Descriptive statistics for each of the externalizing behaviors and the composite externalizing score within each ancestry group are shown in Table I. Males reported higher externalizing behaviors compared to females in both EA (Male mean [SD] = 0.3 [1.05]; female mean [SD] = −0.24 [0.84]; p < 0.0001) and AA (Male mean [SD] = 0.35 [1.06]; female mean [SD] = −0.22 [0.86]; p < 0.0001) samples. Although EA and AA did not differ in their mean externalizing scores, EA respondents had significantly higher levels of alcohol dependence, alcohol abuse, and illicit drug abuse symptoms compared to AA respondents. AA respondents had significantly higher levels of illicit drug dependence and ASPD/CD symptoms compared to EA respondents.
