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. 2018 Jul 23;7:25. doi: 10.1186/s40169-018-0200-y

Table 3.

Demographic of the healthy controls and post-concussed groups N = 124

Healthy controls (HC) Post-concussed (PC)
n = 62 n = 62
Frequency Percent Frequency Percent
Country of origin
 USA 56 90.3 58 93.5
 Canada 1 1.6 0 0.0
 Mexico 2 3.2 1 1.6
 Latvia 2 3.2 0 0.0
 Czech Republic 0 0.0 1 1.6
 Belgium 0 0.0 1 1.6
 Slovakia 1 1.6 0 0
 Puerto Rico 0 0.0 1 1.6
Sport
 Collision 35 56.5 34 54.8
 Contact 23 37.1 26 41.9
 Non-contact 4 6.5 2 3.2
Type of sports
 Football 28 45.2 25 40.3
 Ice hockey 7 11.3 9 14.5
 Soccer 1 1.6 5 8.1
 Basketball 9 14.5 7 11.3
 Softball 9 14.5 7 11.3
 Baseball 1 1.6 4 6.5
 Volleyball 3 4.8 3 4.8
 Cheerleading 4 6.5 2 3.2
Level of sport
 Collegiate 56 90.3 53 85.5
 Semi professional 6 9.7 9 14.5
Nature of position
 Defensive 26 41.9 22 35.5
 Offensive 31 50.0 38 61.3
 Individual sport 5 8.1 2 3.2
Handiness
 Right 53 85.5 52 83.9
 Left 4 6.5 7 11.3
 Ambidextrous 5 8.1 3 4.8