Table 1:

Demographic information and causes of injury

Participant Characteristics	Number of Participants
Demographics
Age, time of imaging (range) (mean) (yr)	10–28 (16.1 ± 2.9)
Male participants (%)	44 (68.8)
Time from injury to imaging (mean) (days)	55 ± 91
Causes of mTBI
Sports injury (%)	42 (65.6%)
Motor vehicle collision (%)	6 (9.4%)
Bicycle accident (%)	2 (3.1%)
Fell down stairs (%)	2 (3.1%)
Fell off horse (%)	2 (3.1%)
Othera (%)	10 (15.6%)

^aVarious civilian injuries.