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. 2015 Feb 24;10(8):1038–1044. doi: 10.1093/scan/nsu155

Table 1.

Mean ± standard deviations and statistic of demographic characteristics of pTBI and HC

Group pTBI = 102 HC = 31 Statistics t-value P-value
Age (years) 63.38 ± 3.09 63.42 ± 3.82 −0.055 0.956
Education (years) 14.62 ± 2.20 15.06 ± 2.17 −0.990 0.324
Handedness (R:A:L) 79:2:21 24:2:5 χ2 = 1.836 0.399
AFQT (percentile) 66.48 ± 22.84 72.90 ± 17.05 −1.23 0.219

R, right-handed; A, ambidextrous; L, left-handed; AFQT, Armed Forces Qualification Test for pre-injury general intelligence administered to individuals upon military induction.