Table 1.
General characteristics of the study subjects
| Variable | Men | Women | Total |
|---|---|---|---|
| Total case | 7,488 | 11,034 | 18,522 |
| Colorectal cancer case | 112 (1.5) | 108 (1.0) | 220 (1.2) |
| Age at baseline (yr) | |||
| 20–29 | 349 (4.7) | 322 (2.9) | 671 (3.6) |
| 30–39 | 830 (11.1) | 1,096 (9.9) | 1,926 (10.4) |
| 40–49 | 1,356 (18.1) | 2,080 (18.9) | 3,436 (18.6) |
| 50–59 | 1,834 (24.5) | 3,016 (27.3) | 4,850 (26.2) |
| 60–69 | 2,173 (29.0) | 3,242 (29.4) | 5,415 (29.2) |
| 70–79 | 851 (11.4) | 1,142 (10.3) | 1,993 (10.8) |
| 80–89 | 91 (1.2) | 133 (1.2) | 224 (1.2) |
| ≥ 90 | 4 (0.1) | 3 (0.0) | 7 (0.0) |
| Education level (yr) | |||
| Uneducated | 880 (11.8) | 3,203 (29.0) | 4,083 (22.0) |
| 1–12 | 6,133 (81.9) | 7,603 (68.9) | 13,736 (74.2) |
| ≥ 13 | 422 (5.6) | 186 (1.7) | 608 (3.3) |
| Missing | 53 (0.7) | 42 (0.4) | 95 (0.5) |
| Total time of moderate physical activity (h/wk) | |||
| Never | 1,536 (20.5) | 1,357 (12.3) | 2,893 (15.6) |
| 0.5–7 | 2,010 (26.8) | 3,149 (28.5) | 5,159 (27.9) |
| ≥ 7 | 1,736 (23.2) | 3,009 (27.3) | 4,745 (25.6) |
| Missing | 2,206 (29.5) | 3,519 (31.9) | 5,725 (30.9) |
| Body mass index (kg/m2) | |||
| < 18.5 | 336 (4.5) | 381 (3.5) | 717 (3.9) |
| 18.5–22 | 3,215 (42.9) | 3,773 (34.2) | 6,988 (37.7) |
| 23–24 | 1,692 (22.6) | 2,459 (22.3) | 4,151 (22.4) |
| ≥ 25 | 1,796 (24.0) | 3,703 (33.6) | 5,499 (29.7) |
| Missing | 449 (6.0) | 718 (6.5) | 1,167 (6.3) |
Values are presented as number only or number (%).