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Burns, M.; Moskowitz, H.; Blomberg, R.D.; Fiorentino, D.; and Peck, R.C. In Proceedings of the T2007 Joint International Meeting of TIAFT/ICADTS/IIS, August 26-30, (2007) A case-control study funded by the National Highway Traffic Safety Administration (NHTSA) and the National Institute on Alcohol Abuse and Alcoholism (NIAAA) examined the relative crash risks associated with drivers' blood alcohol concentrations (BACs). The measure, relative crash risk, is defined as the ratio of the proportion of crash drivers to the proportion of control drivers in a BAC classification, compared to a similarly formed ratio of drivers with 0.00% BACs. The resulting detailed final report by Blomberg, Peck, Moskowitz, Burns and Fiorentino (2005) details both the extensive methodological development of the study and a first set of analyses of its data. This paper summarizes the study's approach and results. The specific objectives of the study were to: Determine the relative crash risk of drivers at various BACs compared to drivers with zero BACs while controlling for other factors (e.g., age, gender, drinking patterns); Determine the relative crash risk of groups of drivers (e.g., youth, males, heavy drinkers) at various BACs compared to similar groups with zero BACs.
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