Participant reports of maternal and paternal history of alcohol-related problems/excessive drinking, respondent own regular smoking, cannabis dependence, history of CSA, conduct disorder (CD) and major depressive disorder (MDD) were assessed within the SSAGA interview. Maternal and paternal alcohol use problems were also independently assessed using the SSAGA, by querying: (a) Has drinking ever caused your biological mother/father to have problems with health, family, job or police, or other problems, and (b) Have you ever felt that your biological mother/father was an excessive drinker? Additionally, the mother’s report on her own and paternal alcohol use disorder symptoms was used to assess parental problem alcohol use. Endorsement of a) one or more alcohol problems by maternal report or b) either alcohol question by either twin/sibling was coded as a positive response for an alcohol-related misuse in that parent. Regular smoking was defined as smoking at least 20 cigarettes (lifetime) and smoking at least once per week for 2 months. CSA was queried through both trauma checklist and behavioral questions. Trauma checklist: a) Had ever been raped or sexually molested (trauma checklist); Behavioral:
