Mean (SE) clinical and functional characteristics of subject groups
| Subjects | Sex (M/F) | Age (years) | Smoke (pack years) | FEV1 (% pred) |
|---|---|---|---|---|
| NSM healthy controls (n=20) | 8/12 | 41.3 (2.8) | – | 104 (2.7) |
| CSM healthy controls (n=10) | 5/5 | 54 (4.5) | 43.5 (3.2) | 98 (4.9) |
| ExSM COPD (n=10) | 10/0 | 71.4 (1.0) | 41.5 (16.7) | 42.8 (4) |
| CSM COPD (n=10) | 9/1 | 67.1 (2.1) | 52.8 (7.8) | 38.3 (2.7) |
NSM = non-smokers; CSM = current smokers; ExSM = ex-smokers (smoking cessation >1 year); COPD = chronic obstructive pulmonary disease; FEV1 = forced expiratory volume in one second.