Table 2

Calculated HIA event propensity and period by playing position (tackle only)

PositionHIA eventsTackles/ player/ matchPropensity (95% CI), HIAs per 1000 tacklesMatches/HIE/ player
Backs
 Fly-half444.952.93 (2.18 to 3.94)68.9 (51.3–92.6)
 Scrum-half363.803.12 (2.24 to 4.33)84.2 (60.7–116.7)
 Centre685.831.93 (1.52 to 2.45)89.2 (70.3–113.1)
 Full-back312.054.99 (3.51 to 7.10)97.8 (68.8–139.1)
 Wing412.652.55 (1.88 to 3.46)147.9 (108.9–200.9)
Forwards
 Hooker386.931.81 (1.32 to 2.49)79.8 (58.1–109.7)
 Number 8336.381.71 (1.22 to 2.41)91.9 (65.3–129.3)
 Prop595.511.76 (1.36 to 2.27)102.8 (79.7–132.7)
 Lock566.081.52 (1.17 to 1.98)108.3 (83.3–140.7)
 Flanker547.381.21 (0.93 to 1.58)112.3 (86.0–146.6)
  • HIA, head injury assessment.