol"
                        "fecha" => "2005"
                        "volumen" => "41"
                        "paginaInicial" => "625"
                        "paginaFinal" => "633"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            24 => array:3 [
              "identificador" => "bib25"
              "etiqueta" => "25"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The effects of a smoking cessation intervention on 14&#46;5-year mortality&#58; a randomized clinical trial"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Ann Intern Med"
                        "fecha" => "2005"
                        "volumen" => "142"
                        "paginaInicial" => "233"
                        "paginaFinal" => "239"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            25 => array:3 [
              "identificador" => "bib26"
              "etiqueta" => "26"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Domestic biomass fuel combustion and chronic bronchitis in two rural Bolivian villages"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:5 [
                        "tituloSerie" => "Thorax"
                        "fecha" => "1999"
                        "volumen" => "54"
                        "paginaInicial" => "1404"
                        "paginaFinal" => "1408"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            26 => array:3 [
              "identificador" => "bib27"
              "etiqueta" => "27"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Survival of patients with chronic obstructive pulmonary disease due to biomass smoke and tobacco"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/rccm.200504-568OC"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Respir Crit Care Med"
                        "fecha" => "2006"
                        "volumen" => "173"
                        "paginaInicial" => "393"
                        "paginaFinal" => "397"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            27 => array:3 [
              "identificador" => "bib28"
              "etiqueta" => "28"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Standards for the diagnosis and treatment of patients with COPD&#58; a summary of the ATS&#47;ERS position paper"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Eur Respir J"
                        "fecha" => "2004"
                        "volumen" => "23"
                        "paginaInicial" => "932"
                        "paginaFinal" => "946"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            28 => array:3 [
              "identificador" => "bib29"
              "etiqueta" => "29"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Prediction of survival in patients with chronic airway obstruction"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/arrd.1969.99.6.865"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am Rev Respir Dis"
                        "fecha" => "1969"
                        "volumen" => "99"
                        "paginaInicial" => "865"
                        "paginaFinal" => "871"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            29 => array:3 [
              "identificador" => "bib30"
              "etiqueta" => "30"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Predictors of mortality in chronic obstructive pulmonary disease&#58; a 15-year follow-up study"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/arrd.1979.119.6.895"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am Rev Respir Dis"
                        "fecha" => "1979"
                        "volumen" => "119"
                        "paginaInicial" => "895"
                        "paginaFinal" => "902"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            30 => array:3 [
              "identificador" => "bib31"
              "etiqueta" => "31"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Prognosis in chronic obstructive pulmonary disease&#58; results from multicenter clinical trials"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/ajrccm/140.3_Pt_2.S95"
                      "Revista" => array:7 [
                        "tituloSerie" => "Am Rev Respir Dis"
                        "fecha" => "1989"
                        "volumen" => "140"
                        "paginaInicial" => "S95"
                        "paginaFinal" => "S99"
                        "link" => array:1 [ …1]
                        "itemHostRev" => array:3 [ …3]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            31 => array:3 [
              "identificador" => "bib32"
              "etiqueta" => "32"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Lung function and mortality in the United States&#58; data from the first National Health and Nutrition Examination Survey Follow Up study"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Thorax"
                        "fecha" => "2003"
                        "volumen" => "58"
                        "paginaInicial" => "388"
                        "paginaFinal" => "393"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            32 => array:3 [
              "identificador" => "bib33"
              "etiqueta" => "33"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:1 [
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Libro" => array:4 [
                        "titulo" => "The natural history of chronic bronchitis and emphysema"
                        "fecha" => "1976"
                        "editorial" => "Oxford University Press"
                        "editorialLocalizacion" => "New York&#44; Toronto"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            33 => array:3 [
              "identificador" => "bib34"
              "etiqueta" => "34"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Effects of smoking intervention and the use of an inhaled anticholinergic bronchodilator on the rate of decline of FEV<span class="elsevierStyleInf">1</span>&#46; The Lung Health Study"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "JAMA"
                        "fecha" => "1994"
                        "volumen" => "272"
                        "paginaInicial" => "1497"
                        "paginaFinal" => "1505"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            34 => array:3 [
              "identificador" => "bib35"
              "etiqueta" => "35"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The nature of small-airway obstruction in chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1056/NEJMoa032158"
                      "Revista" => array:6 [
                        "tituloSerie" => "N Engl J Med"
                        "fecha" => "2004"
                        "volumen" => "350"
                        "paginaInicial" => "2645"
                        "paginaFinal" => "2653"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            35 => array:3 [
              "identificador" => "bib36"
              "etiqueta" => "36"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Randomised&#44; double blind&#44; placebo controlled study of fluticasone propionate in patients with moderate to severe chronic obstructive pulmonary disease&#59; the ISOLDE trial"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "BMJ"
                        "fecha" => "2000"
                        "volumen" => "320"
                        "paginaInicial" => "1297"
                        "paginaFinal" => "1303"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            36 => array:3 [
              "identificador" => "bib37"
              "etiqueta" => "37"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Long-term treatment with inhaled budesonide in persons with mild chronic obstructive pulmonary disease who continue smoking&#46; European Respiratory Society Study on Chronic Obstructive Pulmonary Disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1056/NEJM199906243402503"
                      "Revista" => array:6 [
                        "tituloSerie" => "N Engl J Med"
                        "fecha" => "1999"
                        "volumen" => "340"
                        "paginaInicial" => "1948"
                        "paginaFinal" => "1953"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            37 => array:3 [
              "identificador" => "bib38"
              "etiqueta" => "38"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Long- term effect of budesonide in mild and moderate chronic obstructive pulmonary disease&#58; a randomised controlled trial"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Lancet"
                        "fecha" => "1999"
                        "volumen" => "353"
                        "paginaInicial" => "1819"
                        "paginaFinal" => "1823"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            38 => array:3 [
              "identificador" => "bib39"
              "etiqueta" => "39"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Effect of inhaled triamcinolone on the decline in pulmonary function in chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1056/NEJM200012283432601"
                      "Revista" => array:6 [
                        "tituloSerie" => "N Engl J Med"
                        "fecha" => "2000"
                        "volumen" => "343"
                        "paginaInicial" => "1902"
                        "paginaFinal" => "1909"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            39 => array:3 [
              "identificador" => "bib40"
              "etiqueta" => "40"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Inhaled corticosteroids reduce the progression of airflow limitations and chronic obstructive pulmonary disease&#58; a meta-analysis"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Thorax"
                        "fecha" => "2003"
                        "volumen" => "58"
                        "paginaInicial" => "937"
                        "paginaFinal" => "941"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            40 => array:3 [
              "identificador" => "bib41"
              "etiqueta" => "41"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Predictors of mortality in patients with emphysema and severe airflow obstruction"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/rccm.200510-1677OC"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Respir Crit Care Med"
                        "fecha" => "2006"
                        "volumen" => "173"
                        "paginaInicial" => "1326"
                        "paginaFinal" => "1334"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            41 => array:3 [
              "identificador" => "bib42"
              "etiqueta" => "42"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Prognostic value of nutritional status in chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/ajrccm.160.6.9902115"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Respir Crit Care Med"
                        "fecha" => "1999"
                        "volumen" => "160"
                        "paginaInicial" => "1856"
                        "paginaFinal" => "1861"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            42 => array:3 [
              "identificador" => "bib43"
              "etiqueta" => "43"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The 6-min walk distance&#58; change over time and value as a predictor of survival in severe COPD"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Eur Respir J"
                        "fecha" => "2004"
                        "volumen" => "23"
                        "paginaInicial" => "28"
                        "paginaFinal" => "33"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            43 => array:3 [
              "identificador" => "bib44"
              "etiqueta" => "44"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Inspiratory-to-total lung capacity ratio predicts mortality in patients with chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/rccm.200407-867OC"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Respir Crit Care Med"
                        "fecha" => "2005"
                        "volumen" => "171"
                        "paginaInicial" => "591"
                        "paginaFinal" => "597"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            44 => array:3 [
              "identificador" => "bib45"
              "etiqueta" => "45"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Health-related quality of life and mortality in male patients with chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/rccm.2112043"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Respir Crit Care Med"
                        "fecha" => "2002"
                        "volumen" => "166"
                        "paginaInicial" => "680"
                        "paginaFinal" => "685"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            45 => array:3 [
              "identificador" => "bib46"
