Table 2 AUDIT-C versions used in this study

US General Population Sample (2001–2002 NESARC Surveys)[24]

AUDIT-C Question #1

During the last 12 months, about how often did you drink ANY alcoholic beverage? Never (0); 1 or 2 times in the last year (1); 3 to 6 times in the last year (1); 7 to 11 times in the last year (1); Once a month (1); 2 to 3 times a month (2); Once a week (2); 2 times a week (3); 3 to 4 times a week (3); Nearly every day (4); Every day (4)

AUDIT-C Question #2

Counting all types of alcohol combined, how many drinks did you USUALLY have on days when you drank during the last 12 months?* 1 or 2 (0); 3 or 4 (1); 5 or 6 (2); 7 to 9 (3); 10 or more (4)

AUDIT-C Question #3

During the last 12 months, about how often did you drink FIVE OR MORE drinks in a single day? Never (0); 1 or 2 times in the last year (1); 3 to 6 times in the last year (1); 7 to 11 times in the last year (1); Once a month (2); 2 to 3 times a month (2); Once a week (3); 2 times a week (3); 3 to 4 times a week (3); Nearly every day (4); Every day (4)

VA Outpatient Sample (2004–2007 SHEP Surveys)

AUDIT-C Question #1

How often have you had a drink containing alcohol in the past 12 months ? Consider a “drink” to be a can or bottle of beer, a glass of wine, a wine cooler, or one cocktail or a shot of hard liquor (like scotch, gin, vodka). Never (0); Monthly or less (1); 2 to 4 times a month (2); 2 to 3 times a week (3); 4 to 5 times a week (4); 6 or more times a week (4)

AUDIT-C Question #2

How many drinks containing alcohol did you have on a typical day when you were drinking in the past 12 months ? 0 drinks (Did not drink in the past 12 months) (0 points); 1 to 2 drinks (0); 3 to 4 drinks (1); 5 to 6 drinks (2); 7 to 9 drinks (3); 10 or more drinks (4).

AUDIT-C Question #3

How often did you have 6 or more drinks on one occasion in the past 12 months ? Never (0 points); Less than monthly (1); Monthly (2); Weekly (3); Daily or almost daily (4).