Measuring Late Night Blood Alcohol Levels in a College Setting

More than 1,400 random late-night blood alcohol tests with matched surveys have been conducted every night of the week spanning every month of the school year. 57% of students sampled had a BAC level of 0.00 g/dL and 73% were at 0.05g/dL or less. Very strong social norms messages can be developed from these data to bolster the credibility of self-report based media campaigns. Protocols for data collection, safety and liability provisions, sample BAC distributions broken down by gender and school night/weekend night, BAC levels for students consuming at the "5/4 binge" level and the "NIH binge" level, and an assessment of the agreement of measured BAC levels with estimated BAC levels from self report survey data with will be presented.