              "etiqueta" => "46"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "C-reactive protein and mortality in mild to moderate chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1136/thx.2006.059808"
                      "Revista" => array:6 [
                        "tituloSerie" => "Thorax"
                        "fecha" => "2006"
                        "volumen" => "61"
                        "paginaInicial" => "849"
                        "paginaFinal" => "853"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            46 => array:3 [
              "identificador" => "bib47"
              "etiqueta" => "47"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The body-mass index&#44; airflow obstruction&#44; dyspnea&#44; and exercise capacity index in chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1056/NEJMoa021322"
                      "Revista" => array:6 [
                        "tituloSerie" => "N Engl J Med"
                        "fecha" => "2004"
                        "volumen" => "350"
                        "paginaInicial" => "1005"
                        "paginaFinal" => "1012"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            47 => array:3 [
              "identificador" => "bib48"
              "etiqueta" => "48"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Histamine airway hyper-responsiveness and mortality from chronic obstructive pulmonary disease&#58; a cohort study"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/S0140-6736(00)02815-4"
                      "Revista" => array:6 [
                        "tituloSerie" => "Lancet"
                        "fecha" => "2000"
                        "volumen" => "356"
                        "paginaInicial" => "1313"
                        "paginaFinal" => "1317"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            48 => array:3 [
              "identificador" => "bib49"
              "etiqueta" => "49"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Airway hyperresponsiveness and COPD mortality"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Thorax"
                        "fecha" => "2001"
                        "volumen" => "56"
                        "numero" => "Suppl 2"
                        "paginaInicial" => "11"
                        "paginaFinal" => "14"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            49 => array:3 [
              "identificador" => "bib50"
              "etiqueta" => "50"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Role of inspiratory capacity on exercise tolerance in COPD patients with and without expiratory flow limitations at rest"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Eur Respir J"
                        "fecha" => "2000"
                        "volumen" => "16"
                        "paginaInicial" => "269"
                        "paginaFinal" => "275"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            50 => array:3 [
              "identificador" => "bib51"
              "etiqueta" => "51"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Dynamic hyperinflation and exercise intolerance in chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/ajrccm.164.5.2012122"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Respir Crit Care Med"
                        "fecha" => "2001"
                        "volumen" => "164"
                        "paginaInicial" => "770"
                        "paginaFinal" => "777"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            51 => array:3 [
              "identificador" => "bib52"
              "etiqueta" => "52"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Weight loss is a reversible factor in the prognosis of chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/ajrccm.157.6.9705017"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Respir Crit Care Med"
                        "fecha" => "1998"
                        "volumen" => "157"
                        "paginaInicial" => "1791"
                        "paginaFinal" => "1797"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            52 => array:3 [
              "identificador" => "bib53"
              "etiqueta" => "53"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "National Emphysema Treatment Trial Research group&#46; A randomised trial comparing lung-volume-reduction surgery with medical therapy for severe emphysema"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1056/NEJMoa030287"
                      "Revista" => array:6 [
                        "tituloSerie" => "N Engl J Med"
                        "fecha" => "2003"
                        "volumen" => "348"
                        "paginaInicial" => "2059"
                        "paginaFinal" => "2073"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            53 => array:3 [
              "identificador" => "bib54"
              "etiqueta" => "54"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Effects of tiotropium on lung hyperinflation&#44; dyspnoea and exercise tolerance in COPD"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Eur Respir J"
                        "fecha" => "2004"
                        "volumen" => "23"
                        "paginaInicial" => "832"
                        "paginaFinal" => "840"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            54 => array:3 [
              "identificador" => "bib55"
              "etiqueta" => "55"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Effect of fluticasone propionate&#47;salmeterol on lung hyperinflation and exercise endurance in COPD"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1378/chest.130.3.647"
                      "Revista" => array:6 [
                        "tituloSerie" => "Chest"
                        "fecha" => "2006"
                        "volumen" => "130"
                        "paginaInicial" => "647"
                        "paginaFinal" => "656"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            55 => array:3 [
              "identificador" => "bib56"
              "etiqueta" => "56"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Clinical trial design considerations in assessing long-term functional impacts of tiotropium in COPD&#58; the Uplift trial"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "COPD"
                        "fecha" => "2004"
                        "volumen" => "1"
                        "paginaInicial" => "303"
                        "paginaFinal" => "312"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            56 => array:3 [
              "identificador" => "bib57"
              "etiqueta" => "57"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The nocturnal oxygen trial group&#46; Haemodynamic response to oxygen therapy in chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Ann Intern Med"
                        "fecha" => "1985"
                        "volumen" => "102"
                        "paginaInicial" => "29"
                        "paginaFinal" => "36"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            57 => array:3 [
              "identificador" => "bib58"
              "etiqueta" => "58"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Long-term oxygen therapy can reverse the progression of pulmonary hypertension in patients with chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/arrd.1985.131.4.493"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am Rev Respir Dis"
                        "fecha" => "1985"
                        "volumen" => "131"
                        "paginaInicial" => "493"
                        "paginaFinal" => "496"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            58 => array:3 [
              "identificador" => "bib59"
              "etiqueta" => "59"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Pulmonary haemodynamics after 6 years of oxygen therapy in COPD"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:4 [
                        "tituloSerie" => "Am J Respir Crit Care Med"
                        "fecha" => "1995"
                        "volumen" => "151"
                        "paginaInicial" => "A255"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            59 => array:3 [
              "identificador" => "bib60"
              "etiqueta" => "60"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Effect of long term oxygen therapy on survival in patients with chronic obstructive pulmonary disease with moderate hypoxaemia"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Thorax"
                        "fecha" => "1997"
                        "volumen" => "52"
                        "paginaInicial" => "674"
                        "paginaFinal" => "679"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            60 => array:3 [
              "identificador" => "bib61"
              "etiqueta" => "61"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Course and prognosis of chronic obstructive lung disease&#58; a prospective study of 200 patients"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1056/NEJM196902202800801"
                      "Revista" => array:6 [
                        "tituloSerie" => "N Engl J Med"
                        "fecha" => "1969"
                        "volumen" => "280"
                        "paginaInicial" => "397"
                        "paginaFinal" => "404"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            61 => array:3 [
              "identificador" => "bib62"
              "etiqueta" => "62"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Prognosis in severe chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/arrd.1979.119.3.357"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am Rev Respir Dis"
                        "fecha" => "1979"
                        "volumen" => "119"
                        "paginaInicial" => "357"
                        "paginaFinal" => "367"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            62 => array:3 [
              "identificador" => "bib63"
              "etiqueta" => "63"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Predictors of early mortality in patients with long-term oxygen home therapy"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Respiration"
                        "fecha" => "1985"
                        "volumen" => "48"
                        "paginaInicial" => "216"
                        "paginaFinal" => "221"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            63 => array:3 [
              "identificador" => "bib64"
              "etiqueta" => "64"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Twelve year clinical study of patients with hypoxic cor pulmonale given long-term domiciliary oxygen therapy"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Thorax"
                        "fecha" => "1987"
                        "volumen" => "42"
                        "paginaInicial" => "105"
                        "paginaFinal" => "110"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            64 => array:3 [
              "identificador" => "bib65"
              "etiqueta" => "65"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Regular physical activity reduces hospital admission and mortality in chronic obstructive pulmonary disease&#58; a population-based cohort study"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1136/thx.2006.060145"
                      "Revista" => array:6 [
                        "tituloSerie" => "Thorax"
                        "fecha" => "2006"
                        "volumen" => "61"
                        "paginaInicial" => "772"
                        "paginaFinal" => "778"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            65 => array:3 [
              "identificador" => "bib66"
              "etiqueta" => "66"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Predictors of survival in patients with chronic obstructive pulmonary disease treated with long-term oxygen therapy"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Chest"
                        "fecha" => "1991"
                        "volumen" => "100"
                        "paginaInicial" => "1522"
                        "paginaFinal" => "1527"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            66 => array:3 [
              "identificador" => "bib67"
              "etiqueta" => "67"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Prognosis in chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/arrd.1973.108.6.1373"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am Rev Respir Dis"
                        "fecha" => "1973"
                        "volumen" => "108"
                        "paginaInicial" => "1373"
                        "paginaFinal" => "1383"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            67 => array:3 [
              "identificador" => "bib68"
