The parental externalizing-disorder composite was created based on lifetime DSM-IV (American Psychiatric Association, 1994) alcohol dependence and abuse criteria, antisocial personality disorder criteria, and drug (cocaine, marijuana, sedatives, stimulants, opiates, and other substances) dependence and abuse criteria. Criterion counts were obtained from the SSAGA interviews (Bucholz et al., 1994; Hesselbrock et al., 1999). For participants for whom multiple assessments were available, data from the interview in which they endorsed the greatest number of alcohol dependence criterion counts were used. Bivariate correlations between externalizing indicators ranged between .54 and .84. Component scores from a principal component analysis were extracted to index externalizing disorders. The first principal component accounted for 68% of the common variance among the externalizing disorder variables with the following loadings: alcohol dependence, 0.86; alcohol abuse, 0.86; antisocial behavior, 0.80; drug dependence, 0.82; drug abuse, 0.79 (detailed in Salvatore et al., 2015).
