Study one sample demographics (mean (SD))
| COPD | ILD | CHF | |
| n = 123 | n = 129 | n = 106 | |
| Male gender | 62 (51%) | 47 (36%) | 72 (68%) |
| Age, years | 69 (8) | 50 (12) | 68 (11) |
| FEV1 % predicted | 48 (16) | 69 (22) | – |
| FVC % predicted | 72 (19) | 69 (19) | – |
| FEV1:FVC % predicted | 55 (12) | 83 (8) | – |
| Left ventricular ejection fraction | – | – | 35 (15) |
| MRC grade (1–5) | 3.4 (1.1) | 3.0 (1.1) | 2.6 (1.1) |
| Borg-intensity | 3.1 (1.9) | 3.6 (2.1) | 2.2 (1.9) |
| Borg-distress | 4.5 (2.4) | 3.7 (2.2) | 3.4 (2.4) |
CHF, chronic heart failure; COPD, chronic obstructive lung disease; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; ILD, interstitial heart disease; MRC, Medical Research Council.