• David P Phillips and Kimberly M Brewer.
• Department of Sociology, University of California at San Diego, San Diego, CA 92093-0533, USA. dphillips@ucsd.edu
• Addiction. 2011 Sep 1; 106 (9): 1614-22.

AimTo analyze the severity of automotive injuries associated with blood alcohol concentration (BAC) in increments of 0.01%.Design/SettingEpidemiological study using the Fatality Analysis Reporting System.ParticipantsAll people in US fatal automotive accidents, 1994-2008 (n = 1 495 667).MeasurementsThe ratio of serious: non-serious injuries for drivers, by BAC.FindingsAccident severity increases significantly even when the driver is merely 'buzzed', a finding that persists after standardization for various confounding factors. Three mechanisms mediate between buzzed driving and high accident severity: compared to sober drivers, buzzed drivers are significantly more likely to speed, to be improperly seatbelted and to drive the striking vehicle. In addition, there is a strong 'dose-response' relationship for all three factors in relation to accident severity (e.g. the greater the BAC, the greater the average speed of the driver and the greater the severity of the accident).ConclusionsThe severity of life-threatening motor vehicle accidents increases significantly at blood alcohol concentrations (BACs) far lower than the current US limit of 0.08%. Lowering the legal limit could save lives, prevent serious injuries and reduce financial and social costs associated with motor vehicle accidents.© 2011 Society for the Study of Addiction. No claim to original US government works.

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