The analyses used cohorts of 12th-graders from the high school classes of 2005 to 2011 who answered questions regarding 5+ binge and 10+ and 15+ extreme binge drinking. Measures of 10+ and 15+ extreme binge drinking were included on one of six questionnaire forms. Multiple questionnaire forms were used to decrease respondent burden and were randomly assigned within classrooms to individuals. Analyses accounted for the complex multistage sample design, and the data were weighted to adjust for differential selection probabilities. Response rates for surveys from 2005–2011 were 79–85%, with nearly all non-response due to absenteeism. The weighted sample (N=16,332) is 52.3% girls, and 64.5% White, 11.0% Black, 13.1% Hispanic, and 11.5% Other race/ethnicity. The study was approved by a University of Michigan IRB.
