{"id":22939,"date":"2025-11-25T16:12:36","date_gmt":"2025-11-25T21:12:36","guid":{"rendered":"https:\/\/www.ices.on.ca\/?post_type=journal_article&#038;p=22939"},"modified":"2025-12-01T16:17:35","modified_gmt":"2025-12-01T21:17:35","slug":"covid-19-immunisation-among-individuals-with-opioid-use-disorder-in-ontario","status":"publish","type":"journal_article","link":"https:\/\/www.ices.on.ca\/fr\/publications\/journal-articles\/covid-19-immunisation-among-individuals-with-opioid-use-disorder-in-ontario\/","title":{"rendered":"COVID-19 immunisation among individuals with opioid use disorder in Ontario: a population-based cohort study"},"content":{"rendered":"<p><strong>Background<\/strong> \u2014 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.<\/p>\n<p><strong>Methods<\/strong> \u2014 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 &gt;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.<\/p>\n<p><strong>Results<\/strong> \u2014 The cohort included 105\u2009733 individuals with OUD and 1\u2009185\u2009993 without OUD. Individuals with OUD had a lower hazard of receiving two vaccine doses (aHR: 0.75, 95%\u2009CI 0.73 to 0.76) and three or more doses (aHR: 0.69, 95%\u2009CI 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).<\/p>\n<p><strong>Conclusion<\/strong> \u2014 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.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Background \u2014 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 \u2014 This population-based retrospective cohort study used linked administrative [&hellip;]<\/p>\n","protected":false},"template":"","migration-helper-automated":[],"migration-manual":[],"topic":[20,34,35],"migration-helper-qa-sample-set":[],"class_list":["post-22939","journal_article","type-journal_article","status-publish","hentry","topic-health-and-health-care-inequality","topic-mental-health-and-addictions","topic-public-health"],"acf":{"citation":"Hanna M, Subic AM, Park AL, Wu F, Campbell DM, Leece P, Morrison L, Parsons J, Sellen K, Strike C, Gomes T, Orkin AM. <em>BMJ Public Health<\/em>. 2025; 3(2): e002755.","source_url":"https:\/\/doi.org\/10.1136\/bmjph-2025-002755","ices_scientist":[1252],"site":[6733],"research_program":[6746],"news_release":"","journal_article":"","atlas":"","research_report":"","infographic":"","video":"","downloads":null,"links":null,"sitecore_item_id":"","sitecore_item_name":"","sitecore_field_values":"","previous_url":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ICES | COVID-19 immunisation among individuals with opioid use disorder in Ontario: a population-based cohort study<\/title>\n<meta name=\"description\" content=\"Background \u2014 The COVID-19 pandemic exacerbated health inequities, particularly among individuals with opioid use disorder (OUD). Disparities in vaccine\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ices.on.ca\/fr\/publications\/journal-articles\/covid-19-immunisation-among-individuals-with-opioid-use-disorder-in-ontario\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ICES | COVID-19 immunisation among individuals with opioid use disorder in Ontario: a population-based cohort study\" \/>\n<meta property=\"og:description\" content=\"Background \u2014 The COVID-19 pandemic exacerbated health inequities, particularly among individuals with opioid use disorder (OUD). 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