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. Author manuscript; available in PMC: 2016 Jun 1.
Published in final edited form as: Neuropsychology. 2015 Jul 27;30(3):263–273. doi: 10.1037/neu0000214

Table 1.

Demographics of Traumatic Brain Injury and Comparison Groups

TBI (n = 77) Orthopedic Comparison (n = 30) Healthy Comparison (n = 40) Statistic (df) Significance
Ethnicity (n)
    Caucasian 44 11 25 X2(6, N =147) = 7.77 p = .26
    African American 10 8 7
    Hispanic 17 8 4
    Other/Mixed 6 3 4
Sex (n)
    Female 22 14 17 X2(2, N =147) = 4.06 p = .13
    Male 55 16 23
Maternal Education (M, SD, Range) 13.09(4.82)
3.00-21.00		 14.70(4.19)
3.00-21.00		 16.50(3.53)
3.00-21.00		 F(2, 144) = 8.11
Tukey HSD		 p < .01
Years of Age at Test (M, SD, Range) 13.23(3.24)
6.58-18.92		 12.48(2.82)
8.58-17.67		 12.08(3.53)
6.58-18.67		 F(2, 144) = 1.81 p = .17
IQ (M, SD, Range) 98.18(16.55)
57-138		 108.13(13.51)
83-140		 112.83(13.68)
83-140		 F (2, 144) = 13.42 p < .01