Table 1.

Main data from Cochrane meta-analyses on pulmonary rehabilitation in COPD

Author, year [ref]	Number of trials included in the analysis	Weighted mean difference
Lacasse et al, 2002 [13]	23	Dyspnea score: 0.98 units, 95% Confidence Interval (95% CI) 0.74 - 1.22 units; n=9 trials. 6-minute walking distance: 49 m, 95% CI: 26 - 72 m; n=10 trials.
Lacasse et al. 2006 [14]	31	Dyspnea score: 1.0 units; 95% confidence interval: 0.8 to 1.3 units; n = 12 trials). 6-minute walking distance: 48 meters; 95% CI: 32 to 65; n = 16 trials).
McCarthy et al. 2015 [15]	65	Dyspnea: 0.79, 95% confidence interval (CI) 0.56 to 1.03; n = 19 trials 6-minute walking distance 43.93, 95% CI 32.64 to 55.21; n = 38 trials