Cannabis Awareness - Sensibilisation au cannabis 91 CANNABIS AND DRIVING (continued) CANNABIS ET CONDUITE? (suite) How risky is driving after cannabis use? Estimates vary on the relative risk of crash associated with cannabis use. While there needs to be additional research in this area, studies and surveys over the past several years do indicate an increased risk of crash following cannabis use. • A 2012 analysis showed that acute cannabis consumption doubled the risk of a fatal or serious injury crash. (Source: M. Asbridge, J. Hayden & J. Cartwright, “Acute cannabis consumption and motor vehicle collision risk: A systematic review of observational studies and meta-analysis” (2012) 344 British Medical Journal e536.) • A second 2012 analysis reported that cannabis consumption more than doubled the risk of a crash, and that the crash risk increased with the amount consumed and the frequency of use. (Source: M. Li et al.,“Marijuana Use and Motor Vehicle Crashes” (2012) 34 Epidemiologic Reviews 65, at 69.) • A recent study comparing British Columbia roadside survey results with post-mortem data reported that cannabis use alone increased the risk of a fatal crash fivefold and that cannabis use, when combined with alcohol, increased the risk fortyfold. (Source: A comparison of drug use by fatallyinjured drivers and drivers at risk. D. Beirness & E Beasley & P. Boase. Canadian Centre on Substance Use and Addiction, and Transport Canada. Proceedings of the 20th International Conference on Alcohol, Drugs and Traffic Safety, 2013) Studies estimating the number of crash deaths attributable to cannabis are concerning. • One study estimated that, in 2012, there were 75 cannabis-attributed crash deaths in Canada. (Source: The Impact of Cannabis on Road Safety in the Canadian Provinces: Estimates of Collisions, Casualties and Costs in 2012. A. Wettlaufer et al., (Ottawa: Canadian Centre on Substance Abuse, 2016, at 13) • Another study estimated that there were between 89 and 267 cannabis-related crash deaths in 2010. (Source: Crude estimates of cannabisattributed mortality and morbidity in Canada – implications for public health focused intervention priorities (2015) B. Fischer et al., 10 Journal of Public Health 1, at 2) À quel point est-il dangereux de conduire après avoir consommé du cannabis ? Le risque relatif de collision associé à la consommation de cannabis varie selon les estimations. Bien que des études supplémentaires s’imposent dans ce domaine, les études et les enquêtes menées depuis plusieurs années indiquent que la consommation de cannabis entraîne un risque accru de collision. • Selon une analyse menée en 2012, une forte consommation de cannabis double le risque d’une collision causant la mort ou des blessures graves. (Source: M. Asbridge, J. Hayden et J. Cartwright, « Acute cannabis consumption and motor vehicle collision risk: A systematic review of observational studies and meta-analysis” [2012] 344 British Medical Journal e536.) • Une deuxième analyse menée en 2012, indique que la consommation de cannabis fait plus que doubler le risque de collision et que ce risque augmente en fonction de la quantité consommée et de la fréquence de consommation. (Source : M. Li et coll., «Marijuana Use and Motor Vehicle Crashes » [2012] 34 Epidemiologic Reviews 65, page 69.) • Selon une étude récente comparant les données d’enquêtes routières aux données post mortem sur les conducteurs mortellement blessés de la Colombie-Britannique, la consommation de cannabis à elle seule multiplie par 5 le risque de collision mortelle et la combinaison d’alcool et de cannabis le multiplie 40 fois. (Source : D. Beirness et E. Beasley et P. Boase, « A comparison of drug use by fatally-injured drivers and drivers at risk », dans Proceedings of the 20th International Conference on Alcohol, Drugs and Traffic Safety T2013 [Brisbane : The International Council on Alcohol, Drugs and Traffic Safety, 2013], page 4.) Les études estimant le nombre de décès de la route attribuables au cannabis sont troublantes. • Selon une étude, il y aurait eu 75 décès attribuables au cannabis au Canada en 2012. (Source : The Impact of Cannabis on Road Safety in the Canadian Provinces: Estimates of Collisions, Casualties and Costs in 2012. A.Wettlaufer et coll., [Ottawa : Centre canadien de lutte contre l’alcoolisme et les toxicomanies, 2016], page 13.) • Une autre étude estime qu’il y aurait eu entre 89 et 267 décès de la route liés au cannabis au Canada en 2010. (Source : Crude estimates of cannabisattributed mortality and morbidity in Canada – implications for public health focused intervention priorities [2015] B. Fischer et coll., 10 Journal of Public Health 1, page 2.) continued... suite...
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