Table 1. Meta-analyses of categorical studies of genetic associations with aggression.

Gene	N	OR	95% CI	P-value	p(Q)	I2(%)	95% CI
HTR1B	5	0.86	0.60–1.23	0.42	0.06	56	0–83
5HTTLPR	19	0.90	0.74–1.09	0.29	0	66	45–79
5HTT-VNTR	3	1.18	0.89–1.58	0.26	0.80	0	0–53
BDNF	4	0.86	0.65–1.13	0.27	0.20	35	0–77
COMT	19	0.84	0.63–1.02	0.08	0	64	41–78
SLC6A3a	3	1.19	0.91–1.56	0.20	0.92	0	0
DRD4a	4	1.40	0.87–2.26	0.17	0.09	53	0–85
MAOA-F	5	0.96	0.64–1.45	0.86	0.33	13	0–82
MAOA-M	17	0.82	0.65–1.05	0.13	0.01	50	13–71
TPH1	5	1.19	0.92–1.54	0.18	0.05	58	0–84
AR (CAG)	3	3.04	0.94–9.84	0.06	0	91	76–97
DRD2	3	1.30	0.99–1.71	0.06	0.26	25	0–92

Abbreviations: CI, confidence interval; I, I² test for heterogeneity; MAOA-F and MAOA-M, MAOA in females and males, respectively; N, number of studies included; OR, pooled odds ratio; p(Q), P-value of Cochran's Q test for heterogeneity.

^aGenotypic analysis of the dominant model for SLC6A3 and DRD4.