Table 1

Average percent agreement (range across teams) in exposure and compliance data

	Training	Games	Overall
Exposure
Average % agreement	79.6	90.9	87.2
Range of % agreement	52.9–100.0	81.6–100.0	69.8–100.0
Mean κ value	0.75	0.53	0.64
Mouthguard use
Average % agreement	84.6	83.1	83.7
Range % agreement	0–100.0	68.4–100.0	34.2–100.0
Mean McNemar statistic	0.73	0.48	0.61
Headgear use
Average % agreement	96.2	91.7	93.6
Range % agreement	50.0–100.0	85.7–100.0	75.0–100.0
Mean McNemar statistic	0.92	0.93	0.92