Offspring who had reached their 19th birthday were evaluated by Master’s level clinical interviewers using the Composite International Diagnostic Interview (CIDI; Janca et al 1992) to determine the presence or absence of a DSM-IV Axis I diagnosis. The CIDI-SAM (Substance Abuse Module; Cottler et al. 1989) was also administered in order to determine quantity, frequency, and pattern of drug and alcohol use. Interrater reliability for interviewers on the diagnostic instruments used in this study exceeded 90%.
