Match activities responsible for concussion injuries as a function of match format (Rugby-7s, Rugby-15s) and playing position (backs, forwards, all players)
| Match activity | Proportion of concussion injuries, % (95% CI) | Risk ratio (95% CI) | ||||||
|---|---|---|---|---|---|---|---|---|
| Rugby-7s (n=34) | Rugby-15s (n=191) | Backs vs forwards | ||||||
| Backs (n=21) | Forwards (n=13) | All players (n=34) | Backs (n=90) | Forwards (n=101) | All players (n=191) | Rugby-7s | Rugby-15s | |
| Collision | 19.0 (2.3 to 35.8) | 30.8 (5.7 to 55.9) | 23.5 (9.3 to 37.8) | 31.1 (21.5 to 40.7) | 43.6 (33.9 to 53.2) | 37.7 (30.8 to 44.6) | 0.62 (0.19 to 2.06) | 0.71 (0.49 to 1.04) |
| Maul | 0.0 (−) | 0.0 (−) | 0.0 (−) | 0.0 (−) | 1.0 (0 to 2.9) | 0.5 (0 to 1.5) | – | 0.00 (−) |
| Ruck | 0.0 (−) | 7.7 (0 to 22.2) | 2.9 (0 to 8.6) | 6.7 (1.5 to 11.8) | 9.9 (4.1 to 15.7) | 8.4 (4.4 to 12.3) | 0.00 (−) | 0.67 (0.25 to 1.78) |
| Scrum | 0.0 (−) | 0.0 (−) | 0.0 (−) | 0.0 (−) | 1.0 (0 to 2.9) | 0.5 (0 to 1.5) | − | 0.00 (−) |
| Tackled | 33.3 (13.2 to 53.5) | 15.4 (0 to 35.0) | 26.5 (11.6 to 41.3) | 25.6 (16.5 to 34.6) | 10.9 (4.8 to 17.0) | 17.8 (12.4 to 23.2) | 2.17 (0.53 to 8.88) | 2.35* (1.21 to 4.54) |
| Tackling | 47.6 (26.3 to 69.0 | 38.5 (12.0 to 64.9) | 44.1 (27.4 to 60.8) | 33.3 (23.6 to 43.1) | 29.7 (20.8 to 38.6) | 31.4 (24.8 to 38.0) | 1.24 (0.54 to 2.81) | 1.12 (0.74 to 1.71) |
| Other | 0.0 (−) | 7.7 (0 to 22.2) | 2.9 (0 to 8.6) | 3.3 (0 to 7.0) | 4.0 (0.2 to 7.8) | 3.7 (0.1 to 6.3) | 0.00 (−) | 0.84 (0.19 to 3.66) |
*p≤0.005.