Lifetime overdose and overdose in the past year are different outcomes with different exposure relationships.
What the supplied research shows
Rapid assessments in eight Massachusetts communities analyzed 469 participants recruited through nonprobability methods. Benzodiazepine use was associated with higher odds of a past-year nonfatal opioid overdose after adjustment. Other associations varied between lifetime and recent overdose models. The sample had a high burden of reported overdose and recent heroin or fentanyl use.
What it cannot establish
These were survey associations in selected communities, not randomized exposures or a representative estimate for all people who use drugs. Current substance use may not describe what was taken at a historical overdose, and self-report and residual confounding remain relevant.
Forensic interpretation and case review
When using this paper in a report, state the time window, recruitment method and outcome definition. Do not convert a past-year association into proof that benzodiazepines were present during a particular event. Obtain contemporaneous toxicology, treatment observations and exposure history. The study supports prevention questions about co-use while requiring case-specific evidence for mechanism and causation. Its prevalence estimates should not be presented as the rate in the general population.
Source and related reading
Source: supplied full-text paper, PMC8404353. Findings are paraphrased; the forensic discussion is an interpretation of the evidence.
Related: Opioid Co-Use Changed the Mortality Comparison for Benzodiazepine Hypnotics in Older Adults.
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