              "etiqueta" => "68"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Prognostic value of hypercapnia in patients with chronic respiratory failure during long-term oxygen therapy"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/ajrccm.158.1.9703092"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Respir Crit Care Med"
                        "fecha" => "1998"
                        "volumen" => "158"
                        "paginaInicial" => "188"
                        "paginaFinal" => "193"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            68 => array:3 [
              "identificador" => "bib69"
              "etiqueta" => "69"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Tolerance and survival in severe chronic hypercapnia"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Arch Intern Med"
                        "fecha" => "1972"
                        "volumen" => "129"
                        "paginaInicial" => "591"
                        "paginaFinal" => "596"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            69 => array:3 [
              "identificador" => "bib70"
              "etiqueta" => "70"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Patterns of cardiovascular dysfunction in chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1056/NEJM197204272861703"
                      "Revista" => array:6 [
                        "tituloSerie" => "N Engl J Med"
                        "fecha" => "1972"
                        "volumen" => "286"
                        "paginaInicial" => "912"
                        "paginaFinal" => "918"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            70 => array:3 [
              "identificador" => "bib71"
              "etiqueta" => "71"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Elevated pulmonary artery pressure"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Chest"
                        "fecha" => "1991"
                        "volumen" => "99"
                        "paginaInicial" => "112"
                        "paginaFinal" => "120"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            71 => array:3 [
              "identificador" => "bib72"
              "etiqueta" => "72"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Prognostic factors in COPD patients receiving long-term oxygen therapy&#46; Importance of pulmonary artery pressure"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Chest"
                        "fecha" => "1995"
                        "volumen" => "107"
                        "paginaInicial" => "1193"
                        "paginaFinal" => "1198"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            72 => array:3 [
              "identificador" => "bib73"
              "etiqueta" => "73"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Comparison of echocardiographic markers of right ventricular function in determining prognosis in chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "J Am Soc Echocardiogr"
                        "fecha" => "2002"
                        "volumen" => "15"
                        "paginaInicial" => "633"
                        "paginaFinal" => "639"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            73 => array:3 [
              "identificador" => "bib74"
              "etiqueta" => "74"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Electrocardiographic signs of chronic cor pulmonale&#58; a negative prognostic finding in chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:7 [
                        "tituloSerie" => "Circulation"
                        "fecha" => "1999"
                        "volumen" => "99"
                        "paginaInicial" => "1600"
                        "paginaFinal" => "1605"
                        "link" => array:1 [ …1]
                        "itemHostRev" => array:3 [ …3]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            74 => array:3 [
              "identificador" => "bib75"
              "etiqueta" => "75"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Mechanisms and measures of exercise intolerance in chronic obstructive pulmonary disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Clin Chest Med"
                        "fecha" => "2000"
                        "volumen" => "21"
                        "paginaInicial" => "693"
                        "paginaFinal" => "704"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            75 => array:3 [
              "identificador" => "bib76"
              "etiqueta" => "76"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Exercise capacity deterioration in patients with COPD&#46; Longitudinal evaluation over 5 years"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1378/chest.128.1.62"
                      "Revista" => array:6 [
                        "tituloSerie" => "Chest"
                        "fecha" => "2005"
                        "volumen" => "128"
                        "paginaInicial" => "62"
                        "paginaFinal" => "69"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            76 => array:3 [
              "identificador" => "bib77"
              "etiqueta" => "77"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Estado funcional y supervivencia de los pacientes con EPOC tras rehabilitaci&#243;n respiratoria"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Arch Bronconeumol"
                        "fecha" => "2006"
                        "volumen" => "42"
                        "paginaInicial" => "434"
                        "paginaFinal" => "439"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            77 => array:3 [
              "identificador" => "bib78"
              "etiqueta" => "78"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The relationship of the 6-min walk test to maximal oxygen consumption in transplant candidates with end-stage lung disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Chest"
                        "fecha" => "1995"
                        "volumen" => "108"
                        "paginaInicial" => "452"
                        "paginaFinal" => "459"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            78 => array:3 [
              "identificador" => "bib79"
              "etiqueta" => "79"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The six-minute walk distance&#58; long-term follow up in patients with COPD"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1183/09031936.00071506"
                      "Revista" => array:6 [
                        "tituloSerie" => "Eur Respir J"
                        "fecha" => "2007"
                        "volumen" => "29"
                        "paginaInicial" => "535"
                        "paginaFinal" => "540"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            79 => array:3 [
              "identificador" => "bib80"
              "etiqueta" => "80"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The relevance in adults of airflow obstruction&#44; but not of mucus hypersecretion&#44; to mortality from chronic lung disease"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Am Rev Respir Dis"
                        "fecha" => "1983"
                        "volumen" => "128"
                        "paginaInicial" => "491"
                        "paginaFinal" => "500"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            80 => array:3 [
              "identificador" => "bib81"
              "etiqueta" => "81"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Respiratory symptoms and pulmonary function as predictors of 10-year mortality from respiratory disease&#44; cardiovascular disease&#44; and all cause in the Whitehall study"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "J Clin Epidemiol"
                        "fecha" => "1988"
                        "volumen" => "41"
                        "paginaInicial" => "251"
                        "paginaFinal" => "260"
                        "link" => array:1 [ …1]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            81 => array:3 [
              "identificador" => "bib82"
              "etiqueta" => "82"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Relevance of airflow obstruction and mucus hypersecretion to mortality"
                      "autores" => array:1 [
                        0 => array:2 [ …2]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Respir Med"
                         …5
                      ]
                    ]
                  ]
                ]
              ]
            ]
            82 => array:3 [
              "identificador" => "bib83"
              "etiqueta" => "83"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Respiratory symptoms&#44; lung function&#44; and mortality in a screening center cohort"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            83 => array:3 [
              "identificador" => "bib84"
              "etiqueta" => "84"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The relation of ventilatory impairment and of chronic mucus hypersecretion to mortality from obstructive lung disease and from all causes"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            84 => array:3 [
              "identificador" => "bib85"
              "etiqueta" => "85"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Determinants of prognosis of COPD in the elderly&#58; mucus hypersecretion&#44; infections&#44; cardiovascular comorbidity"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            85 => array:3 [
              "identificador" => "bib86"
              "etiqueta" => "86"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Association of chronic mucus hypersecretion with FEV<span class="elsevierStyleInf">1</span> decline and COPD morbidity"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/ajrccm.153.5.8630597"
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            86 => array:3 [
              "identificador" => "bib87"
              "etiqueta" => "87"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Chronic mucus hypersecretion in COPD and death from pulmonary infection"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            87 => array:3 [
              "identificador" => "bib88"
              "etiqueta" => "88"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Dyspnea&#58; mechanisms&#44; assessment&#44; and management&#59; a consensus statement"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/ajrccm.159.1.ats898"
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            88 => array:3 [
              "identificador" => "bib89"
              "etiqueta" => "89"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Functional status and well being in chronic obstructive pulmonary disease with regard to clinical parameters and smoking&#58; a descriptive and comparative study"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            89 => array:3 [
              "identificador" => "bib90"
              "etiqueta" => "90"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Chronic obstructive pulmonary disease stage and health-related quality of life&#58; the quality of life of chronic obstructive pulmonary disease study group"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:7 [ …7]
                    ]
                  ]
                ]
              ]
            ]
            90 => array:3 [
              "identificador" => "bib91"
              "etiqueta" => "91"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Validity of subjective assessment of changes in respiratory health status&#58; a 30 year epidemiological study of workers in Paris"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            91 => array:3 [
              "identificador" => "bib92"
              "etiqueta" => "92"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Effect of exacerbation on quality of life in patients with chronic obstructive pulmonary disease"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/ajrccm.157.5.9709032"
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            92 => array:3 [
              "identificador" => "bib93"
              "etiqueta" => "93"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Risk factors of emergency care and admissions in COPD patients with high consumption of health resources"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:5 [ …5]
                    ]
                  ]
                ]
              ]
            ]
            93 => array:3 [
              "identificador" => "bib94"
              "etiqueta" => "94"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Mortality in COPD patients discharged from hospital&#58; the role of treatment and co-morbidity"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1186/1465-9921-7-109"
                      "Revista" => array:5 [ …5]
                    ]
                  ]
                ]
              ]
            ]
            94 => array:3 [
