Results from regressions using teacher-report-derived factor scores were also qualitatively similar to those in our primary analyses. We did not observe main effects of genotype; the main effect of physical discipline was significant (p<0.001 for delinquency and p=0.001 for aggression and externalizing). The effect of GxE on delinquent behavior did not achieve statistical significance (p=0.0804) although there was a trend in the expected direction. GxE effects on general externalizing and aggression were not statistically significant.