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Turning 21 and the associated changes in drinking and driving after drinking among college students
Kim Fromme1, Reagan R Wetherill, Dan J Neal
1Department of Psychology, The University of Texas at Austin, Austin, Texas 78712, USA. fromme@psy.utexas.edu
Objective:
The authors examined drinking and driving after drinking before and after turning 21.
Participants:
Participants were drawn from first time college students who were taking part in a 4-year longitudinal study of alcohol use and behavioral risks.
Methods:
Web-based longitudinal surveys collected data on drinking and driving after drinking from August 2004 through November 2007 (n = 1,817). A subset of participants (n = 224) also monitored their daily behavior during the month they turned 21 (January through May, 2007).
Results:
Typical frequency and quantity of alcohol use increased from ages 18 to 21 years, whereas quantity decreased between 21 and 23 years of age. Driving after drinking showed a 72% relative increase (6% absolute increase) in the 2 weeks after turning 21.
Conclusions:
Reaching the legal drinking age is associated with decreases in the amount of alcohol consumed per drinking occasion, but an increase in driving after drinking.
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