Table 1.
Characteristics of study subjects
| Never smokers | Smokers | COPD | |
|---|---|---|---|
| Number | 8 | 8 | 18 |
| Gender (male/female) | 4/4 | 7/1 | 16/2 |
| Age (years) | 63 (58–74) | 66 (56–72) | 67 (59–71) |
| BMI | 28 (24–31) | 27 (22–30) | 21 (17–25) |
| Current-smoker/ex-smoker | NA | 6/2 | 11/7 |
| Smoking history (pack-years) | 0 | 38 (23–45) | 50 (32–61) |
| FEV1 post-bronchodilator (L) | 2.5 (2.1–2.7) | 2.4 (1.8–2.5) | 1.8 (1.5–2.2) |
| FEV1 post-bronchodilator (%predicted) | 98 (85–108) | 92 (82–101) | 68 (60–77) |
| FEV1/FVC post-bronchodilator (%) | 84 (75–88) | 76 (70–79) | 54 (51–61) |
| ICS (yes/no) | 0/8 | 0/8 | 9/9 |