Selected baseline demographic characteristics of the ARIC participants (1987–9)*
| Total(n = 13 972) | Women(n = 7789) | Men(n = 6183) | |
|---|---|---|---|
| BMI, body mass index; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity. | |||
| *All values are mean (SD) unless specified as percentages. | |||
| Age (years) | 54.2 (5.8) | 53.8 (5.7) | 54.6 (5.8) |
| Smoking status | |||
| Current smoker (%) | 26.2 | 24.8 | 28.0 |
| Former smoker (%) | 32.3 | 22.7 | 44.3 |
| Never smoker (%) | 41.5 | 52.5 | 27.7 |
| Ethnicity | |||
| Black (%) | 28.4 | 31.8 | 24.1 |
| White (%) | 71.6 | 68.2 | 75.9 |
| BMI (kg/m2) | 27.7 (5.4) | 27.9 (6.2) | 27.5 (4.2) |
| Height (cm) | 168.5 (9.3) | 162.4 (6.0) | 176.2 (6.6) |
| FEV1 (l) | 2.8 (0.8) | 2.4 (0.5) | 3.3 (0.7) |
| FVC (l) | 3.8 (1.0) | 3.2 (0.6) | 4.5 (0.9) |
| FEV1/FVC ratio (%) | 74.5 (8.1) | 75.6 (7.4) | 73.1 (8.6) |