| Variable | Females | Males |
| Subjects n | 287 153 | 30 246 |
| Living in a rural area | 158 421 (55.2) | 13 466 (44.5) |
| Age at baseline years mean±sd | 51.1±10.4 | 54.4±11.9 |
| 30–39 | 47 094 (16.4) | 4600 (15.2) |
| 40–49 | 90 588 (31.5) | 7011 (23.2) |
| 50–59 | 89 483 (31.2) | 7798 (25.8) |
| 60–69 | 45 462 (15.8) | 7185 (23.8) |
| 70–79 | 14 526 (5.1) | 3652 (12.1) |
| Highest education completed | ||
| No formal school | 71 909 (25.0) | 2213 (7.3) |
| Primary school | 89 066 (31.0) | 8032 (26.6) |
| Middle/high school | 113 128 (39.4) | 15 121 (50.0) |
| College/university | 13 050 (4.5) | 4880 (16.1) |
| Household income yuan per year | ||
| <4999 | 27 099 (9.4) | 2538 (8.4) |
| 5000–9999 | 55 563 (19.3) | 4511 (14.9) |
| 10 000–19 999 | 84 947 (29.6) | 8595 (28.4) |
| 20 000–34 999 | 71 037 (24.7) | 8075 (26.7) |
| ≥35 000 | 48 507 (16.9) | 6527 (21.6) |
| BMI kg·m−2 | 23.8±3.4 | 23.9±3.2 |
| <18.5 | 11 872 (4.1) | 1089 (3.6) |
| 18.5–<22.5 | 94 185 (32.8) | 9296 (30.7) |
| 22.5–<25 | 82 687 (28.8) | 8942 (29.6) |
| 25–<30 | 84 546 (29.4) | 9853 (32.6) |
| ≥30 | 13 862 (4.8) | 1066 (3.5) |
Data are presented as n (%) or mean±sd, unless otherwise stated.