The vast majority of COGA's clinical and behavioral data are drawn from the comprehensive, reliable, valid and standardized assessment tool, the SSAGA that provides data on symptoms and diagnoses of substance use disorders and related psychiatric history (e.g., major depressive disorder, suicidal thoughts and behaviors, conduct disorder and posttraumatic stress disorder), detailed family history, family environment (e.g., parental discord, divorce, economic status, parental knowledge of their child's activities and friendships and parental supervision) and drinking behavior (e.g., lifetime maximum drinks in a single 24 h period, typical drinking) of each participant. The SSAGA has been updated to reflect changing diagnostic criteria, from DSM‐III‐R to DSM‐IV and DSM‐5. 10 , 11 , 12 It is modular in structure (e.g., the SUD section of the assessment is independent of the depression section), freely available (including access to a programmed version in Blaise/RedCap and coding algorithms; cogastudy.org) and has been translated into nine languages. Several U.S. national studies have used the SSAGA (e.g., National Consortium on Alcohol and Neurodevelopment in Adolescence—Adulthood, 13 Human Connectome Projects 14 ), and other interview assessments have used
