Characteristics of study subjects
| COPD subjects receiving air(n = 5) | COPD subjects receiving oxygen(n = 18) | Healthy subjects receiving air(n = 5) | Healthy subjects receiving oxygen(n = 18) | |
|---|---|---|---|---|
| COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity. | ||||
| Data are expressed as mean (SD). | ||||
| Age (years) | 53 (6) | 55 (4) | 47 (3) | 46 (6) |
| Sex (M/F) | 3/2 | 11/7 | 2/3 | 5/13 |
| FEV1 (% predicted) | 60.9 (2.6) | 54.1 (3.1) | 101 (18) | 103 (15) |
| FVC (% predicted) | 72.1 (2.2) | 75.2 (4.3) | 119 (9) | 120 (10) |
| Pao2 (kPa) | 9.2 (0.4) | 7.2 (0.4) | 12.8 (0.4) | 13.1 (0.3) |
| Paco2 (kPa) | 5.2 (0.2) | 5.6 (0.2) | 4.8 (0.3) | 4.9 (0.2) |