Table 1

Summary of inter-rater reliability tests (κ statistic) achieved for 12 tackle risk factors by four video analysts

	κ Statistic
		Range
Variable	Average	From	To
BC playing position	0.90	0.88	0.93
BC speed	0.52	0.40	0.58
Sequence of tackle on BC	0.72	0.65	0.79
BC head/neck flexion	0.43	0.33	0.65
BC BRS in tackle	0.41	0.34	0.49
T1 direction of tackle on BC	0.49	0.28	0.65
T1 impact force	0.45	0.28	0.67
T1 type of tackle	0.54	0.45	0.64
T1 head position	0.54	0.49	0.66
T1 BRS on ground	0.44	0.32	0.59
T2 direction of tackle on BC	0.48	0.29	0.61
T2 head position	0.50	0.43	0.59
All variables	0.54	0.28	0.93

BC, ball carrier; BRS, body region struck; T1, Tackler-1; T2, Tackler-2.