7/20/2023 0 Comments Kevin simmons canada worst driverThis meta-analysis indicates that cannabis, like alcohol, impairs driving, and the combination of the two drugs is more detrimental to driving performance than either in isolation.Īdd1577-Appendix A Inclusion Criteria.docxWord 2007 documentĪdd1577-Appendix B Search Strategy.docxWord 2007 documentĪdd1577-Appendix C Study Quality and Risk of Bias.docxWord 2007 documentĭata S3. A scarcity of data and study heterogeneity limited the interpretation of some measures. Subgroup analyses indicated that the effects of cannabis on driving performance measures were similar to low blood alcohol concentrations. The combination of cannabis and alcohol was associated with greater driving performance decrements than either drug in isolation. ResultsĬannabis alone was associated with impaired lateral control. We reported meta-analyses of effect sizes using Hedges’ g and r. driving simulator, closed-course, on-road) involving cannabis and/or alcohol administration. We extracted data for hazard response time, lateral position variability, lane deviations or excursions, time out of lane, driving speed, driving speed variability, speed violations, time speeding, headway, headway variability and crashes from experimental driving studies (i.e. Of the 616 studies that underwent full-text review, this meta-analysis represents 57 studies and 1725 participants. We systematically searched Academic Search Complete, CINAHL, Embase, Scopus, Google Scholar, MEDLINE, PsycINFO, SPORTDiscus and TRID. Our objectives were to quantify the magnitude of the effect of cannabis and alcohol-alone and in combination-on driving performance and behaviour. While epidemiological meta-analyses of cannabis and alcohol have found associations with an increase in crash risk, convergent evidence from driving performance measures is insufficiently quantitatively characterized. Cannabis and alcohol are frequently detected in fatal and injury motor vehicle crashes.
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