Table 3 Baseline characteristics of COPD subjects with chronic bronchitis (CB) and those without CB within each cohort
From: Genetic susceptibility for chronic bronchitis in chronic obstructive pulmonary disease
| Â | COPDGene NHWs | GenKOLS | ECLIPSE | |||
|---|---|---|---|---|---|---|
CB | No CB | CB | No CB | CB | No CB | |
N | 844 | 1968 | 311 | 552 | 507 | 1257 |
Age, years | 62.8 (8.3) | 65.5 (8.0) | 65.3 (10.0) | 65.7 (10.1) | 62.3 (7.7) | 64.2 (6.8) |
Pack-years | 59.2 (28.6) | 55.1 (27.6) | 34.0 (20.4) | 30.9 (17.3) | 51.6 (30.2) | 49.8 (26.2) |
Current smoker (%) | 53.3 | 26.7 | 54.0 | 42.8 | 51.4 | 28.5 |
FEV1,% predicted | 48.6 (17.4) | 50.1 (18.2) | 46.9 (16.8) | 52.7 (17.5) | 46.3 (15.3) | 48.2 (15.7) |
Sex (% male) | 61.8 | 53.0 | 64.6 | 57.6 | 75.7 | 63.5 |