title: Recent improvement in long-term survival after a COPD hospitalisation.
abstract: BACKGROUND
  Evidence-based international guidelines on chronic obstructive pulmonary disease (COPD), and their corresponding recommendations, were established to improve individual COPD prognosis, and ultimately to improve survival. The aim of this study was to determine whether the long-term mortality after discharge from a COPD hospitalisation has improved recently, and the effect of co-morbidity treatment in improving COPD prognosis.
  
  
  METHODS
  In a prospective cohort study design of two cohorts 7 years apart, patients discharged from the same university hospital after a COPD exacerbation were followed-up, and their outcomes compared. Demographic and clinical variables, as well as lung function, were collected with the same protocol by the same investigators. Comprehensive assessments of co-morbidities and treatments were undertaken. Kaplan-Meier survival curves were estimated, and outcomes were compared by means of Cox regression methods.
  
  
  RESULTS
  Overall, 135 participants in the 1996-7 cohort and 181 participants in the 2003-4 cohort were studied. Both cohorts were comparable in their baseline demographic and clinical variables, and median follow-up was 439 days. The 3-year mortality was lower in the 2003-4 cohort (38.7%) than in the 1996-7 cohort (47.4%) (p=0.017), and the RR of death after adjustment for gender, age, body mass index, co-morbidities, lung function and mMRC (modified Medical Research Council scale) dyspnoea was 0.66 (95% CI 0.45 to 0.97). Long-term survival improved in the second cohort for patients with COPD with heart failure or cancer (p<0.001).
  
  
  CONCLUSIONS
  A recent trend towards better prognosis of patients with COPD after hospital discharge is described and is likely to be associated with better management and treatment of COPD and co-morbidities.
authors.affiliation: Internal Medicine, Hospital Mútua de Terrassa, Pza. Dr. Robert no. 5, Terrassa 08221, Barcelona, Spain. 19908pam@comb.cat
authors.forename: Pere
authors.initials: P
authors.lastname: Almagro
authors.forename: M
authors.initials: M
authors.lastname: Salvadó
authors.forename: C
authors.initials: C
authors.lastname: Garcia-Vidal
authors.forename: M
authors.initials: M
authors.lastname: Rodriguez-Carballeira
authors.forename: M
authors.initials: M
authors.lastname: Delgado
authors.forename: B
authors.initials: B
authors.lastname: Barreiro
authors.forename: J L
authors.initials: JL
authors.lastname: Heredia
authors.forename: Joan B
authors.initials: JB
authors.lastname: Soriano
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002245:Carbon Dioxide / Q000097:blood; D004812:Epidemiologic Methods; D005260:Female; D005541:Forced Expiratory Volume; D006760:Hospitalization; D006801:Humans; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000097:blood; D010313:Partial Pressure; D010351:Patient Discharge; D011379:Prognosis; D029424:Pulmonary Disease, Chronic Obstructive / Q000188:drug therapy / Q000401:mortality* / Q000503:physiopathology; D012129:Respiratory Function Tests; D016896:Treatment Outcome
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen