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Chunk #9 — Methods — Samples

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A Developmentally-Informative Genome-wide Association Study of Alcohol Use Frequency.
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were assessed every two years (Bucholz et al. 2017; Dick et al. in press). The Institutional Review Boards at all data gathering sites approved this study, and written consent (and assent for adolescents) was obtained from all participants. Reports between ages 12-17 (n=1,118, 49.73% female), 18-25 (n=2762, 52.28% female), and after age 26 (n=5,255, 53.80% female) were collected in Phase 4, Phase 1, and Phase 2 assessments as part of the SSAGA interviews (Bucholz et al. 1994).