Mean (SD) baseline physiological characteristics of the patients sampled (n=29)
| FEV1=forced expiratory volume in 1 second; FVC=forced vital capacity; Pao2, Paco2=arterial oxygen and carbon dioxide tensions. | |
| M:F | 21:8 |
| No (%) current smokers | 16 (34%) |
| Mean (range) age (years) | 66 (47–81) |
| FEV1 (l) | 1.06 (0.41) |
| FEV1 (% predicted) | 38.7 (15.2) |
| FEV1/FVC (%) | 43.7 (14.1) |
| Pao2 (kPa) | 8.75 (0.91) |
| Paco2 (kPa) | 6.13 (0.81) |
| Pack years of smoking | 52.9 (42.2) |
| Daily inhaled steroid dosage (mg) | 1.20 (0.66) |