Ball carrier body position	Tackler 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	33	133	2.64 (2.23 to 3.13)	2.19 (1.85 to 2.60)	87 (80 to 92)
	Falling/diving	18	40	1.46 (1.07 to 1.99)	0.66 (0.48 to 0.90)	98 (87 to 100)
Bent at the waist	Upright	9	28	1.99 (1.37 to 2.88)	0.46 (0.32 to 0.67)	46 (30 to 64)
	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	16	17	0.69 (0.43 to 1.11)	0.28 (0.17 to 0.45)	88 (13 to 53)
Diving	Upright	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	1	17	14.95 (9.29 to 24.05)	0.28 (0.17 to 0.45)	35 (17 to 59)
	Falling/diving	1	10	4.89 (2.63 to 9.08)	0.16 (0.09 to 0.31)	50 (24 to 76)