Calculated HIA event propensity and period by playing position (tackle only)
| Position | HIA events | Tackles/ player/ match | Propensity (95% CI), HIAs per 1000 tackles | Matches/HIE/ player |
| Backs | ||||
| Fly-half | 44 | 4.95 | 2.93 (2.18 to 3.94) | 68.9 (51.3–92.6) |
| Scrum-half | 36 | 3.80 | 3.12 (2.24 to 4.33) | 84.2 (60.7–116.7) |
| Centre | 68 | 5.83 | 1.93 (1.52 to 2.45) | 89.2 (70.3–113.1) |
| Full-back | 31 | 2.05 | 4.99 (3.51 to 7.10) | 97.8 (68.8–139.1) |
| Wing | 41 | 2.65 | 2.55 (1.88 to 3.46) | 147.9 (108.9–200.9) |
| Forwards | ||||
| Hooker | 38 | 6.93 | 1.81 (1.32 to 2.49) | 79.8 (58.1–109.7) |
| Number 8 | 33 | 6.38 | 1.71 (1.22 to 2.41) | 91.9 (65.3–129.3) |
| Prop | 59 | 5.51 | 1.76 (1.36 to 2.27) | 102.8 (79.7–132.7) |
| Lock | 56 | 6.08 | 1.52 (1.17 to 1.98) | 108.3 (83.3–140.7) |
| Flanker | 54 | 7.38 | 1.21 (0.93 to 1.58) | 112.3 (86.0–146.6) |
HIA, head injury assessment.