Table 3.

Estimated Rate of Sport-Related Concussion (SRC) per 10 000 Athlete-Exposures (AEs) in Practice and Competition During the Regular Season (Weeks 1–11)

Event	Year	SRCs	No. of Players	Weeks	Days	AEs	SRCs per 10 000 AEs	95% CI
Practice	2015–2016	650	38 591	11	4	1 698 004	3.83	3.53, 4.12
	2016–2017	607	36 571	11	4	1 609 124	3.77	3.47, 4.07
	2017–2018	516	35 583	11	4	1 565 652	3.30	3.01, 3.58
	2018–2019	508	33 962	11	4	1 494 328	3.40	3.10, 3.70
	2019–2020	460	32 728	11	4	1 440 032	3.19	2.90, 3.50
	Overall	2741	177 435	55	4	7 807 140	3.51	3.38, 3.65
Competition	2015–2016	1191	38 591	9	1	347 319	34.29	32.4, 36.3
	2016–2017	976	36 571	9	1	329 139	29.65	27.8, 31.6
	2017–2018	873	35 583	9	1	320 247	27.26	25.5, 29.1
	2018–2019	894	33 962	9	1	305 658	29.25	27.4, 31.2
	2019–2020	877	32 728	9	1	294 552	29.77	27.8, 31.8
	Overall	4811	177 435	45	1	1 596 915	30.13	29.28, 31.00
Overall		7552	177 435			9 404 055	8.03	7.85, 8.21