Table 2 Baseline characteristics of patients with COPD and healthy control subjects (means ± SD).
From: Angiotensin-converting enzyme I/D polymorphism in chronic obstructive pulmonary disease
n | Age | F/M | Pack/years | Smokers | Non-smokers | Ex-smokers | FEV1 (%) | FEV1/FVC | GOLD Stage | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
I | II | III | IV | ||||||||||
COPD all patients | 152 | 62.8 ± 11.1 | 48/104 | 31.1 ± 22.6 | 73 (48%) | 13 (9%) | 66 (43%) | 52.6 ± 20.9 | 58.6 ± 14.9 | 18 | 40 | 80 | 14 |
Stable COPD | 64 | 61.6 ± 11.7 | 20/44 | 28.6 ± 15.3 | 35 (55%) | 2 (3%) | 27 (42%) | 59.1 ± 18.9 | 60.2 ± 14.6 | 7 | 18 | 34 | 5 |
Instable COPD | 88 | 63.7 ± 10.7 | 28/60 | 32.8 ± 26.3 | 38 (43%) | 11 (13%) | 39 (44%) | 48.0 ± 21.1 | 57.4 ± 15.0 | 11 | 22 | 46 | 9 |
Control | 158 | 63.9 ± 18.4 | 96/62 | 18.7 ± 8.4 | 53 (34%) | 12 (8%) | 93 (59%) | 81.5 ± 20.1 | 96.8 ± 24.1 | ||||