Rugby specific risk factors for injury incidence rate and proportion of playing season missed
| Injury incidence rate (per 1000 hours) | Proportion of season missed | ||||||
|---|---|---|---|---|---|---|---|
| Factor | N | Rate | RR (95% CI) | p Value | Proportion | RR (95% CI) | p Value |
| *Positional groups (position names as specified by International Rugby Board Regulation 14.1): front row (loose head prop, hooker, tight head prop); locks (left lock, right lock); loose forwards (left flanker, right flanker, number eight); inside backs (scrum half, fly half); midfield backs (left centre, right centre); outside backs (left wing, right wing, full back). | |||||||
| Grade | |||||||
| Under 19/18 (Reference) | 53 | 47 | 1.00 | 0.10 | 1.00 | ||
| Under 21 | 64 | 80 | 1.84 (1.17 to 2.89) | <0.01 | 0.11 | 1.04 (0.56 to 1.93) | 0.91 |
| Senior B | 37 | 81 | 1.85 (1.11 to 3.07) | 0.02 | 0.12 | 1.09 (0.54 to 2.19) | 0.79 |
| Senior A | 90 | 106 | 2.50 (1.67 to 3.74) | <0.01 | 0.12 | 1.11 (0.63 to 1.95) | 0.71 |
| Playing position* | |||||||
| Front Row (Reference) | 38 | 89 | 1.00 | 0.09 | 1.00 | ||
| Locks | 34 | 98 | 1.10 (0.69 to 1.76) | 0.66 | 0.09 | 0.91 (0.40 to 2.08) | 0.82 |
| Loose forwards | 58 | 77 | 0.85 (0.54 to 1.33) | 0.48 | 0.11 | 1.21 (0.60 to 2.44) | 0.59 |
| Inside backs | 38 | 69 | 0.75 (0.45 to 1.22) | 0.23 | 0.07 | 0.76 (0.33 to 1.76) | 0.52 |
| Midfield backs | 40 | 77 | 0.85 (0.52 to 1.41) | 0.52 | 0.21 | 2.55 (1.29 to 5.04) | <0.01 |
| Outside backs | 40 | 83 | 0.92 (0.57 to 1.49) | 0.73 | 0.12 | 1.33 (0.63 to 2.80) | 0.44 |
| Years of rugby participation | |||||||
| 0 to 3 years (Reference) | 52 | 97 | 1.00 | 0.16 | 1.00 | ||
| 4 to 5 years | 42 | 79 | 0.80 (0.51 to 1.24) | 0.31 | 0.07 | 0.42 (0.21 to 0.87) | 0.02 |
| 6 to 7 years | 55 | 75 | 0.75 (0.49 to 1.14) | 0.16 | 0.10 | 0.56 (0.31 to 1.03) | 0.06 |
| 8 years | 47 | 69 | 0.69 (0.43 to 1.09) | 0.11 | 0.10 | 0.58 (0.30 to 1.09) | 0.08 |
| >8 years | 52 | 89 | 0.91 (0.61 to 1.38) | 0.66 | 0.13 | 0.76 (0.43 to 1.33) | 0.32 |
| Representative experience (previous 12 months) | |||||||
| No (Reference) | 138 | 78 | 1.00 | 0.12 | 1.00 | ||
| Yes | 103 | 89 | 1.16 (0.88 to 1.54) | 0.27 | 0.10 | 0.80 (0.52 to 1.22) | 0.28 |
| Injury experience | |||||||
| No injuries in previous 12 months (Reference) | 22 | 50 | 1.00 | 0.08 | 1.00 | ||
| Previous season | 139 | 75 | 1.57 (0.88 to 2.80) | 0.11 | 0.10 | 1.21 (0.54 to 2.72) | 0.64 |
| Preseason | 83 | 109 | 2.41 (1.34 to 4.32) | <0.01 | 0.17 | 2.25 (0.99 to 5.11) | 0.05 |