Table 2.

Demographics of mTBI participants based on the history of previous exposures

	High blast exposures (≥3 blasts, 48 males)	Low blast exposures (≤2, 154 males)	Statistical inference
Years of age	33.5 ± 6.6; [24, 49]	31.4 ± 7.4; [20, 50]	t = 1.83, P = 0.07
Years of education	14.2 ± 2.0; [12; 18]	13.6 ± 2.0; [11, 20]	t = 1.54, P = 0.13
Days since the major blast event	595.7 ± 225.8; [192, 1070]	556.4 ± 244.1 [107, 1074]	t = 0.76, P = 0.43
Percentage right‐handed	88%	88%	–
Number of blast exposures	4.5 ± 2.6[3, 19]	1.3 ± 0.6 [1, 2]	t = 8.34, P < 0.0001
Number of participants with microhemorrhages	2	2	–
Number of WMHs	4.7 ± 12.7; [0, 84] (45.83%)	5.2 ± 14.9 [0, 99] (51.28%)	t = 0.24, P = 0.8
NSI total	30.4 ± 13.0; [3, 55]	31.5 ± 13.9; [4, 68]	t = 0.47, P = 0.64
PCLC total	53.6 ± 16.3; [19, 84]	51.2 ± 16.2; [21,85]	t = 0.82, P = 0.42

Numbers are shown as mean ± SD, and [] is the range.

NSI, Neurobehavioral Symptom Inventory; PCLC, PTSD Check List‐Civilian Version; WMHs, white matter hyperintensities.