Although not central to the study hypotheses, post-hoc analyses were conducted to determine the extent to which study variables differed by sex. Findings revealed virtually no association with genotype, as Pearson’s correlation coefficients across SNPs ranged in absolute value from .003 to .12, with only one SNP achieving significance at an α = .05 (i.e., rs1824024), though not surviving correction for multiple testing. With respect to the effect of sex on peer group antisocial behavior, there was a trend toward significance (χ2, 420.57 = 1.853, p = .065), with males reporting higher levels than females.
