Demographic risk characteristics, incidence proportion (%) and IID (95% CI)
| Overall | Leisure time PA | PE classes | Sports | ||||||
|---|---|---|---|---|---|---|---|---|---|
| N (%) | Injuries (%) | IID (95% CI) | Injuries (%) | IID (95% CI) | Injuries (%) | IID (95% CI) | Injuries (%) | IID (95% CI) | |
| Gender | |||||||||
| Boys | 493 (49.5%) | 44 (8.9%) | 0.35 (0.25 to 0.36) | 17 (3.4%) | 0.25 (0.13 to 0.37) | 13 (2.6%) | 0.59 (0.27 to 0.91) | 17 (3.4%) | 0.66 (0.35 to 0.97) |
| Girls | 503 (50.5%) | 60 (11.9%) | 0.57 (0.42 to 0.71) | 31 (6.2%) | 0.53 (0.35 to 0.72) | 9 (1.8%) | 0.41 (0.14 to 0.68) | 23 (4.7%) | 0.66 (0.39 to 0.93) |
| Age | |||||||||
| 9 | 59 (5.9%) | 7 (11.9%) | 0.56 (0.15 to 0.98) | 3 (5.1%) | 0.47 (0.00 to 1.01) | 2 (3.4%) | 0.82 (0.00 to 1.95) | 2 (3.4%) | 0.55 (0.00 to 1.31) |
| 10 | 353 (35.4%) | 33 (9.3%) | 0.39 (0.2 to 0.53) | 14 (4.0%) | 0.25 (0.12 to 0.38 | 8 (2.3%) | 0.51 (0.16 to 0.87) | 11 (3.1%) | 0.50 (0.20 to 0.79) |
| 11 | 454 (45.6%) | 45 (9.9%) | 0.43 (0.31 to 0.56) | 24 (5.3%) | 0.43 (0.26 to 0.60) | 9 (2.0%) | 0.45 (0.16 to 0.74) | 16 (3.5%) | 0.58 (0.30 to 0.87) |
| 12 | 130 (13.1%) | 19 (14.6%) | 0.36 (0.35 to 0.92) | 7 (5.4%) | 0.41 (0.11 to 0.72) | 3 (2.3%) | 0.53 (0.00 to 1.14) | 11 (8.5%) | 1.50 (0.61 to 2.38) |
| Ethnicity | |||||||||
| Western | 727 (76%) | 78 (10.7%) | 0.45 (0.35 to 0.56) | 35 (4.8%) | 0.38 (0.26 to 0.51) | 15 (2.1%) | 0.47 (0.23 to 0.71) | 29 (4.0%) | 0.60 (0.38 to 0.82) |
| Non-western | 229 (24%) | 16 (7.0%) | 0.32 (0.16 to 0.48) | 6 (2.6%) | 0.20 (0.04 to 0.36) | 4 (1.7%) | 0.39 (0.01 to 0.78) | 6 (2.6%) | 0.62 (0.12 to 1.12) |
| Missing | 40 | ||||||||
| Socioeconomic status | |||||||||
| Low | 152 (20.3%) | 19 (12.5%) | 0.54 (0.30-0.79) | 9 (5.9%) | 0.43 (0.15 to 0.71) | 5 (3.3%) | 0.74 (0.09 to 1.39) | 6 (3.9%) | 0.84 (0.17 to 1.50) |
| Medium | 234 (31.2%) | 24 (10.3%) | 0.43 (0.60-0.60) | 7 (3.0%) | 0.23 (0.06 to 0.40) | 6 (2.6%) | 0.57 (0.11 to 1.03) | 14 (6.0%) | 0.95 (0.45 to 1.44) |
| High | 364 (48.5%) | 42 (11.5%) | 0.51 (0.36-0.66) | 25 (6.9%) | 0.60 (0.37 to 0.84) | 7 (1.9%) | 0.45 (0.12 to 0.78) | 11 (3.0%) | 0.44 (0.18 to 0.69) |