              "identificador" => "bib95"
              "etiqueta" => "95"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Variables related to increased mortality following out-patient pulmonary rehabilitation"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            95 => array:3 [
              "identificador" => "bib96"
              "etiqueta" => "96"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "A simple score for assessing stable chronic obstructive pulmonary disease"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1093/qjmed/hcl110"
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            96 => array:3 [
              "identificador" => "bib97"
              "etiqueta" => "97"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "El papel de las exacerbaciones en la historia natural de la EPOC"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            97 => array:3 [
              "identificador" => "bib98"
              "etiqueta" => "98"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Factors affecting survival of hospitalised patients with COPD"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1183/09031936.05.00024804"
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            98 => array:3 [
              "identificador" => "bib99"
              "etiqueta" => "99"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Non-invasive positive pressure ventilation to treat respiratory failure resulting from exacerbations of chronic obstructive pulmonary disease&#58; Cochrane systematic review and meta-analysis"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:7 [ …7]
                    ]
                  ]
                ]
              ]
            ]
            99 => array:3 [
              "identificador" => "bib100"
              "etiqueta" => "100"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Non-invasive ventilation in acute exacerbations of chronic obstructive pulmonary disease&#58; long term survival and predictors of in-hospital outcome"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            100 => array:3 [
              "identificador" => "bib101"
              "etiqueta" => "101"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The effects of inhaled corticosteroids in chronic obstructive pulmonary disease&#58; a systematic review of randomised placebo-controlled trials"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            101 => array:3 [
              "identificador" => "bib102"
              "etiqueta" => "102"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Inhaled corticosteroids and mortality in chronic obstructive pulmonary disease"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1136/thx.2005.045385"
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            102 => array:3 [
              "identificador" => "bib103"
              "etiqueta" => "103"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Salmeterol and fluticasone propionate and survival in chronic obstructive pulmonary disease"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1056/NEJMoa063070"
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            103 => array:3 [
              "identificador" => "bib104"
              "etiqueta" => "104"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Combined salmeterol and fluticasone in the treatment of chronic obstructive pulmonary disease&#58; a randomised controlled trial"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/S0140-6736(03)12459-2"
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            104 => array:3 [
              "identificador" => "bib105"
              "etiqueta" => "105"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Efficacy and safety of budesonide&#47;formoterol and formoterol in chronic obstructive pulmonary diseases"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            105 => array:3 [
              "identificador" => "bib106"
              "etiqueta" => "106"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Prevention of exacerbations of chronic obstructive pulmonary disease with tiotropium&#44; a once-daily inhaled anticholinergic bronchodilator&#58; a randomized trial"
                      "autores" => array:1 [ …1]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [ …6]
                    ]
                  ]
                ]
              ]
            ]
            106 => array:3 [
              "identificador" => "bib107"
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                    0 => array:1 [
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                    0 => array:2 [
                      "titulo" => "Nutritional status and mortality in chronic obstructive pulmonary disease"
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                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1164/ajrccm.153.3.8630580"
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                      "titulo" => "Body weight and comorbidity predict mortality in COPD patients treated with oxygen therapy"
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                      "titulo" => "Prognostic value of weight change in chronic obstructive pulmonary disease&#58; results from the Copenhagen City Heart Study"
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                      "titulo" => "Nutritional depletion in relation to respiratory and peripheral skeletal muscle function in an outpatient population with chronic obstructive pulmonary disease"
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                  "host" => array:1 [
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                0 => array:2 [
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                      "titulo" => "Ascertainment of cause-specific mortality in COPD&#58; operations of the TORCH clinical endpoint committee"
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                    0 => array:1 [
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                    0 => array:2 [
                      "titulo" => "Pulmonary function is a long-term predictor of mortality in the general population&#58; 29-year follow-up of the Buffalo Health Study"
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                    0 => array:2 [
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                0 => array:2 [
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                    0 => array:2 [
                      "titulo" => "Effects of fluticasone on systemic markers of inflammation in chronic obstructive pulmonary disease"
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                    0 => array:2 [
                      "doi" => "10.1164/rccm.200404-543OC"
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                      "titulo" => "Low-dose inhaled corticosteroids and the risk of acute myocardial infarction in COPD"
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                    0 => array:2 [
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                0 => array:2 [
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                    0 => array:2 [
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                      "titulo" => "Prognostic value of the hematocrit in patients with severe COPD receiving long-term oxygen therapy"
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                    0 => array:2 [
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                0 => array:2 [
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                      "titulo" => "Raised CRP levels mark metabolic and functional impairment in advanced COPD"
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                    0 => array:2 [
                      "doi" => "10.1136/thx.2005.041996"
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              ]
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                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:7 [ …7]
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                      "titulo" => "Pulmonary rehabilitation and the BODE index in COPD"
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                    0 => array:2 [
                      "doi" => "10.1183/09031936.05.00045505"
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                      "titulo" => "The BODE index after lung volume reduction surgery correlates with survival"
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                    0 => array:2 [
                      "doi" => "10.1378/chest.129.4.873"
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Journal Information
Vol. 43. Issue 12.
Pages 680-691 (January 2007)
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Vol. 43. Issue 12.
Pages 680-691 (January 2007)
REVIEW ARTICLE
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Prognostic Factors in Chronic Obstructive Pulmonary Disease
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Juan José Soler Cataluña
Corresponding author
jjsoler@telefonica.net

Correspondence: Dr. J.J. Soler Cataluña. Unidad de Neumología. Servicio de Medicina Interna. Hospital General de Requena. Paraje Casablanca, s/n.46340 Requena. Valencia. España
, Miguel Ángel Martínez García
Unidad de Neumología, Servicio de Medicina Interna, Hospital General de Requena, Requena, Valencia, Spain
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Efforts over the last few decades to extend the life expectancy of patients with chronic obstructive pulmonary disease (COPD) have faced difficulties, but our perception of the problems involved is now starting to change. Improvements in our understanding of the pathogenic and etiological mechanisms of the disease, analysis of the causes of death, and, in particular, identification of the relevant prognostic factors have resulted in firm advances that allow us to face the future with greater optimism. The aim of this review is to provide a detailed analysis of the chief prognostic factors described in the literature and to evaluate the therapeutic implications of these findings. The traditional view maintained that the accelerated decline over time in forced expiratory volume in 1 second was one of the best predictors of mortality, and this belief has for decades determined the strategies used to treat COPD. However, we now know COPD to be a multidimensional disease and are aware that some of its other manifestations have important prognostic implications. Lung hyperinflation, exercise tolerance, exacerbations, comorbidity, and systemic manifestations–in particular those related to the cardiovascular system–have all been shown in recent years to be strong predictors of mortality. The inflammatory substrate, whether local or systemic, merits special consideration because it appears to be the cause of many of these manifestations. These newly identified prognostic factors are of great interest in that it may be possible to moderate their influence, a circumstance that highlights the need to change the traditional treatment approach and devise therapeutic interventions oriented towards reversing the effects of these factors.

Key words:
COPD
Prognostic factors
Predictors of mortality

Prolongar la supervivencia de los pacientes con enfermedad pulmonar obstructiva crónica (EPOC) es, y ha sido durante décadas, un objetivo complicado. Sin embargo, poco a poco esta percepción empieza a cambiar. De la mano de un mejor conocimiento etiopatogénico de la enfermedad, del análisis de las causas de muerte y sobre todo de la identificación de diversos factores pronósticos, se van dando pasos firmes que permiten afrontar el futuro con mayor optimismo. La presente revisión pretende analizar de forma pormenorizada los principales determinantes pronósticos que se han descrito en la literatura médica y valorar sus posibles implicaciones terapéuticas. Tradicionalmente se ha aceptado que el volumen espiratorio forzado en el primer segundo y su descenso acelerado a lo largo del tiempo era uno de los mejores predictores de mortalidad. Este hecho condicionó durante décadas el objetivo terapéutico en la EPOC. Sin embargo, hoy sabemos que la EPOC es una enfermedad con múltiples dimensiones, algunas de las cuales tienen importantes consecuencias pronósticas. La hiperinsuflación pulmonar, la tolerancia al esfuerzo, las exacerbaciones, la comorbilidad y las manifestaciones sistémicas, especialmente las resultantes de la esfera cardiovascular, son dimensiones que en los últimos años se han revelado como potentes predictores de muerte. El sustrato inflamatorio, tanto local como sistémico, parece estar detrás de muchas de estas manifestaciones y por ello merece especial consideración. Estos nuevos factores pronósticos tienen la virtud de ser potencialmente modificables, lo que subraya la necesidad de planificar intervenciones terapéuticas orientadas a revertir sus efectos cambiando de alguna forma la estrategia tradicional.

