To measure alcohol use, adolescents were asked to report on how often they usually drank beer, wine, and liquor in the last 6 months. The 8 response options ranged from 0 (never) to 7 (every day). Adolescents also were asked to report on how much they usually drank on an average day during the past six months. The 10 response options ranged from 0 (I drank no liquor) to 9 (more than 8 drinks). A quantity × frequency score was calculated to reflect total alcohol consumption. Examination of the data suggested that the distribution was positively skewed, and therefore this variable was logarithmically transformed for analyses.