| Missing | 246 | ||||||||
| BMI* | |||||||||
| Q1 | 236 | 25 (10.6%) | 0.44 (0.26 to 0.61) | 12 (5.1%) | 0.38 (0.17 to 0.60) | 6 (2.5%) | 0.58 (0.12 to 1.05) | 10 (4.2%) | 0.64 (0.25 to 1.04) |
| Q2 | 238 | 29 (12.2%) | 0.51 (0.33 to 0.70) | 12 (5.0%) | 0.39 (0.17 to 0.60) | 4 (1.7%) | 0.38 (0.01 to 0.76) | 14 (5.9%) | 0.93 (0.44 to 1.41) |
| Q3 | 237 | 25 (10.5%) | 0.48 (0.29 to 0.67) | 11 (4.6%) | 0.39 (0.16 to 0.63) | 5 (2.1%) | 0.48 (0.06 to 0.90) | 9 (3.8%) | 0.65 (0.23 to 1.08) |
| Q4 | 236 | 21 (8.9%) | 0.40 (0.23 to 0.57) | 10 (4.2%) | 0.35 (0.13 to 0.56) | 7 (3.0%) | 0.67 (0.17 to 1.17) | 6 (2.5%) | 0.47 (0.09 to 0.84) |
| Missing | 49 | ||||||||
| MOPER score | |||||||||
| Low | 164 (16.6%) | 15 (19.1%) | 0.47 (0.23 to 0.71) | 9 (5.5%) | 0.50 (0.17 to 0.83) | 3 (1.8%) | 0.42 (0.00 to 0.89) | 3 (1.8%) | 0.45 (0.00 to 0.97) |
| Medium | 660 (66.9%) | 69 (10.5%) | 0.45 (0.35 to 0.55) | 32 (4.8%) | 0.37 (0.24 to 0.50) | 16 (2.4%) | 0.55 (0.28 to 0.82) | 26 (3.9%) | 0.65 (0.40 to 0.89) |
| High | 163 (16.5%) | 19 (11.7%) | 0.47 (0.26 to 0.67) | 6 (3.7%) | 0.29 (0.06 to 0.52) | 3 (1.8%) | 0.42 (0.00 to 0.89) | 11 (6.7%) | 0.86 (0.35 to 1.38) |
| Missing | 9 | ||||||||
| Weekly exposure* | |||||||||
| Q1: <=5.00 h | 254 | 22 (8.7%) | 0.72 (0.42 to 1.02) | 9 (3.5%) | 0.71 (0.25 to 1.17) | 5 (2.0%) | 0.44 (0.05 to 0.83) | 10 (3.9%) | 1.57 (0.60 to 2.55) |
| Q2: 5.01–6.70 h | 245 | 26 (10.6%) | 0.55 (0.34 to 0.76) | 13 (5.3%) | 0.50 (0.23 to 0.78) | 6 (2.4%) | 0.56 (0.11 to 1.01) | 9 (3.7%) | 0.84 (0.29 to 1.40) |
| Q3: 6.71–9.00 h | 256 | 26 (10.2%) | 0.39 (0.24 to 0.54) | 13 (5.1%) | 0.33 (0.15 to 0.51) | 2 (0.8%) | 0.18 (0.00 to 0.42) | 11 (4.3%) | 0.70 (0.29 to 1.12) |
| Q4: >=9.01 h | 241 | 30 (12.4%) | 0.35 (0.22 to 0.47) | 13 (5.4%) | 0.27 (0.12 to 0.42) | 9 (3.7%) | 0.87 (0.30 to 1.44) | 10 (4.1%) | 0.36 (0.14 to 0.58) |
↵* Groups represent age- and gender-specific quartiles sampled from the total population.
BMI, body mass index; IID, injury incidence density; MOPER, motor performance; PA, physical activity.