Risk factors for injury incidence rate and proportion of season missed controlling for effects of other risk factors in the models
| Injury incidence rate (per 1000 hours) | Proportion of season missed | |||
|---|---|---|---|---|
| Factor | Odds ratio (95% CI) | p Value | Odds ratio (95% CI) | p Value |
| Injury experience | ||||
| No injuries in previous 12 months (Reference) | 1.00 | 1.00 | ||
| Previous season | 1.24 (0.70 to 2.18) | 0.45 | 1.46 (0.63 to 3.37) | 0.37 |
| Preseason | 1.81 (1.01 to 3.25) | 0.04 | 2.76 (1.13 to 6.72) | 0.02 |
| Grade | ||||
| Under 19/18 (Reference) | 1.00 | |||
| Under 21 | 1.84 (1.18 to 2.87) | <0.01 | ||
| Senior B | 1.69 (1.02 to 2.80) | 0.04 | ||
| Senior A | 2.35 (1.57 to 3.51) | <0.01 | ||
| Playing position | ||||
| Front row (Reference) | 1.00 | |||
| Lock | 0.67 (0.25 to 1.77) | 0.40 | ||
| Loose forwards | 1.06 (0.44 to 2.56) | 0.89 | ||
| Inside backs | 0.40 (0.14 to 1.20) | 0.10 | ||
| Midfield backs | 1.73 (0.66 to 4.53) | 0.26 | ||
| Outside backs | 1.06 (0.37 to 3.04) | 0.92 | ||
| Years rugby participation | ||||
| 0 to 3 years (Reference) | 1.00 | |||
| 4 to 5 years | 0.42 (0.19 to 0.93) | 0.03 | ||
| 6 to 7 years | 1.11 (0.57 to 2.18) | 0.76 | ||
| 8 years | 0.58 (0.29 to 1.16) | 0.12 | ||
| >8 years | 1.44 (0.71 to 2.89) | 0.30 | ||
| Strenuous physical activity (hours/week) | ||||
| <5 (Reference) | 1.00 | |||
| 5 to 9 | 1.21 (0.56 to 2.63) | 0.62 | ||
| 10 to 19 | 1.14 (0.49 to 2.63) | 0.76 | ||
| 20 to 39 | 1.19 (0.44 to 3.23) | 0.73 | ||
| >39 | 3.71 (1.58 to 8.72) | <0.01 | ||
| Cigarette smoking | ||||
| Non-smoker (Reference) | 1.00 | |||
| Ex-smoker | 1.86 (1.02 to 3.38) | 0.04 | ||
| Current smoker | 1.97 (1.13 to 3.43) | 0.01 | ||
| Stress (previous 4 weeks) | ||||
| None (Reference) | 1.00 | |||
| A little | 2.50 (1.34 to 4.66) | <0.01 | ||
| Somewhat | 2.03 (0.97 to 4.22) | 0.05 | ||
| A lot | 1.57 (0.45 to 5.47) | 0.47 | ||
| Body mass index (BMI) | ||||
| <23 (Reference) | 1.00 | |||
| 23 to 24.9 | 0.31 (0.14 to 0.67) | <0.01 | ||
| 25 to 26.4 | 0.31 (0.15 to 0.66) | <0.01 | ||
| 26.5 to 27.9 | 0.32 (0.14 to 0.71) | <0.01 | ||
| >27.9 | 0.24 (0.10 to 0.63) | <0.01 | ||
| Aerobic endurance (20 m multistage shuttle run test - repeats) | ||||
| ≤96 (Reference) | 1.00 | |||
| 97 to 105 | 1.92 (0.94 to 3.92) | 0.07 | ||
| 106 to 117 | 0.74 (0.34 to 1.62) | 0.44 | ||
| 118 to 127 | 0.58 (0.25 to 1.35) | 0.19 | ||
| >127 | 1.27 (0.52 to 3.07) | 0.59 | ||
| Anaerobic endurance (high intensity shuttle run test) | ||||
| >83 (Reference) | 1.00 | |||
| 65 to 83 | 2.78 (1.28 to 6.04) | <0.01 | ||
| 57 to 64 | 2.73 (1.28 to 5.83) | <0.01 | ||
| 37 to 50 | 1.64 (0.73 to 3.67) | 0.22 | ||
| <37 | 1.63 (0.67 to 4.00) | 0.27 | ||
| Push ups (number) | ||||
| ≤19 (Reference) | 1.00 | |||
| 20 to 23 | 4.42 (1.85 to 10.53) | <0.01 | ||
| 24 to 28 | 3.88 (1.65 to 9.14) | <0.01 | ||
| 29 to 33 | 3.52 (1.43 to 8.65) | <0.01 | ||
| >33 | 2.68 (1.05 to 6.85) | 0.04 | ||