Table 1

Demographic and clinical characteristics of subjects

ControlPatients with TBIP value
N3683
Age59.11 (3.89)58.13 (2.94)0.182
Education15.40 (2.43)14.76 (2.34)0.186
RaceWhite: n=34 (94.4%); black: n=2White: n=77 (92.8%); black n=4 (4.8%); Asian: n=1 (1.2%); Amer Ind: n=1 (1.2%)
EthnicityNon-hisp: n=34 (94.4%)Non-hisp: n=78 (94.0%)
MMSE Total29.59 (.62)28.33 (2.29)0.00001*
WAIS FIQ111.51 (11.69)103.24 (14.80)0.0016*
WAIS PIQ110.43 (12.26)100.93 (16.22)0.00007*
WAIS VIQ110.69 (11.32)104.53 (14.82)0.0154
AFQT before injury71.21 (18.22)63.68 (23.69)0.063
AFQT after injury or after service72.63 (19.32)64.26 (26.10)0.055
HAM-A total4.09 (4.31)2.72 (3.69)0.102
BDI total11.61 (9.97)9.43 (9.03)0.264
Obsessions4.41 (5.12)5.35 (5.13)0.361
Compulsions13.33 (8.65)14.01 (9.17)0.700
Tics1.36 (2.38)2.28 (2.45)0.059
Mean diff obsessions0.10 (0.32)0.10 (0.21)1.0
Mean diff compulsions0.18 (0.55)0.22 (0.39)0.694
Mean diff tics0.07 (0.18)0.13 (0.18)0.099
  • P Value=unadjusted p value, with significance indicated by * for false discovery rate corrected p<0.05.

  • Numbers are reported as means with SD in parentheses except for Race and Ethnicity where number of subjects is reported and percentage of patients is reported in parentheses. ‘Obsessions’, ‘compulsions’, and ‘Tics’ refer to the mean score on the Y-BOCS and YGTSS Symptom Checklists (see Methods section for details of the measures). ‘Mean diff obsessions’, ‘mean diff compulsions’, and ‘mean diff tics’ refer to the mean difference between precompulsion and post compulsion, obsession, and tic score respectively (see Methods section for details of the measures).

  • n, number of subjects; MMSE, Folstein Mini-Mental State Examination; WAIS, Wechsler Adult Intelligence Scale; VIQ, Verbal IQ score; PIQ, performance IQ score; FIQ, Full Scale IQ score; AFQT, Armed Forces Qualification Test; BDI, Beck Depression Inventory II total score; HAM-A, Hamilton Anxiety Scale Total score