Research Letter

One-Year Mortality Among Opioid Overdose Survivors

JAMA 10.1001/jama.2026.6469

May 07, 2026 at 11:00 AM EDT

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This study uses Canadian administrative data to evaluate 1-year mortality among opioid overdose survivors in Ontario, Canada, and characterize postoverdose mortality risk after the widespread availability of fentanyl.

Corresponding Author: Robert A. Kleinman, MD, MSc, Centre for Addiction and Mental Health, 100 Stokes St, 3rd Floor, Toronto, ON M6J 1H4, Canada (robert.kleinman@camh.ca).

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