• Am J Public Health · Aug 2017

    Crash Fatality Rates After Recreational Marijuana Legalization in Washington and Colorado.

    • Jayson D Aydelotte, Lawrence H Brown, Kevin M Luftman, Alexandra L Mardock, Teixeira Pedro G R PGR Jayson D. Aydelotte, Kevin M. Luftman, Pedro G. R. Teixeira, Ben Coopwood, and Carlos V. R. Brown are with Trauma Service, Department of Surgery an, Ben Coopwood, and Brown Carlos V R CVR Jayson D. Aydelotte, Kevin M. Luftman, Pedro G. R. Teixeira, Ben Coopwood, and Carlos V. R. Brown are with Trauma Service, Department of Surgery and .
    • Jayson D. Aydelotte, Kevin M. Luftman, Pedro G. R. Teixeira, Ben Coopwood, and Carlos V. R. Brown are with Trauma Service, Department of Surgery and Perioperative Care, Dell Medical School at the University of Texas-Austin. Lawrence H. Brown is with the Emergency Medicine Residency Program, Department of Surgery and Perioperative Care, Dell Medical School at the University of Texas-Austin. Alexandra L. Mardock is with Rice University, Houston, TX.
    • Am J Public Health. 2017 Aug 1; 107 (8): 1329-1331.

    ObjectivesTo evaluate motor vehicle crash fatality rates in the first 2 states with recreational marijuana legalization and compare them with motor vehicle crash fatality rates in similar states without recreational marijuana legalization.MethodsWe used the US Fatality Analysis Reporting System to determine the annual numbers of motor vehicle crash fatalities between 2009 and 2015 in Washington, Colorado, and 8 control states. We compared year-over-year changes in motor vehicle crash fatality rates (per billion vehicle miles traveled) before and after recreational marijuana legalization with a difference-in-differences approach that controlled for underlying time trends and state-specific population, economic, and traffic characteristics.ResultsPre-recreational marijuana legalization annual changes in motor vehicle crash fatality rates for Washington and Colorado were similar to those for the control states. Post-recreational marijuana legalization changes in motor vehicle crash fatality rates for Washington and Colorado also did not significantly differ from those for the control states (adjusted difference-in-differences coefficient = +0.2 fatalities/billion vehicle miles traveled; 95% confidence interval = -0.4, +0.9).ConclusionsThree years after recreational marijuana legalization, changes in motor vehicle crash fatality rates for Washington and Colorado were not statistically different from those in similar states without recreational marijuana legalization. Future studies over a longer time remain warranted.

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