Table 2

Concussion rates per 1000 athlete exposures

Sport	Powell 1999	Schultz 2004	Hootman 2007	Gessel 2007	Lincoln 2011	Marar 2012
Level	High school	High school	College	High school	High school	High school
Years studied	1995–1997	1996–1999	1988–2004	2005–2006	1997–2008	2008–2010
Baseball	0.05	0.11	0.07	0.05	0.06	0.05
Softball	0.10	0.10	0.14	0.07	0.11	0.16
Boys’ basketball	0.11	0.10	0.16	0.07	0.10	0.16
Girls’ basketball	0.16	0.17	0.22	0.21	0.16	0.21
Boys’ soccer	0.18	0.23	0.28	0.22	0.17	0.19
Girls’ soccer	0.23	0.13	0.41	0.36	0.35	0.34
Football	0.59	0.33	0.37	0.47	0.60	0.64
Field hockey	0.09	NR	0.18	NR	0.10	0.22
Volleyball	0.02	NR	0.09	0.05	NR	0.06
Wrestling	0.25	0.09	0.25	0.18	0.17	0.22
Ice hockey			0.41			0.54
Overall		0.17	0.28	0.43	0.24	0.24

NR, not reported.