Perception and Correlates of Opioid Overdose Risk Among Overdose Survivors Who Use Nonprescribed Opioids in San Francisco and Boston.

Background: Understanding opioid overdose risk perception may inform overdose prevention strategies.

Methods: We used baseline data from a randomized overdose prevention trial, in San Francisco, CA, and Boston, MA, among people who used nonprescribed opioids, survived an overdose in the past 3 years, and had received naloxone. Participants were asked how likely they were to overdose in the next 4 months.

Feasibility and acceptability of a timeline follow-back method to assess opioid use, non-fatal overdose, and substance use disorder treatment.

Background: Non-fatal overdoses are underreported and there is no accepted and feasible self-report research measure of non-fatal opioid overdose. Timeline follow-back (TLFB) calendar-based questionnaires assess self-reported risk behaviors. We assessed feasibility and acceptability of a new TLFB research measure for opioid use, non-fatal opioid overdose, and substance use disorder treatment among opioid overdose survivors.