Table 1: Athletes Sex, Self-reported Concussion History, and Sport in the Low and High Contact Risk Groups.

	Low Contact (n = 228, 43%)	High Contact (n = 305, 57%)
% Male	40%	66%
Concussion history	12%	23%
Sport (% male)	Baseball (100%) Crew (0%) Golf (50%) Softball (0%) Swim/Diving (0%) Track/Field (59%) Tennis (0%) Volleyball (0%)	Basketball (50%) Field Hockey (0%) Football (100%) Gymnastics (0%) Lacrosse (65%) Soccer (46%) Wrestling (100%)