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Crash Fatality Rates After Recreational Marijuana Legalization in Washington and Colorado. 2017

Jayson D Aydelotte, and Lawrence H Brown, and Kevin M Luftman, and Alexandra L Mardock, and Pedro G R Teixeira, and Ben Coopwood, and Carlos V R Brown
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.

To 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. We 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. Pre-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). Three 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.

UI MeSH Term Description Entries
D007880 Legislation, Drug Laws concerned with manufacturing, dispensing, and marketing of drugs. Drug Laws,Food, Drug and Cosmetic Act,Narcotic Laws,Drug Legislation,Drug Law,Law, Drug,Law, Narcotic,Laws, Drug,Laws, Narcotic,Narcotic Law
D008297 Male Males
D008385 Marijuana Smoking Inhaling and exhaling SMOKE from CANNABIS. Cannabis Smoking,Hashish Smoking,Marihuana Smoking,Smoking Blunts,Smoking, Blunts,Blunt, Smoking,Blunts Smoking,Blunts Smokings,Blunts, Smoking,Smoking Blunt,Smoking, Cannabis,Smoking, Hashish,Smoking, Marihuana,Smoking, Marijuana,Smokings, Blunts
D009026 Mortality All deaths reported in a given population. CFR Case Fatality Rate,Crude Death Rate,Crude Mortality Rate,Death Rate,Age Specific Death Rate,Age-Specific Death Rate,Case Fatality Rate,Decline, Mortality,Determinants, Mortality,Differential Mortality,Excess Mortality,Mortality Decline,Mortality Determinants,Mortality Rate,Mortality, Differential,Mortality, Excess,Age-Specific Death Rates,Case Fatality Rates,Crude Death Rates,Crude Mortality Rates,Death Rate, Age-Specific,Death Rate, Crude,Death Rates,Determinant, Mortality,Differential Mortalities,Excess Mortalities,Mortalities,Mortality Declines,Mortality Determinant,Mortality Rate, Crude,Mortality Rates,Rate, Age-Specific Death,Rate, Case Fatality,Rate, Crude Death,Rate, Crude Mortality,Rate, Death,Rate, Mortality,Rates, Case Fatality
D003120 Colorado State bounded on the north by Wyoming and Nebraska, on the east by Kansas and Nebraska, on the south by New Mexico and Oklahoma, and on the west by Utah.
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000063 Accidents, Traffic Accidents on streets, roads, and highways involving drivers, passengers, pedestrians, or vehicles. Traffic accidents refer to AUTOMOBILES (passenger cars, buses, and trucks), BICYCLING, and MOTORCYCLES but not OFF-ROAD MOTOR VEHICLES; RAILROADS nor snowmobiles. Traffic Collisions,Traffic Crashes,Traffic Accidents,Accident, Traffic,Collision, Traffic,Collisions, Traffic,Crashes, Traffic,Traffic Accident,Traffic Collision
D014861 Washington State bounded by on the north by Canada, on the east by Idaho, on the south by Oregon, and on the west by the Pacific Ocean.
D016208 Databases, Factual Extensive collections, reputedly complete, of facts and data garnered from material of a specialized subject area and made available for analysis and application. The collection can be automated by various contemporary methods for retrieval. The concept should be differentiated from DATABASES, BIBLIOGRAPHIC which is restricted to collections of bibliographic references. Databanks, Factual,Data Banks, Factual,Data Bases, Factual,Data Bank, Factual,Data Base, Factual,Databank, Factual,Database, Factual,Factual Data Bank,Factual Data Banks,Factual Data Base,Factual Data Bases,Factual Databank,Factual Databanks,Factual Database,Factual Databases

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