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Association between road vehicle collisions and recent medical contact in older drivers: a case-crossover study.: Medical contact and road vehicle collisions

Abstract : OBJECTIVE: To estimate the association between past medical contacts and the risk of vehicle collision in a population of older drivers from the province of Quebec, Canada. DESIGN: Case-crossover study. SETTING: Quebec. PARTICIPANTS: 111 699 older drivers involved in at least one vehicle collision between January 1988 and December 2000. MAIN OUTCOME MEASURES: For each driver, the risk of having a vehicle collision while exposed and not exposed to a medical contact was compared. Separate conditional logistic regression analyses were conducted for all drivers and in four diagnostic-specific subgroups. RESULTS: The study found a weak but statistically significant increased risk of all collisions being associated with a medical contact within 1 month before the collision, for all drivers (OR=1.10, 95% CI 1.08 to 1.11) and for drivers with diabetes (OR=1.07, 95% CI 1.03 to 1.11). CONCLUSION: Older drivers who have a collision are more likely to have been in contact with a physician shortly before the collision. These findings suggest that there might be an opportunity to detect medical conditions that put older drivers at higher risk of collision; however, further research is needed to assess the potential effectiveness and practical modalities of screening.
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Submitted on : Monday, May 5, 2008 - 9:12:24 AM
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Sandy Leproust, Emmanuel Lagarde, Samy Suissa, Louis Rachid Salmi. Association between road vehicle collisions and recent medical contact in older drivers: a case-crossover study.: Medical contact and road vehicle collisions. Injury Prevention, BMJ Publishing Group, 2007, 13 (6), pp.382-7. ⟨10.1136/ip.2007.016477⟩. ⟨inserm-00168649⟩

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