From:  Study protocol for a non-inferiority trial of electronic versus face-to-face brief intervention following alcohol screening in Zacatecas-Guadalupe, Mexico and Alexandra Township, South Africa

 Past 30-day alcohol use items.

Directions and drink definitions

The next questions ask about your use of alcohol in the past 30 days. If you’re unsure about any answer, please make your best guess.

South Africa standard drink definitions

When we ask about alcoholic drinks, one whole drink is:

  • A glass of wine (a full bottle of wine contains about 4 whole drinks).

  • A 330 mL can or bottle of regular beer or cider (a six-pack contains 6 whole drinks).

  • A quart of beer or cider contains 2 drinks.

  • A shot of liquor (such as whiskey, gin, vodka, or rum) or a drink with a shot of liquor in it (a 750 mL bottle contains 15 drinks).

Mexico standard drink definitions

When we ask about alcoholic drinks, one whole drink is:

  • A 350 mL glass, small bottle (longneck), or can of beer (a six-pack of beer contains 6 drinks).

  • A 250 mL glass, bottle, or can of malt liquor.

  • A small 150 mL glass of wine (a bottle of wine contains 5 drinks).

  • A 30 mL shot of liquor or distilled spirits (such as gin, whiskey, rum, or vodka) or a drink with a shot of liquor in it (a typical 600 mL bottle of distilled spirits contains 20 drinks).

Alcohol use itemsResponse
Alc 1. In the past 30 days, on how many days did you have at least one whole drink, more than a sip or taste, of any alcoholic beverage?_____ days (0–30)
Alc 2. In the past 30 days, on the days when you drank alcohol, about how many whole drinks did you typically have?_____ drinks (0–100)
Alc 3. You said you usually had [number from Alc 2] whole drinks when you drank alcohol. Thinking about the past 30 days, what was the greatest number of drinks with alcohol you had on any one day?_____ drinks (0–100)
Alc 4. In the past 30 days, on how many days did you have [number from Alc 3] alcoholic drinks?_____ days (0–30)
Alc 5. On how many days in the past 30 days did you have 6 or more alcoholic drinks on one occasion?_____ days (0–30)