Table 2. .

Athlete-Based Concussion Rates Among National Collegiate Athletic Association Student-Athletes in Collegiate Sports, National Collegiate Athletic Association Injury Surveillance Program, 2011–2012 Through 2014–2015 Academic Years

Sport	Counts			Rates per 1000 Athlete-Exposuresa (95% Confidence Interval)
	Overall	Competition	Practice	Overall	Competition	Practice
Men's
Baseball	13	9	4	0.09 (0.04, 0.14)	0.16 (0.06, 0.27)	0.04 (0.00, 0.08)
Basketball	76	23	53	0.38 (0.29, 0.46)	0.53 (0.31, 0.74)	0.34 (0.24, 0.43)
Football	552	237	315	0.75 (0.69, 0.81)	3.25 (2.84, 3.66)	0.48 (0.42, 0.53)
Ice hockey	266	211	55	0.74 (0.65, 0.83)	2.40 (2.07, 2.72)	0.20 (0.15, 0.25)
Lacrosse	45	22	23	0.30 (0.22, 0.39)	0.91 (0.53, 1.30)	0.19 (0.11, 0.26)
Soccer	31	18	13	0.26 (0.17, 0.35)	0.67 (0.36, 0.98)	0.14 (0.06, 0.21)
Wrestling	68	35	33	0.89 (0.68, 1.10)	4.31 (2.88, 5.74)	0.48 (0.32, 0.65)
Women's
Basketball	95	41	54	0.53 (0.43, 0.64)	1.00 (0.69, 1.31)	0.39 (0.29, 0.50)
Ice hockey	98	70	28	0.78 (0.63, 0.94)	2.11 (1.61, 2.60)	0.31 (0.19, 0.42)
Lacrosse	50	27	23	0.45 (0.32, 0.57)	1.28 (0.80, 1.77)	0.25 (0.15, 0.36)
Soccer	98	73	25	0.54 (0.43, 0.64)	1.65 (1.27, 2.03)	0.18 (0.11, 0.25)
Softball	40	23	17	0.26 (0.18, 0.35)	0.42 (0.25, 0.59)	0.18 (0.09, 0.26)
Volleyball	53	26	27	0.37 (0.27, 0.47)	0.64 (0.39, 0.88)	0.27 (0.17, 0.37)

^aAn athlete-exposure is defined as 1 student-athlete participating in 1 practice or 1 competition.