Below is a description of each drug use category that is measured during the lifetime patterns of use and past 6-month TLFB interviews. These same drug categories will be assessed each year utilizing the TLFB format. Visual aids are only provided if the youth reported using the drug recently or in their lifetime to assist with quantification and accurate follow-up question on type of product, typical dosing, and route of administration.1.Alcohol (described as “alcohol such as beer, wine, or liquor – such as rum, vodka, gin, whiskey)”. The unit of measurement for lifetime quantity, max drinks, and 6-month TLFB is in standard drinks (http://rethinkingdrinking.niaaa.nih.gov), defined as 1 12-ounce bottle of beer or wine cooler, 1 5-ounce glass of wine, or 1 shot (1.25 ounces) of 80-proof alcohol. Visual aids with conversations of standard drinks are provided. On the TLFB, by measuring standard drinks, we will also be able to measure binge-drinking episodes (can be defined in several ways based on children’s and adolescents body sizes (Donovan, 2009)), drinks per drinking episode, and days of co-occurring use of other substance categories
