Table 1.

Pooled summary estimates of relative risk for concussion incidence comparing females versus males in various sports, measured per 10,000 athlete-exposures

Sport	No. of Comparisons	Relative Risk (95% CI)	P
Baseball/Softball	24	1.45 (0.94-2.26)	0.10
Basketball	28	1.99 (1.56-2.54)	<0.01
Ice hockey	10	0.90 (0.70-1.17)	0.44
Lacrosse	18	0.94 (0.73-1.21)	0.65
Soccer	31	1.76 (1.43-2.16)	<0.01
Swimming/Diving	6	1.65 (0.35-7.81)	0.53
Track and field	11	1.41 (0.43-4.56)	0.57

Boldfaced P values indicate statistical significance.