ArticleBMJ public health2025
COVID-19 immunisation among individuals with opioid use disorder in Ontario: a population-based cohort study.
Article in BMJ public health, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
12 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: The COVID-19 pandemic exacerbated health inequities, particularly among individuals with opioid use disorder (OUD). Disparities in vaccine uptake among people with OUD remain poorly understood. This study assessed COVID-19 immunisation rates among individuals with OUD compared with the general population in Ontario, Canada. Methods: This population-based retrospective cohort study used linked administrative health data to compare COVID-19 vaccination rates between individuals diagnosed with OUD and a 10% random sample of individuals without OUD. Ontario residents aged >15 years with continuous healthcare coverage as of the censor date, 16 March 2020, were included. Inverse Probability of Treatment Weighting (IPTW) was applied to balance confounders, and Cox proportional hazards models estimated adjusted HRs (aHRs) for receiving two and three or more vaccine doses. Results: The cohort included 105 733 individuals with OUD and 1 185 993 without OUD. Individuals with OUD had a lower hazard of receiving two vaccine doses (aHR: 0.75, 95% CI 0.73 to 0.76) and three or more doses (aHR: 0.69, 95% CI 0.67 to 0.70). The rate of two-dose and three-dose vaccination was also lower among those with OUD (115.3 vs 149.0 per 100 000 person-years and 44.7 vs 77.5 per 100 000 person-years). Conclusion: Individuals with OUD had lower COVID-19 vaccination rates, suggesting barriers to access and uptake. Addressing these disparities through targeted interventions is crucial for equitable public health responses.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.