Table 1. Baseline characteristics of the enrolled subjects (n=3,875), including divided according to COPD status.
| All (n=3,875) | COPD (n=700) | No COPD (n=3,175) | |
|---|---|---|---|
| Age (years) | 57.4 (11.8) | 63.0 (10.5) | 56.2 (11.7)a |
| BMI | 27.0 (5.1) | 25.8 (5.1) | 27.2 (5.0)a |
| Pack-years | 32.2 (22.3) | 39.7 (23.2) | 30.5 (21.8)a |
| FEV1 (l) | 2.64 (0.88) | 1.90 (0.69) | 2.80 (0.83) |
| FEV1 (%pred.) | 88.6 (19.6) | 71.1 (19.1) | 92.5 (17.5) |
| FEV1/FVC | 0.75 (0.09) | 0.61 (0.07) | 0.79 (0.06) |
| MRC score | 1.7 (0.7) | 2.0 (0.8) | 1.7 (0.7)a |
Abbreviations: BMI, body mass index; COPD, chronic obstructive pulmonary disease; FEV1/FVC, forced expiratory volume 1/forced vital capacity; MCR, Medical Research Council.
a
P<0.001 COPD versus no COPD.