Chunk #15 — MATERIALS AND METHODS — Measures

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Measures of current alcohol consumption and problems: two independent twin studies suggest a complex genetic architecture.

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Frequency of intoxication was assessed with the following question: “During the past year, how often did you use alcohol to get drunk?” Response options were: (1) 1 to 2, (2) 3 to 5, (3) 6 to 7, (4) 8, and (5) 9 to 11 times/year.