The work group considered adding quantity or frequency of consumption as a criterion. A putative criterion of five or more drinks per occasion for men and four or more drinks for women fit well with other criteria in the U.S. general population (36), as did at least weekly cannabis use and daily cigarette use (38, 40). However, issues included worsening of model fit (41), unclear utility among cannabis users (66), and lack of a uniform cross-national alcohol indicator (54). Quantifying other illicit drug consumption patterns is even more difficult.
