| Mean (SD) | COPD | Non-COPD |
| ISWT (m) | 187 (114) | 135 (92) |
| SGRQ - Symptoms | 60.5 (18.8) | 62.8 (21.9) |
| SGRQ - Activity | 78.0 (14.7) | 74.2 (15.6) |
| SGRQ – Impact | 48.3 (16.9) | 48.4 (16.6) |
| SGRQ – Total | 59.3 (13.8) | 58.6 (14.5) |
| HAD – Anxiety | 8.2 (4.6) | 7.5 (4.4) |
| HAD - Depression | 6.8 (3.3) | 5.5 (2.9) |