Table 1.

Demographic and background data

Demographic Data	DLPFC	NonDLPFC	NO LESION	ANOVA F value	ANOVA p value	Significant between-group differences
Age	58.68 (2.75)	58.88 (3.20)	59.52 (3.42)	0.91	0.41	none
Sex (% male)	100	100	100	n/a	n/a	none
Years of Education	14.74 (2.83)	14.93 (2.53)	15.19 (2.47)	0.3	0.74	none
Pre-combat AFQT	54.83 (27.75)	62.40 (24.78)	65.40 (22.91)	1.09	0.34	none
Post-combat AFQT	59.61 (24.20)	67.82 (22.81)	72.34 (22.99)	1.77	0.17	none
Post-combat Verbal IQ	102.84 (16.50)	106.89 (12.38)	109.87 (12.38)	2.16	0.12	none
Post-combat Verbal Comprehension	105.00 (17.53)	108.42 (13.60)	109.66 (12.04)	0.82	0.44	none
Total Percent Volume Loss (cm3)*	3.11 (1.98)	2.70 (3.59)	n/a	0.49	0.62	none

Data are presented as means with standard deviations in parentheses. “Age” refers to age at the time of Phase 3 evaluation. “Sex” refers to the percent of male veterans. “Years of Education” refers to the total number of years of education the veterans completed. “Pre-combat AFQT” refers to index scores on the Armed Forces Qualification Test, a battery of tests measuring basic cognitive function at the time of enlistment (pre-injury). “Post-combat AFQT” refers to index scores on the Armed Forces Qualification Test administered at Walter Reed Medical Center after injury. “Post-combat Verbal IQ” refers to the Phase 3 Verbal IQ Index score from the Wechsler Adult Intelligence Scale. “Post-combat Verbal Comprehension” refers to the Phase 3 Verbal Comprehension Index score from the Wechsler Adult Intelligence Scale. Significant between-group differences were determined with the Tukey’s honestly significant difference test.

^*An independent samples t-test was conducted (rather than an ANOVA) to determine significant between group differences for the DLPFC and NonDLPFC patient groups. The respective values represent the t score and the associated p value.