{"id":23413,"date":"2026-03-19T11:30:14","date_gmt":"2026-03-19T15:30:14","guid":{"rendered":"https:\/\/www.ices.on.ca\/?post_type=journal_article&p=23413"},"modified":"2026-03-19T11:30:15","modified_gmt":"2026-03-19T15:30:15","slug":"mammographic-screening-and-time-to-breast-cancer-diagnosis-among-immigrants-and-long-term-residents-in-ontario","status":"publish","type":"journal_article","link":"https:\/\/www.ices.on.ca\/fr\/publications\/journal-articles\/mammographic-screening-and-time-to-breast-cancer-diagnosis-among-immigrants-and-long-term-residents-in-ontario\/","title":{"rendered":"Mammographic screening and time to breast cancer diagnosis among immigrants and long-term residents in Ontario"},"content":{"rendered":"

Background<\/strong> \u2014 Biennial breast screening enables timely diagnosis, a critical determinant of survival. However, this benefit depends on navigating complex healthcare systems where immigrant women often encounter barriers. We posed the question of whether immigrant women in Ontario experience a \u201cdouble burden\u201d of lower screening adherence and prolonged intervals between clinical presentation and confirmed diagnosis compared to long-term residents.<\/p>\n

Methods<\/strong> \u2014 We identified women aged 50\u201374 eligible for breast screening in provincial administrative databases. We calculated the proportion up-to-date with biennial mammography annually (2012\u20132020) and modelled the incidence rate ratio (IRR) using negative binomial regression, adjusting for age, marginalization, and morbidity. Additionally, we identified women with a first breast cancer diagnosis and matched each immigrant 1:2 to long-term residents by age, stage, and year of diagnosis. The time from first clinical presentation to diagnosis was analyzed using adjusted linear regression and conditional logistic regression.<\/p>\n

Results<\/strong> \u2014 On January 1, 2020, 59.9% of long-term residents were up-to-date with screening compared to 51.4% of immigrants (adjusted IRR 0.74; 95% CI 0.71\u20130.78). The adjusted mean time to diagnosis was 1.21 days longer for immigrants (95% CI 0.10\u20132.32), a clinically negligible difference. However, diagnostic delays were systemic: 25% of all women waited\u2009\u2265\u200960 days, and 10% waited\u2009\u2265\u2009135 days, with no significant difference between groups. Immigrants were more likely to be diagnosed at Stage 2 or 3 compared to long-term residents (51.7% vs. 46.6%, p\u2009<\u20090.001).<\/p>\n

Conclusion<\/strong> \u2014 Comprehensive process mapping of screening and diagnostic processes is required involving representatives of all stakeholders and all subpopulations eligible for breast screening, in order to conduct and implement knowledge-based revisions of screening and BC diagnosis service delivery in Ontario, improve the uptake of screening and the BC stage distribution among immigrant women, and reduce lengthy diagnostic delays.<\/p>\n","protected":false},"excerpt":{"rendered":"

Background \u2014 Biennial breast screening enables timely diagnosis, a critical determinant of survival. However, this benefit depends on navigating complex healthcare systems where immigrant women often encounter barriers. We posed the question of whether immigrant women in Ontario experience a \u201cdouble burden\u201d of lower screening adherence and prolonged intervals between clinical presentation and confirmed diagnosis […]<\/p>\n","protected":false},"template":"","migration-helper-automated":[],"migration-manual":[],"topic":[38,20,35,18],"migration-helper-qa-sample-set":[],"class_list":["post-23413","journal_article","type-journal_article","status-publish","hentry","topic-cancer-and-cancer-screening","topic-health-and-health-care-inequality","topic-public-health","topic-racialized-communities"],"acf":{"citation":"Fatiregun OA, Sutradhar R, Podolsky S, Eisen A, Paszat L, Rakovitch E. BMC Cancer<\/em>. 2026; Mar 19 [Epub ahead of print].","source_url":"https:\/\/doi.org\/10.1186\/s12885-026-15693-0","ices_scientist":[1370,1099,1341],"site":[6733],"research_program":[6741],"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":"\nICES | Mammographic screening and time to breast cancer diagnosis among immigrants and long-term residents in Ontario<\/title>\n<meta name=\"description\" content=\"Background \u2014 Biennial breast screening enables timely diagnosis, a critical determinant of survival. 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