Alcohol is not a dichotomous variable.
Vinson
D C
DC
D000428:Alcohol Drinking; D000437:Alcoholism / Q000517:prevention & control*; D005194:Family Practice; D006801:Humans; D008403:Mass Screening / Q000379:methods*; D019966:Substance-Related Disorders / Q000517:prevention & control; D011795:Surveys and Questionnaires; D014481:United States