Palabras clave:
EPOC
Factores pronósticos
Predictores de mortalidad
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REFERENCES
[1]
NR Anthonisen, EC Wright, JE Hodgkin.
Prognosis in chronic obstructive pulmonary disease.
Am Rev Respir Dis, 133 (1986), pp. 14-20
[2]
T Oga, K Nishimura, M Tsukino, S Sato, T Hajiro.
Analysis of the factors related to mortality in chronic obstructive pulmonary disease. Role of exercise capacity and health status.
Am J Respir Crit Care Med, 167 (2003), pp. 544-549
[3]
JJ Soler-Cataluña, MA Martínez-García, P Sánche Románz, et al.
Severe acute exacerbations and mortality in patients with chronic obstructive pulmonary disease.
Thorax, 60 (2005), pp. 925-931
[4]
K Nishimura, T Izumi, M Tsukino, T Oga, on behalf of the Kansai COPD Registry and Research Group in Japan.
Dyspnea is a better predictor of 5-year survival than airway obstruction in patients with COPD.
Chest, 121 (2002), pp. 1434-1440
[5]
AF Connors, NV Dawson, C Thomas, FE Harrell, N Desbiens, WJ Fulkerson, et al.
Outcomes following acute exacerbation of severe chronic obstructive lung disease.
Am J Respir Crit Care Med, 154 (1996), pp. 959-967
[6]
KH Groenewegen, AMWJ Schols, E Wouters.
Mortality and mortality-related factors after hospitalization for acute exacerbation of COPD.
Chest, 124 (2003), pp. 459-467
[7]
RA Antonelli-Incalzi, L Fuso, M De Rosa, E Rapiti, B Nardecchia, R Pistelli.
Co-morbidity contributes to predict mortality of patients with chronic obstructive pulmonary disease.
Eur Respir J, 10 (1997), pp. 2794-2800
[8]
AM Yohannes, MJ Connolly.
Effect of dichotomising age in multivariate model analysis.
Thorax, 61 (2006), pp. 548
[9]
P Almagro, E Calbo, A Ochoa de Echagüen, B Barreiro, S Quintana, JL Heredia, et al.
Mortality after hospitalization for COPD.
Chest, 121 (2002), pp. 1441-1448
[10]
RM Davis, TE Novotny.
Changes in risk factors: the epidemiology of cigarette smoking on chronic obstructive pulmonary disease.
Am Rev Respir Dis, 140 (1989), pp. S82-S84
[11]
Y Chen, SL Horne, JA Dosman.
Increased susceptibility to lung dysfunction in female smokers.
Am Rev Respir Dis, 143 (1991), pp. 1224-1230
[12]
E Prescott, AM Bjerg, PK Andersen, P Lange, J Vestbo.
Gender difference in smoking effects on lung function and risk of hospitalization for COPD: results from a Danish longitudinal population study.
Eur J Respir J, 10 (1997), pp. 822-827
[13]
MC Machado, JA Krishnan, SA Buist, AL Bilderback, GP Fazolo, MG Santarosa, et al.
Sex differences in survival of oxygen-dependent patients with chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 174 (2006), pp. 524-529
[14]
DM Mannino, DE Doherty, BA Sonia.
Global Initiative on Obstructive Lung Disease (GOLD) classification of lung disease and mortality: findings from the Atherosclerosis Risk in Communities (ARIC) study.
Respir Med, 100 (2006), pp. 115-122
[15]
K Strom.
Survival of patients with chronic obstructive pulmonary disease receiving long-term domiciliary oxygen therapy.
Am Rev Respir Dis, 147 (1993), pp. 585-591
[16]
Medical Research Council Working Party.
Report of long-term oxygen therapy in chronic hypoxic cor pulmonale complicating chronic bronchitis and emphysema.
Lancet, 36 (1981), pp. 752-758
[17]
Nocturnal Oxygen Therapy Trial Group.
Continuous or nocturnal oxygen therapy in hypoxemic chronic obstructive lung disease.
Ann Intern Med, 93 (1980), pp. 391-398
[18]
E Chailleux, J-P Laaban, D Veale.
Prognostic value of nutritional depletion in patients with COPD treated by long-term oxygen therapy: data from ANTADIR observatory.
Chest, 123 (2003), pp. 1460-1466
[19]
D Mannino.
Women and chronic obstructive pulmonary disease. Does sex influence survival?.
Am J Respir Crit Care Med, 174 (2006), pp. 488-489
[20]
F di Marco, M Verga, M Reggente, CF Maria, P Santus, F Blasi, et al.
Anxiety and depression in COPD patients: the roles of gender and disease severity.
Respir Med, 100 (2006), pp. 1767-1774
[21]
MA Vermeeren, EC Creutzberg, AM Schols, DS Postma, WR Pieters, et al.
Prevalence of nutritional depletion in a large out-patient population of patients with COPD.
Respir Med, 100 (2006), pp. 1349-1355
[22]
RA Pauwels, AS Buist, PM Calverley, CR Jenkings, SS Hurd.
Global strategy for the diagnosis, management, and prevention of chronic obstructive pulmonary disease: NHLB/WHO Global Initiative for Chronic Obstructive Lung Disease (GOLD) workshop summary.
Am J Respir Crit Care Med, 163 (2001), pp. 1256-1276
[23]
RE Kanner, JE Connett, DE Williams, AS Buist, for the Lung Health Study Research Group.
Effects of randomized assignment to a smoking cessation intervention and changes in smoking habits on respiratory symptoms in the Lung Health Study.
Am J Med, 106 (1999), pp. 410-416
[24]
JI Granda-Orive, JM Martínez-Albiach.
Deshabituación tabáquica en la EPOC.
Arch Bronconeumol, 41 (2005), pp. 625-633
[25]
NR Anthonisen, MA Skeans, RA Wise, J Manfreda, RE Kanner, JE Connett, et al.
The effects of a smoking cessation intervention on 14.5-year mortality: a randomized clinical trial.
Ann Intern Med, 142 (2005), pp. 233-239
[26]
R Albalak, AR Frisancho, GJ Keeler.
Domestic biomass fuel combustion and chronic bronchitis in two rural Bolivian villages.
Thorax, 54 (1999), pp. 1404-1408
[27]
A Ramírez-Venegas, RH Sansores, R Pérez-Padilla, J Regalado, A Velázquez, C Sánchez, et al.
Survival of patients with chronic obstructive pulmonary disease due to biomass smoke and tobacco.
Am J Respir Crit Care Med, 173 (2006), pp. 393-397
[28]
BR Celli, W MacNee.
Standards for the diagnosis and treatment of patients with COPD: a summary of the ATS/ERS position paper.
Eur Respir J, 23 (2004), pp. 932-946
[29]
B Burrows, RH Earle.
Prediction of survival in patients with chronic airway obstruction.
Am Rev Respir Dis, 99 (1969), pp. 865-871
[30]
GA Traver, MG Cline, B Burrows.
Predictors of mortality in chronic obstructive pulmonary disease: a 15-year follow-up study.
Am Rev Respir Dis, 119 (1979), pp. 895-902
[31]
NR Anthonisen.
Prognosis in chronic obstructive pulmonary disease: results from multicenter clinical trials.
Am Rev Respir Dis, 140 (1989), pp. S95-S99
[32]
DM Mannino, AS Buist, TL Petty, PL Enright, SC Redd.
Lung function and mortality in the United States: data from the first National Health and Nutrition Examination Survey Follow Up study.
Thorax, 58 (2003), pp. 388-393
[33]
CM Fletcher, R Peto, C Tinker, FE Speizer.
The natural history of chronic bronchitis and emphysema, Oxford University Press, (1976),
[34]
NR Anthonisen, JE Connett, JP Kiley, MD Altose, WC Bailey, AS Buist, et al.
Effects of smoking intervention and the use of an inhaled anticholinergic bronchodilator on the rate of decline of FEV1. The Lung Health Study.
JAMA, 272 (1994), pp. 1497-1505
[35]
JC Hogg, F Chu, S Utokaparch, R Woods, WM Elliot, L Buzatu, et al.
The nature of small-airway obstruction in chronic obstructive pulmonary disease.
N Engl J Med, 350 (2004), pp. 2645-2653
[36]
PS Burge, PMA Calverley, PW Jones, S Spencer, JA Anderson, TK Maslen, on behalf of the ISOLDE study investigators, et al.
