Problem Alcohol Use was assessed using items pertaining to whole life alcohol dependence and abuse from the Composite International Diagnostic Interview-Substance Abuse Module (CIDI-SAM; Cottler et al. 1989). The CIDI-SAM is a structured diagnostic interview that assesses DSM-IV abuse and dependence symptoms. At wave 1 the pencil and paper interview was used, whereas computerized CIDI-SAM was used at wave 2. Endorsed symptoms were summed and scores were regressed on age separately for males and females, then log transformed to approximate a normal distribution.
