Original Investigation

Prior Concussions and Risk of Disability for Patients After a Motor Vehicle Crash

JAMA Network Open 10.1001/jamanetworkopen.2025.54831

January 21, 2026 at 11:00 AM EST

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Is a prior concussion associated with an increased risk of long-term disability following a motor vehicle crash?In this cohort study of 907 984 adult patients, a prior concussion was associated with a 15% increased risk of long-term disability.This finding suggests the importance of counseling patients about the risks of motor vehicle crashes and previous concussions, as well as the importance of follow-up care to reduce the risk of subsequent disability.

Corresponding Author: Donald A. Redelmeier, MD, FRCPC, MSHSR, FACP, Sunnybrook Health Sciences Centre, V-151, 2075 Bayview Ave, Toronto, ON M4N 3M5, Canada (dar@ices.on.ca).

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