Randomised, double blind, placebo controlled study of fluticasone propionate in patients with moderate to severe chronic obstructive pulmonary disease; the ISOLDE trial.
BMJ, 320 (2000), pp. 1297-1303
[37]
RA Pauwels, CG Lofdahl, LA Laitinen, JP Schouten, DS Postma, NB Pride, et al.
Long-term treatment with inhaled budesonide in persons with mild chronic obstructive pulmonary disease who continue smoking. European Respiratory Society Study on Chronic Obstructive Pulmonary Disease.
N Engl J Med, 340 (1999), pp. 1948-1953
[38]
J Vestbo, T Sorensen, P Lange, A Brix, P Torre, K Viskum.
Long- term effect of budesonide in mild and moderate chronic obstructive pulmonary disease: a randomised controlled trial.
Lancet, 353 (1999), pp. 1819-1823
[39]
The Lung Health Study Research Group.
Effect of inhaled triamcinolone on the decline in pulmonary function in chronic obstructive pulmonary disease.
N Engl J Med, 343 (2000), pp. 1902-1909
[40]
ER Sutherland, H Allmers, NT Ayas, AJ Venn, RJ Martin.
Inhaled corticosteroids reduce the progression of airflow limitations and chronic obstructive pulmonary disease: a meta-analysis.
Thorax, 58 (2003), pp. 937-941
[41]
FJ Martínez, G Foster, JL Curtis, G Criner, G Weinmann, A Fishman, et al.
Predictors of mortality in patients with emphysema and severe airflow obstruction.
Am J Respir Crit Care Med, 173 (2006), pp. 1326-1334
[42]
C Landbo, E Prescott, P Lange, J Vestbo, T Almidal.
Prognostic value of nutritional status in chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 160 (1999), pp. 1856-1861
[43]
VM Pinto-Plata, C Cote, H Cabral, J Taylor, BR Celli.
The 6-min walk distance: change over time and value as a predictor of survival in severe COPD.
Eur Respir J, 23 (2004), pp. 28-33
[44]
C Casanova, C Cote, JP de Torres, A Aguirre-Jaime, JM Marín, V Pinto-Plata, et al.
Inspiratory-to-total lung capacity ratio predicts mortality in patients with chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 171 (2005), pp. 591-597
[45]
A Domingo-Salvany, R Lamarca, M Ferrer, J García-Aymerich, J Alonso, M Félez.
Health-related quality of life and mortality in male patients with chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 166 (2002), pp. 680-685
[46]
P Man, JE Connett, NR Anthonisen, RA Wise, DP Tashkin, DD Sin.
C-reactive protein and mortality in mild to moderate chronic obstructive pulmonary disease.
Thorax, 61 (2006), pp. 849-853
[47]
BR Celli, CG Cote, JM Marín, C Casanova, M Montes de Oca, RA Méndez, et al.
The body-mass index, airflow obstruction, dyspnea, and exercise capacity index in chronic obstructive pulmonary disease.
N Engl J Med, 350 (2004), pp. 1005-1012
[48]
JJ Hospers, DS Postma, B Rijcken, ST Weiss, JP Schouten.
Histamine airway hyper-responsiveness and mortality from chronic obstructive pulmonary disease: a cohort study.
Lancet, 356 (2000), pp. 1313-1317
[49]
J Vestbo, EF Hansen.
Airway hyperresponsiveness and COPD mortality.
Thorax, 56 (2001), pp. 11-14
[50]
O Díaz, C Villafranca, H Ghezzo, G Borzone, A Leiva, J Milic-Emili, et al.
Role of inspiratory capacity on exercise tolerance in COPD patients with and without expiratory flow limitations at rest.
Eur Respir J, 16 (2000), pp. 269-275
[51]
DE O'Donnell, SM Revill, KA Webb.
Dynamic hyperinflation and exercise intolerance in chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 164 (2001), pp. 770-777
[52]
AMWJ Schols, J Slangen, L Volovics, et al.
Weight loss is a reversible factor in the prognosis of chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 157 (1998), pp. 1791-1797
[53]
A Fishman, F Martínez, K Naunheim, S Piantadosi, R Wise, A Ries, et al.
National Emphysema Treatment Trial Research group. A randomised trial comparing lung-volume-reduction surgery with medical therapy for severe emphysema.
N Engl J Med, 348 (2003), pp. 2059-2073
[54]
O'Donnell, T Flüge, F Gerken, A Hamilton, K Webb, B Aguilaniu, et al.
Effects of tiotropium on lung hyperinflation, dyspnoea and exercise tolerance in COPD.
Eur Respir J, 23 (2004), pp. 832-840
[55]
D O'Donnell, F Sciurba, BR Celli, DA Mahler, K Webb, CJ Kalberg, et al.
Effect of fluticasone propionate/salmeterol on lung hyperinflation and exercise endurance in COPD.
Chest, 130 (2006), pp. 647-656
[56]
M Decramer, B Celli, DP Tashkin, RA Pauwells, D Burkhart, C Cassino, et al.
Clinical trial design considerations in assessing long-term functional impacts of tiotropium in COPD: the Uplift trial.
COPD, 1 (2004), pp. 303-312
[57]
RM Timms, FU Khaja, GW Williams.
The nocturnal oxygen trial group. Haemodynamic response to oxygen therapy in chronic obstructive pulmonary disease.
Ann Intern Med, 102 (1985), pp. 29-36
[58]
E Weitzenblum, A Sautegeau, M Ehrhart, M Mammossesr, A Pelletier.
Long-term oxygen therapy can reverse the progression of pulmonary hypertension in patients with chronic obstructive pulmonary disease.
Am Rev Respir Dis, 131 (1985), pp. 493-496
[59]
M Tobiasz, P Sliwiñsk, I Hawrytiewicz, G Patasiewicz, J Zieliñski.
Pulmonary haemodynamics after 6 years of oxygen therapy in COPD.
Am J Respir Crit Care Med, 151 (1995), pp. A255
[60]
D Górecka, K Gorzelak, P Sliwinski, M Tobiasz, J Zielinski.
Effect of long term oxygen therapy on survival in patients with chronic obstructive pulmonary disease with moderate hypoxaemia.
Thorax, 52 (1997), pp. 674-679
[61]
B Burrows, RH Earle.
Course and prognosis of chronic obstructive lung disease: a prospective study of 200 patients.
N Engl J Med, 280 (1969), pp. 397-404
[62]
DS Postma, J Burema, F Gimeno, JF May, JM Smit, EJ Steenhuis, et al.
Prognosis in severe chronic obstructive pulmonary disease.
Am Rev Respir Dis, 119 (1979), pp. 357-367
[63]
R Keller, A Ragaz, P Borer.
Predictors of early mortality in patients with long-term oxygen home therapy.
Respiration, 48 (1985), pp. 216-221
[64]
CB Cooper, J Waterhouse, P Howard.
Twelve year clinical study of patients with hypoxic cor pulmonale given long-term domiciliary oxygen therapy.
Thorax, 42 (1987), pp. 105-110
[65]
J García-Aymerich, P Lange, M Benet, P Schnohr, JM Antó.
Regular physical activity reduces hospital admission and mortality in chronic obstructive pulmonary disease: a population-based cohort study.
Thorax, 61 (2006), pp. 772-778
[66]
K Skwarki, W MacNee, PK Wraith, P Sliwinski, J Zielinski.
Predictors of survival in patients with chronic obstructive pulmonary disease treated with long-term oxygen therapy.
Chest, 100 (1991), pp. 1522-1527
[67]
SF Boushy, HK Thompson, LB North, AR Beale, TR Snow.
Prognosis in chronic obstructive pulmonary disease.
Am Rev Respir Dis, 108 (1973), pp. 1373-1383
[68]
A Aida, K Miyamoto, M Nishimura, M Aiba, S Kira, K Kawakami, et al.
Prognostic value of hypercapnia in patients with chronic respiratory failure during long-term oxygen therapy.
Am J Respir Crit Care Med, 158 (1998), pp. 188-193
[69]
T Neff, TL Petty.
Tolerance and survival in severe chronic hypercapnia.
Arch Intern Med, 129 (1972), pp. 591-596
[70]
B Burrows, LJ Kettel, AH Niden, M Rabinowitz, CF Diener.
Patterns of cardiovascular dysfunction in chronic obstructive pulmonary disease.
