title: Clinical predictors of the efficacy of a pulmonary rehabilitation programme in patients with COPD.
abstract: OBJECTIVE
  To identify predictors of success for an 8week pulmonary rehabilitation programme (PRP) in patients with chronic obstructive pulmonary disease (COPD).
  
  
  METHODS
  Sixty patients were stratified in subgroups according to baseline findings: airway obstruction (FEV(1) >/= or <50% pred), pulmonary hyperinflation (TLC > or <or=120% pred), BMI value (BMI > or <or=25), cardiovascular (CV) comorbidity, and resting PaO(2) (PaO(2) >/= or <60mmHg). Outcome measurements of PRP were: >54m increase in 6min walking test (6MWT), or >4points reduction in total score of S. George Respiratory Questionnaire (SGRQ). Logistic regression analysis was used.
  
  
  RESULTS
  After PRP there was a significant improvement in exercise tolerance and quality of life, which correlated with baseline FEV(1)/VC, PaO(2), SpO(2), 6MWT and SGRQ. SGRQ significantly decreased and 6MWT significantly increased after PRP in all subgroups, except for patients with CV comorbidities. Both univariate and multivariate logistic regression analyses showed that BMI>25 and resting PaO(2)<60mmHg were independent predictors of PRP efficacy in terms of improvement of 6MWT, but not of SGRQ scores.
  
  
  CONCLUSIONS
  Clinical and functional baseline findings do not predict the response to PRP in COPD. The greater efficacy in patients with BMI>25 or with PaO(2)<60mmHg may be due to a greater deconditioning in overweight patients, and to a larger room for improvement in hypoxemic patients.
authors.affiliation: Cardio-Thoracic and Vascular Department, University of Pisa, Italy. b.vagaggini@ao-pisa.toscana.it
authors.forename: Barbara
authors.initials: B
authors.lastname: Vagaggini
authors.forename: Francesco
authors.initials: F
authors.lastname: Costa
authors.forename: Sandra
authors.initials: S
authors.lastname: Antonelli
authors.forename: Claudia
authors.initials: C
authors.lastname: De Simone
authors.forename: Gianna
authors.initials: G
authors.lastname: De Cusatis
authors.forename: Federica
authors.initials: F
authors.lastname: Martino
authors.forename: Sabrina
authors.initials: S
authors.lastname: Santerini
authors.forename: Pierluigi
authors.initials: P
authors.lastname: Paggiaro
mesh_terms: D000368:Aged; D017079:Exercise Tolerance / Q000502:physiology; D005260:Female; D005541:Forced Expiratory Volume / Q000502:physiology; D006801:Humans; D008297:Male; D011237:Predictive Value of Tests; D011379:Prognosis; D029424:Pulmonary Disease, Chronic Obstructive / Q000503:physiopathology / Q000534:rehabilitation*; D011788:Quality of Life; D012129:Respiratory Function Tests / Q000379:methods; D012189:Retrospective Studies; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires; D016896:Treatment Outcome