Table 1 Subject characteristics.
| n (%) | |
|---|---|
| Total | 80 110 (100) |
| Female | 44 651 (56) |
| Age at interview (years) | |
| 17–29 | 15 598 (20) |
| 30–49 | 37 047 (46) |
| 50–69 | 24 791 (31) |
| 70–89 | 2673 (3) |
| >89 | 1 (0) |
| Ethnicity | |
| White | 63 684 (79) |
| Black | 10 440 (13) |
| Asian | 3045 (4) |
| Other | 2922 (4) |
| Missing | 19 (0) |
| Current smokers (any in last year) | 34 274 (43) |
| Alcohol use in the previous year* | |
| Non‐users | 18 924 (24) |
| Up to two drinks per day | 45 472 (57) |
| More than two drinks per day | 8764 (11) |
| Body mass index (kg/m2); mean (SD) | 24.7 (4.1) |
| Underweight (<18.5) | 1971 (2) |
| Healthy weight (18.5–24.9) | 44 818 (56) |
| Overweight (25–29.9) | 26 379 (33) |
| Obese (⩾30) | 6942 (9) |
*The alcohol use category does not equal to 100%, because of missing values.