in this analysis were taken from the series of questions for all types of alcohol combined. Frequencies refer to days per year. All consumption measures refer to the 12 months preceding the Wave 1 interview. Test-retest reliability was good for average daily volume of ethanol intake and frequency of risk drinking, with intraclass correlation coefficients (ICC) of .72 and .70, respectively and excellent for maximum quantity of drinks, ICC = .84 (Grant et al., 2003b).
