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College Students’ Underestimation of Blood Alcohol Concentration from Hypothetical Consumption of Supersized Alcopops: Results from a Cluster‐Randomized Classroom Study
Author(s) -
Rossheim Matthew E.,
Thombs Dennis L.,
Krall Jenna R.,
Jernigan David H.
Publication year - 2018
Publication title -
alcoholism: clinical and experimental research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.267
H-Index - 153
eISSN - 1530-0277
pISSN - 0145-6008
DOI - 10.1111/acer.13764
Subject(s) - confidence interval , alcohol , alcohol consumption , randomized controlled trial , blood alcohol , odds ratio , consumption (sociology) , cluster (spacecraft) , demography , odds , medicine , psychology , logistic regression , environmental health , poison control , injury prevention , surgery , biology , biochemistry , computer science , social science , sociology , programming language
Background Supersized alcopops are a class of single‐serving beverages popular among underage drinkers. These products contain large quantities of alcohol. This study examines the extent to which young adults recognize how intoxicated they would become from consuming these products. Methods The study sample included 309 undergraduates who had consumed alcohol within the past year. Thirty‐two sections of a college English course were randomized to 1 of 2 survey conditions, based on hypothetical consumption of supersized alcopops or beer of comparable liquid volume. Students were provided an empty can of 1 of the 2 beverages to help them answer the survey questions. Equation‐calculated blood alcohol concentrations ( BAC s)—based on body weight and sex—were compared to the students’ self‐estimated BAC s for consuming 1, 2, and 3 cans of the beverage provided to them. Results In adjusted regression models, students randomized to the supersized alcopop group greatly underestimated their BAC , whereas students randomized to the beer group overestimated it. The supersized alcopop group underestimated their BAC by 0.04 (95% confidence interval [CI]: 0.034, 0.053), 0.09 (95% CI : 0.067, 0.107), and 0.13 g/dl (95% CI : 0.097, 0.163) compared to the beer group. When asked how much alcohol they could consume before it would be unsafe to drive, students in the supersized alcopop group had 7 times the odds of estimating consumption that would generate a calculated BAC of at least 0.08 g/dl, compared to those making estimates based on beer consumption (95% CI : 3.734, 13.025). Conclusions Students underestimated the intoxication they would experience from consuming supersized alcopops. Revised product warning labels are urgently needed to clearly identify the number of standard drinks contained in a supersized alcopop can. Moreover, regulations are needed to limit alcohol content of single‐serving products.