Head injury assessment (HIA) number, propensity and proportion to tackler for tackler and ball carrier body position combinations
| Tackler body position | Ball carrier body position | Events per match | HIA number | Propensity (95% CI), HIAs/1000 events | Incidence (95% CI), HIAs/1000 hours | Percentage of HIAs to tackler (95% CI) |
| Upright | Upright | 31 | 131 | 2.80 (2.36 to 3.32) | 2.16 (1.82 to 2.56) | 65 (56 to 73) |
| Bent at the waist | 9 | 28 | 1.99 (1.37 to 2.88) | 0.46 (0.32 to 0.67) | 46 (30 to 64) | |
| Falling/diving | 0.05 | 5 | 65.96 (27.46 to 158.48) | 0.08 (0.03 to 0.20) | 40 (12 to 77) | |
| Bent at the waist | Upright | 33 | 133 | 2.64 (2.23 to 3.13) | 2.19 (1.85 to 2.60) | 87 (80 to 92) |
| Bent at the waist | 48 | 83 | 1.14 (0.92 to 1.41) | 1.37 (1.10 to 1.70) | 66 (56 to 76) | |
| Falling/diving | 1 | 17 | 14.95 (9.29 to 24.05) | 0.28 (0.17 to 0.45) | 35 (17 to 59) | |
| Diving | Upright | 18 | 40 | 1.46 (1.07 to1.99) | 0.66 (0.48 to 0.90) | 98 (87 to 100) |
| Bent at the waist | 16 | 17 | 0.69 (0.43 to 1.11) | 0.28 (0.17 to 0.45) | 88 (13 to 53) | |
| Falling/diving | 1 | 10 | 4.89 (2.63 to 9.08) | 0.16 (0.09 to 0.31) | 50 (24 to 76) |