Table 1.

Demographics (age, ethnicity, education), handedness, estimates of verbal, and non-verbal intelligence, depressive symptoms, and self-report anger measures for the reactive aggressive (RA) vs. control group.

Participants (all male)	RA (4 full IED, 5 sub-clinical IED)	Controls (n = 9)	Test statistic	p-value
Age (years)	34.4 ± 7.5	31.8 ± 6.5	t(16) = −0.81	p = 0.430
Ethnicity (Black/Hispanic/Caucasian)	5/4/0	4/3/2	χ2 = 0.225	p = 0.324
Education (years)	12.9 ± 1.4	13.7 ± 1.3	t(16) = 1.12	p = 0.285
Handedness (right/left)	9/0	8/1	χ2 = 1.06	p = 0.303
Non-verbal intelligence: Wechsler Abbreviated Scale of Intelligence—Matrix Reasoning**	7 ± 3.2	12.1 ± 2.0	U = 6.5, n = 17	p = 0.004
Verbal intelligence: Wide Range Achievement Test III—Reading Scale (grade equivalent)	10.1 ± 3.6	12.5 ± 0.5	U = 24, n = 17	p = 0.277
Depressive Symptoms (BDI)*	7.6 ± 5.4	2.7 ± 3.4	U = 65, n = 18	p = 0.031
Trait anger (STAXI-2)***	23.2 ± 5.4	12 ± 3.8	t(16) = −5.12	p < 0.001
Anger expression out (STAXI-2)**	21.4 ± 5.1	14.2 ± 4.0	t(16) = −3.34	p = 0.004

Estimates of non-verbal and verbal intelligence were available for 15 participants (missing data for n = 1 RA [non-verbal], and n = 1 control [verbal]).

^*p < 0.05,

^**p < 0.01,

^***p < 0.001; Independent t-tests were applied to test for group differences of normally and Mann-Whitney U-tests to test for group differences of non-normally distributed variables.

The bold values indicate significant differences between groups.