Date of Award


Degree Type


Degree Name

Master of Science


Epidemiology and Biostatistics


Dr. Evelyn Vingilis

Second Advisor

Dr. Robert Mann

Third Advisor

Dr. Mark Speechley


Studies have demonstrated the relationships between motor vehicle collisions and anxiety and/or mood disorders, antidepressant and anxiolytic medication use, drinking and driving, and road rage. It is unclear if symptoms of anxiety and/or mood disorders are directly associated with motor vehicle collisions or if other factors mediate the effect. This thesis examines the effects of psychiatric distress, medication use, drinking and driving, and road rage on motor vehicle collisions. Cross-sectional data from the Centre for Addiction and Mental Health Monitor were used in a hierarchical logistic regression analysis. Demographic predictors, psychiatric distress, and mediating variables were entered in blocks into five models. Findings indicated the relationship between psychiatric distress and motor vehicle collisions was not mediated by antidepressant and/or anxiolytics; however, it was mediated by drinking driving and road rage. The cross-sectional data make the causal nature of these relationships unclear and further research is needed.



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