Baseline clinical characteristics of the patients according to their participation in pulmonary rehabilitation (PR)
| No PR | All PR | p-value | |
| Patients n | 130 | 116 | |
| Age yrs | 69.5±8.7 | 69.5±7.7 | 0.79 |
| FEV1 L | 0.93±0.29 | 1.05±0.3 | 0.21 |
| FEV1 % Pred | 29.9±9.1 | 33.3±8.6 | 0.03 |
| MMRC dyspnoea scale | 3.15±0.76 | 2.65±0.63 | <0.0001 |
| 6MWD m | 229.3±113 | 343.1±100 | <0.0001 |
| BMI kg·m−2 | 24.5±5.8 | 26.8±5.5 | 0.005 |
| BODE index | 6.94±1.97 | 5.07±1.5 | <0.0001 |
| Charlson index | 5±2.13 | 4.53±1.93 | 0.06 |
| Chronic O2 use % | 61.8 | 50 | <0.001 |
| Chronic steroid use % | 16.7 | 7.7 | <0.01 |
| Pa,O2 mmHg | 68.4±11 | 71±11 | 0.10 |
| Pa,CO2 mmHg | 42.7±7.8 | 40.9±6.6 | 0.12 |
| O2 saturation with exercise | 87.2±6 | 89.7±4.8 | 0.02 |
| Chronic bronchitis % | 53 | 59 | 0.12 |
| Current tobacco use at entry % | 29.7 | 27 | 0.001 |
| Smoking Hx Packs·yr−1 | 93.7±53 | 91.3±43 | 0.24 |
Data presented as mean±sd, unless otherwise stated. FEV1: forced expiratory volume in one second; % pred: percentage of predicted; MMRC: Modified Medical Research Council; 6MWD: 6-minute walk distance; BMI: body mass index; Pa,O2: arterial oxygen tension; Pa,CO2: carbon dioxide arterial tension; Hx: history.