Age (years) | | | |
11 | 19 (12.5%) | 133 | 1.0 |
12 | 61 (1630%) | 321 | 1.6 (0.9 to 2.8) |
13 | 67 (23.8%) | 214 | 2.1 (1.1 to 3.8) |
14 | 21 (24.1%) | 66 | 2.7 (1.4 to 5.5) |
Sex | | | |
Male | 72 (16.9%) | 353 | 1.0 |
Female | 96 (20.1%) | 382 | 1.4 (0.97 to 2.0) |
Conduct problems | | | |
Low | 43 (12.5%) | 302 | 1.0 |
Medium | 72 (19.6%) | 295 | 1.6 (1.1 to 2.4) |
High | 52 (28.7%) | 129 | 1.9 (1.2 to 3.1) |
Sporting activity (past week) | | | |
0–100 min | 40 (16.1%) | 209 | 1.0 |
120–160 min | 36 (22.8%) | 122 | 1.9 (1.1 to 3.3) |
180–220 min | 18 (11.0%) | 145 | 1.0 (0.6 to 1.9) |
240–340 min | 32 (20.9%) | 121 | 1.8 (1.1 to 3.2) |
⩾360 min | 42 (23.3%) | 138 | 2.3 (1.3 to 3.9) |
Abdominal pain (days in past month) | | | |
None | 69 (15.2%) | 385 | 1.0 |
1–7 days | 75 (21.0%) | 283 | 1.3 (0.9 to 1.9) |
>7 days | 20 (27.0%) | 54 | 1.9 (1.1 to 3.4) |