Demographics and spirometry of participants who underwent bronchoscopy
| Never-smokers | Smokers | Patients with COPD | |
|---|---|---|---|
| Subjects | n=12 | n=12 | n=18 |
| Age (year) | 63.3±3.9 | 65.8±2.8 | 66.5±4.2 |
| Men/women | 10/2 | 10/2 | 14/4 |
| Current/ex-smokers | 0/0 | 9/3 | 8/10 |
| Smoking history pack (year) | 0 | 34 (30–41) | 38 (20–53) |
| FEV1% predicted | 94.2±4.8 | 92.6±3.4 | 46.8±7.4 |
| FEV1/FVC% | 75.2±1.4 | 73.3±3.3 | 42.4±5.6 |
| Inhaled corticosteroid use | 0 | 0 | n=6 |
Data are presented as median (IQR) for smoking history, mean±SD for all others.
COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity.