Characteristics of subjects with COPD and resistant smokers
| COPD (n = 165) | Resistant smokers (n = 76) | |
|---|---|---|
| Mean (SD) smoking history (pack years) | 44.9 (22.5) | 45.8 (31.3) |
| Mean (SD) age (years) | 66.8 (10.3) | 53.7 (10.8) |
| Male (%) | 55.2 | 56.0 |
| Mean (SD) FEV1 (% predicted) | 32.6 (13.3) | 95.8 (10.9) |