Table1.

Interaction of MAOA -LPR and CTQ scores on Brown-Goodwin Lifetime History of Aggression (BGHA) scores, violent behavior during incarceration and lifetime history of suicide attempts and/or self-mutilation.

	BGHA scores		Violent behavior during incarceration		Lifetime history of suicide attempts and/or self- mutilation
Variable	F	P	L-R χ2	P	L-R χ2	P
Age	24.83	<0.0001	8.54	0.0035	0.07	0.8
Psychoticism	15.68	<0.0001	2.73	0.098	6.98	0.0083
Neuroticism	39.8	<0.0001	3.61	0.058	21.19	<0.0001
Any substance dependence	10.10	0.0016	9.04	0.0026	9.68	0.0019
CTQ total continuous score	91.82	<0.0001	8.61	0.0034	17.66	<0.0001
MAOA-LPR H vs L	1.59	0.21	0.34	0.56	0.25	0.62
G*E: MAOA-LPR × CTQ	4.38	0.037	2.87	0.089	0.82	0.36
G*E: MAOA-LPR × Psychoticism	2.78	0.096	--	--	--	--
Whole model	40.13	<0.0001	56.59	<0.0001	101.92	<0.0001
Whole model variance, df	0.33, 8		0.08, 7		0.15, 7

L-R χ² = Likelihood Ratio chi square; df = degrees of freedom

MAOA-LPR H v L: high activity variant vs low activity variant

G*E: MAOA-LPR × CTQ contributes 0.013 of the total variance in BGHA aggression

Psychoticism and neuroticism scores derive from the Eysenck Personality Questionnaire

G*E interaction term MAOA-LPR × Psychoticism for violent behavior during incarceration, p = 0.85 and for suicide attempts / self-mutilation, p = 0.82. Therefore this interaction term was not included in these logistic regression analyses.