Chunk #6 — 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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Maximum drinks (Max Drinks) was the maximum number of drinks twins reported ever consuming in a 24-hour period, with 1 drink defined as 1 beer, 1 glass of wine, or 1 mixed drink containing hard liquor. Responses ranged from 1 to 100 (mean = 16.49, SD = 9.46).