Table 1.
Subject characteristics
| Controls | COPD | Asthma | |
|---|---|---|---|
| Subjects | 9 | 10 | 4 |
| Age, mean ± SD years | 63.0 ± 6.7 | 68.2 ± 5.2 | 63.6 ± 3.1 |
| Men | 6 (66.7%) | 8 (80.0%) | 2 (50.0%) |
| Current-smokers | 2 (22.2%) | 1 (10.0%) | 0 |
| Former-smokers | 5 (55.6%) | 9 (90.0%) | 3 (75.0%) |
| Never-smokers | 2 (22.2%) | 0 | 1 (25.0%) |
| Smoker pack years, mean ± SD years | 11.8 ± 6.1 | 25.2 ± 8.1 | 12.1 ± 6.2 |
| FEV1 (% predicted), mean ± SD | 97.0 ± 13.7 | 72.6 ± 23.2 | 101.6 ± 9.3 |
| Inhaled corticosteroids | 0 | 2 (20.0%) | 3 (75.0%) |
| LABA | 0 | 3 (30.0%) | 1 (25.0%) |
| LAMA | 0 | 4 (40.0%) | 0 |
COPD Chronic obstructive pulmonary disease; FEV1 Forced expiratory volume in 1 s; LABA Long-acting beta-agonist; LAMA Long-acting muscarinic antagonist. 1 smoker pack year = 20 cigarettes (one pack) smoked daily for 1 year. Age, smoker pack years and FEV1 (% predicted) are presented as the mean ± standard deviation.SD: standard deviation.