N Engl J Med, 286 (1972), pp. 912-918
[71]
R Cooper, J Ghali, BE Simmons, A Castaner.
Elevated pulmonary artery pressure.
Chest, 99 (1991), pp. 112-120
[72]
M Oswald-Mammosser, E Weitzenblum, E Quoix, G Moser, A Chaouat, Cl Charpentier.
Prognostic factors in COPD patients receiving long-term oxygen therapy. Importance of pulmonary artery pressure.
Chest, 107 (1995), pp. 1193-1198
[73]
MI Burgess, N Mogulkoc, RJ Bright-Thomas, P Bishop, JJ Egan, SG Ray.
Comparison of echocardiographic markers of right ventricular function in determining prognosis in chronic obstructive pulmonary disease.
J Am Soc Echocardiogr, 15 (2002), pp. 633-639
[74]
RA Incalzi, L Fuso, M De Rosa, A di Napoli, S Basso, G Pagliari, et al.
Electrocardiographic signs of chronic cor pulmonale: a negative prognostic finding in chronic obstructive pulmonary disease.
Circulation, 99 (1999), pp. 1600-1605
[75]
L Nici.
Mechanisms and measures of exercise intolerance in chronic obstructive pulmonary disease.
Clin Chest Med, 21 (2000), pp. 693-704
[76]
T Oga, K Nishimura, M Tsukino, S Sato, T Hajiro, M Mishima.
Exercise capacity deterioration in patients with COPD. Longitudinal evaluation over 5 years.
Chest, 128 (2005), pp. 62-69
[77]
MV López Varela, T Anido, M Larrosa.
Estado funcional y supervivencia de los pacientes con EPOC tras rehabilitación respiratoria.
Arch Bronconeumol, 42 (2006), pp. 434-439
[78]
L Cahalin, P Pappagianopoulos, S Prevost, J Wain, L Ginns.
The relationship of the 6-min walk test to maximal oxygen consumption in transplant candidates with end-stage lung disease.
Chest, 108 (1995), pp. 452-459
[79]
C Casanova, CG Cote, JM Marín, JP de Torres, A Aguirre-Jaime, R Méndez, et al.
The six-minute walk distance: long-term follow up in patients with COPD.
Eur Respir J, 29 (2007), pp. 535-540
[80]
R Peto, FE Speizer, AL Cochrane.
The relevance in adults of airflow obstruction, but not of mucus hypersecretion, to mortality from chronic lung disease.
Am Rev Respir Dis, 128 (1983), pp. 491-500
[81]
KL Ebi-Kryston.
Respiratory symptoms and pulmonary function as predictors of 10-year mortality from respiratory disease, cardiovascular disease, and all cause in the Whitehall study.
J Clin Epidemiol, 41 (1988), pp. 251-260
[82]
FJ Wiles, E Hnizdo.
Relevance of airflow obstruction and mucus hypersecretion to mortality.
Respir Med, 85 (1991), pp. 27-35
[83]
WM Vollmer, LE McCamant, LR Johnson, AS Buist.
Respiratory symptoms, lung function, and mortality in a screening center cohort.
Am J Epidemiol, 129 (1989), pp. 1157-1169
[84]
P Lange, J Nyboe, M Appleyard, G Jensen, P Schnohr.
The relation of ventilatory impairment and of chronic mucus hypersecretion to mortality from obstructive lung disease and from all causes.
Thorax, 45 (1990), pp. 579-585
[85]
R Pistelli, P Lange, DL Miller.
Determinants of prognosis of COPD in the elderly: mucus hypersecretion, infections, cardiovascular comorbidity.
Eur Respir J, 21 (2003), pp. 10-14
[86]
J Vestbo, E Prescott, P Lange, the Copenhagen City Heart Study Group.
Association of chronic mucus hypersecretion with FEV1 decline and COPD morbidity.
Am J Respir Crit Care Med, 153 (1996), pp. 1530-1535
[87]
E Prescott, P Lange, J Vestbo.
Chronic mucus hypersecretion in COPD and death from pulmonary infection.
Eur Respir J, 8 (1995), pp. 1333-1338
[88]
American Thoracic Society.
Dyspnea: mechanisms, assessment, and management; a consensus statement.
Am J Respir Crit Care Med, 159 (1999), pp. 321-340
[89]
CP Engström, LO Persson, S Larson, A Ryden, M Sullivan.
Functional status and well being in chronic obstructive pulmonary disease with regard to clinical parameters and smoking: a descriptive and comparative study.
Thorax, 51 (1996), pp. 825-830
[90]
M Ferrer, J Alonso, J Morera, R Marrades, A Khalaf, MC Aguar, et al.
Chronic obstructive pulmonary disease stage and health-related quality of life: the quality of life of chronic obstructive pulmonary disease study group.
Ann Intern Med, 127 (1997), pp. 1072-1079
[91]
F Kauffmann, I Annesi, J Chwalow.
Validity of subjective assessment of changes in respiratory health status: a 30 year epidemiological study of workers in Paris.
Eur Respir J, 10 (1997), pp. 2508-2514
[92]
TAR Seemungal, GC Donaldson, EA Paul, JC Bestall, DJ Jeffries, JA Wedzicha.
Effect of exacerbation on quality of life in patients with chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 157 (1998), pp. 1418-1422
[93]
JJ Soler, L Sánchez, P Román, MA Martínez, M Perpiña.
Risk factors of emergency care and admissions in COPD patients with high consumption of health resources.
Resp Med, 98 (2004), pp. 318-329
[94]
G Gudmundsson, T Gislason, E Lindberg, R Hallin, CS Ulrik, E Brondum, et al.
Mortality in COPD patients discharged from hospital: the role of treatment and co-morbidity.
Respir Res, 7 (2006), pp. 109
[95]
DA Gerardi, L Lovett, ML Benoit-Connors, JZ Readrdon, RL ZuWallack.
Variables related to increased mortality following out-patient pulmonary rehabilitation.
Eur Respir J, 9 (1996), pp. 431-435
[96]
C Esteban, JM Quintana, M Aburto, J Moraza, A Capelastegui.
A simple score for assessing stable chronic obstructive pulmonary disease.
QJM, 99 (2006), pp. 751-759
[97]
JJ Soler Cataluña.
El papel de las exacerbaciones en la historia natural de la EPOC.
Arch Bronconeumol, 43 (2007), pp. 55-58
[98]
H Gunen, SS Hacievligyagil, F Kosar, LC Mutlu, G Gulbas, E Pehlivan, et al.
Factors affecting survival of hospitalised patients with COPD.
Eur Respir J, 26 (2005), pp. 234-241
[99]
JV Lightowler, JA Wedzicha, MW Elliot, FS Ram.
Non-invasive positive pressure ventilation to treat respiratory failure resulting from exacerbations of chronic obstructive pulmonary disease: Cochrane systematic review and meta-analysis.
BMJ, 326 (2003), pp. 185-189
[100]
PK Plant, JL Owen, MW Elliot.
Non-invasive ventilation in acute exacerbations of chronic obstructive pulmonary disease: long term survival and predictors of in-hospital outcome.
Thorax, 56 (2001), pp. 708-712
[101]
A Alsaedi, DD Sin, FA McAlister.
The effects of inhaled corticosteroids in chronic obstructive pulmonary disease: a systematic review of randomised placebo-controlled trials.
Am J Med, 113 (2002), pp. 59-65
[102]
DD Sin, L Wu, JA Anderson, NR Anthonisen, AS Buist, PS Burge, et al.
Inhaled corticosteroids and mortality in chronic obstructive pulmonary disease.
Thorax, 60 (2005), pp. 992-997
[103]
PM Calverley, JA Anderson, B Celli, GT Ferguson, C Jenkins, PW Jones, et al.
Salmeterol and fluticasone propionate and survival in chronic obstructive pulmonary disease.
N Engl J Med, 356 (2007), pp. 775-789
[104]
P Calverley, R Pauwels, J Vestbo, P Jones, N Pride, A Gulsuik, et al.
Combined salmeterol and fluticasone in the treatment of chronic obstructive pulmonary disease: a randomised controlled trial.
[105]
W Szafransky, A Cukier, A Ramírez, G Menga, R Sansores, S Nahabedian, et al.
Efficacy and safety of budesonide/formoterol and formoterol in chronic obstructive pulmonary diseases.
