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Adults Diagnosed with Concussion Face Elevated Risk of a Traffic Crash

Adults with concussions face a 50% higher risk of serious traffic crashes, especially in the first four weeks, with risks rising further after repeated concussions, study finds.

  • On November 6, researchers at ICES and Sunnybrook Research Institute reported adults diagnosed with a concussion may be at about 50% higher risk of a subsequent traffic crash in a BMJ Open study.
  • Concussion symptoms such as insomnia and slowed reaction times can impair driving skills, with the risk highest during the first four weeks after a concussion.
  • Of the 425,158 adults in the cohort, one in 13 patients were injured in a subsequent traffic crash, resulting in 1,633 ambulance calls, 59,978 hospital days, and $835 million in medical costs.
  • Clinicians should warn patients recovering from concussion to treat symptoms and avoid risky trips during the first month, as Dr. Donald Redelmeier urged caution, saying it's "transformative".
  • Despite the large cohort, the study noted limitations including the causality caveat and lack of concussion severity data, while traffic risk also affected pedestrians crossing the street.
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Concussions Increase Traffic Crash Risk For Weeks After

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Medical Xpress broke the news in on Thursday, November 6, 2025.
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