From: Genetic susceptibility for chronic bronchitis in chronic obstructive pulmonary disease
 | COPDGene NHWs | GenKOLS | ECLIPSE | |||
---|---|---|---|---|---|---|
COPD with CB | Controls | COPD with CB | Controls | COPD with CB | Controls | |
n | 844 | 2,534 | 311 | 808 | 507 | 178 |
Age, years | 62.8 (8.3) | 59.5 (8.7) | 65.3 (10.0) | 55.6 (9.7) | 62.3 (7.7) | 57.5 (9.4) |
Pack-years | 59.2 (28.6) | 37.8 (20.3) | 33.9 (20.2) | 19.7 (13.6) | 51.6 (30.2) | 32.1 (24.8) |
Current smoker (%) | 53.3 | 39.6 | 54.0 | 41.2 | 51.4 | 40.1 |
FEV1,% predicted | 48.6 (17.4) | 96.8 (11.0) | 46.9 (16.8) | 94.9 (9.2) | 46.3 (15.3) | 107.9 (13.7) |
Sex (% male) | 61.8 | 49.3 | 64.6 | 50.1 | 75.7 | 57.9 |