Eur Respir J, 22 (2003), pp. 912-918
[106]
DE Niewoehner, K Rice, C Cote, D Paulson, JA Cooper Jr, L Kordicki, et al.
Prevention of exacerbations of chronic obstructive pulmonary disease with tiotropium, a once-daily inhaled anticholinergic bronchodilator: a randomized trial.
Ann Intern Med, 143 (2005), pp. 317-326
[107]
I Tille-Leblond, CH Marquette, T Pérez, A Scherpereel, C Zanetti, AB Tonnel, et al.
Pulmonary embolism in patients with unexplained exacerbation of chronic obstructive pulmonary disease: prevalence and risk factors.
Ann Intern Med, 144 (2006), pp. 390-396
[108]
JL Carson, MA Kelley, AE Duff, JF Weg, WJ Fulkerson, HI Palevsky, et al.
The clinical course of pulmonary embolism.
N Engl J Med, 326 (1992), pp. 1240-1245
[109]
JL Carson, ML Terrin, A Duff, MA Kelley.
Pulmonary embolism and mortality in patients with COPD.
Chest, 110 (1996), pp. 1212-1219
[110]
M Modesto-Alapont, D Nauffal-Manzur, E Ansótegui-Barrera, R Menéndez-Villanueva, A Ballesta, R Touza, et al.
¿Puede reducir la mortalidad de los pacientes con EPOC la profilaxis domiciliaria de la enfermedad tromboembólica venosa?.
Arch Bronconeumol, 42 (2006), pp. 130-134
[111]
K Gray-Donald, L Gibbons, SH Shapiro, PT Macklem, JG Martin.
Nutritional status and mortality in chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 153 (1996), pp. 961-966
[112]
S Martí, X Muñoz, J Ríos, F Morell, J Ferrer.
Body weight and comorbidity predict mortality in COPD patients treated with oxygen therapy.
Eur Respir J, 27 (2006), pp. 689-696
[113]
E Prescott, T Almdal, KL Mikkelsen, CL Tofteng, J Vestbo, P Lange.
Prognostic value of weight change in chronic obstructive pulmonary disease: results from the Copenhagen City Heart Study.
Eur Respir J, 20 (2002), pp. 539-544
[114]
JJ Soler, L Sánchez, P Román, MA Martínez, M Perpiñá.
Prevalencia de la desnutrición en pacientes ambulatorios con enfermedad pulmonar obstructiva crónica estable.
Arch Bronconeumol, 40 (2004), pp. 250-258
[115]
C Coronell, M Orozco-Levi, A Ramírez-Sarmiento, J Martínez-Llorens, J Broquetas, J Gea.
Prevalencia de la desnutrición en pacientes ambulatorios con enfermedad pulmonar obstructiva crónica estable.
Arch Bronconeumol, 38 (2002), pp. 580-584
[116]
MPKJ Engelen, AMWJ Schols, WC Baken, GJ Wesseling, EFM Wouter.
Nutritional depletion in relation to respiratory and peripheral skeletal muscle function in an outpatient population with chronic obstructive pulmonary disease.
Eur Respir J, 7 (1994), pp. 1793-1797
[117]
EM Baarends, AM Schols, R Mosstert, EF Wouters.
Peak exercise response in relation to tissue depletion in patients with chronic obstructive pulmonary disease.
Eur Respir J, 10 (1997), pp. 2807-2813
[118]
H Sahebjami, E Sathianpitayakul.
Influence of body weight on the severity of dyspnea in chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 161 (2000), pp. 886-890
[119]
R Shoup, G Dalsky, S Warner, M Davis, M Connors, M Khan, et al.
Body composition and health-related quality of life in patients with obstructive airways disease.
Eur Respir J, 10 (1997), pp. 1576-1580
[120]
K Marquis, R Debigaré, Y Lacasse, P LeBlanch, J Jobin, G Carrier, et al.
Midthigh muscle cross-sectional area is a better predictor of mortality than body mass index in patients with chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 166 (2002), pp. 809-813
[121]
AMWJ Schols, R Broekhuizen, CA Weling-Scheepers, EF Wouters.
Body composition and mortality in chronic obstructive pulmonary disease.
Am J Clin Nutr, 82 (2005), pp. 53-59
[122]
J Vestbo, E Prescott, T Almdal, M Dahl, BG Nordestgaard, T Andersen, et al.
Body mass, fat-free body mass, and prognosis in patients with chronic obstructive pulmonary disease from a random population sample. Findings from the Copenhagen City Heart Study.
Am J Respir Crit Care Med, 173 (2006), pp. 79-83
[123]
LP McGarvey, M John, JE Anderson, M Zvarich, R Wise.
Ascertainment of cause-specific mortality in COPD: operations of the TORCH clinical endpoint committee.
Torax, 62 (2007), pp. 411-415
[124]
DJ Hole, GC Watt, G Davey-Smith, GL Hart, GR Gillis, VM Hawthorne.
Impaired lung function and mortality risk in men and women: findings from the Renfrew and Paisley prospective population study.
BMJ, 313 (1996), pp. 711-715
[125]
HJ Schunemann, J Dorn, BJ Grant, W Winkelstein Jr, M Trevisan.
Pulmonary function is a long-term predictor of mortality in the general population: 29-year follow-up of the Buffalo Health Study.
Chest, 118 (2000), pp. 656-664
[126]
DD Sin, SF Man.
Why are patients with chronic obstructive pulmonary disease at increased risk of cardiovascular disease? The potential role of systemic inflammation in chronic obstructive pulmonary disease.
Circulation, 107 (2003), pp. 1514-1519
[127]
DD Sin, P Lacy, E York, SFP Man.
Effects of fluticasone on systemic markers of inflammation in chronic obstructive pulmonary disease.
Am J Respir Crit Care Med, 170 (2004), pp. 760-765
[128]
L Huiart, P Ernst, X Ranouil, S Suissa.
Low-dose inhaled corticosteroids and the risk of acute myocardial infarction in COPD.
Eur Respir J, 25 (2005), pp. 634-639
[129]
GJ Mancini, M Etminan, B Zhang, LE Levesque, M FitzGerald, JM Brophy.
Reduction of morbidity and mortality by statins, angiotensin-converting enzyme inhibitors, and angiotensin receptors blockers in patients with chronic obstructive pulmonary disease.
J Am Coll Cardiol, 47 (2006), pp. 2554-2560
[130]
V Soyseth, PH Brekke, P Smith, T Omland.
Statin use is associated with reduced mortality in COPD.
Eur Respir J, 29 (2007), pp. 279-283
[131]
A Chambellan, E Chailleux, T Similowski, the ANTADIR observatory group.
Prognostic value of the hematocrit in patients with severe COPD receiving long-term oxygen therapy.
Chest, 128 (2005), pp. 1201-1208
[132]
R Broekhuizen, EFM Wouters, EC Creutzberg, AMWJ Schols.
Raised CRP levels mark metabolic and functional impairment in advanced COPD.
Thorax, 61 (2006), pp. 17-22
[133]
P Joppa, D Petrasova, B Stancak, R Tkacova.
Systemic inflammation in patients with COPD and pulmonary hypertension.
Chest, 130 (2006), pp. 326-333
[134]
JB Soriano, JL Izquierdo.
EPOC en la vida y la muerte.
Arch Bronconeumol, 42 (2006), pp. 421-422
[135]
M Charlson, P Pompei, KL Ales, CR MacKenzie.
A new method of classifying prognostic comorbidity in longitudinal studies: development and validation.
J Chron Dis, 40 (1987), pp. 373-383
[136]
M Charlson, TP Szatrowski, J Peterson, J Gold.
Validation of a combined index.
J Clin Epidemiol, 47 (1994), pp. 1245-1251
[137]
DD Sin, NR Anthonisen, JB Soriano, AG Agustí.
Mortality in COPD: role of comorbidities.
Eur Respir J, 28 (2006), pp. 1245-1257
[138]
CG Cote, BR Celli.
Pulmonary rehabilitation and the BODE index in COPD.
Eur Respir J, 26 (2005), pp. 630-636
[139]
S Imfeld, KE Bloch, W Weder, EW Russi.
The BODE index after lung volume reduction surgery correlates with survival.
Chest, 129 (2006), pp. 873-878
[140]
BR Celli.
Predicting mortality in chronic obstructive pulmonary disease. Chasing the “Holy Grail”.
Am J Respir Crit Care Med, 173 (2006), pp. 1298-1299
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