| Sex (M:F)* | 29:9 |
| Age (years) | 63.1 (7.0) |
| Smoking history (pack-years)† | 40.0 (10–90) |
| Smoking status (current:ex)* | 18:20 |
| Pre-bronchodilator FEV1 (l) | 1.79 (0.60) |
| Pre-bronchodilator FEV1 (% predicted) | 57.9 (12.9) |
| Post-bronchodilator FEV1 (% predicted) | 61.0 (12.6) |
| Reversibility (% from pre-bronchodilator FEV1) | 6.0 (6.0) |
| Pre-bronchodilator FEV1/FVC (%) | 54.4 (10.1) |
FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity.
Data are mean (SD) unless otherwise indicated.
*Numbers.
†Median (minimum − maximum).