{"id":21926,"date":"2025-06-09T16:59:29","date_gmt":"2025-06-09T20:59:29","guid":{"rendered":"https:\/\/www.ices.on.ca\/?post_type=journal_article&#038;p=21926"},"modified":"2025-06-25T09:48:13","modified_gmt":"2025-06-25T13:48:13","slug":"use-of-health-administrative-data-to-identify-migraine-in-individuals-with-a-recognized-pregnancy","status":"publish","type":"journal_article","link":"https:\/\/www.ices.on.ca\/fr\/publications\/journal-articles\/use-of-health-administrative-data-to-identify-migraine-in-individuals-with-a-recognized-pregnancy\/","title":{"rendered":"Use of health administrative data to identify migraine in individuals with a recognized pregnancy: a validation study in Ontario, Canada"},"content":{"rendered":"<p><strong>Background<\/strong> \u2014\u00a0Migraine is a common risk factor for adverse perinatal outcomes, showing the importance of studying migraine in pregnancy. Despite growing use of routinely collected administrative data in health research, the validity of such data to detect migraine in pregnant populations is unestablished. We validated algorithms to identify a history of migraine among pregnant individuals using health administrative data and population-representative self-report data.<\/p>\n<p><strong>Methods<\/strong> \u2014\u00a0We included n=8824 females in Ontario, Canada with a documented pregnancy with an estimated conception date from 09\/01\/2005 to 12\/31\/2021 who completed the Canadian Community Health Survey (CCHS) within 5 years before conception. We created algorithms using different combinations of diagnostic codes for headache disorders and migraine-specific drug claims with varying lookback periods before conception. We compared their performance to self-reported migraine diagnosis from the CCHS. Measures of validity were sensitivity, specificity, predictive values, and agreement.<\/p>\n<p><strong>Results<\/strong> \u2014\u00a0The prevalence of self-reported migraine from the CCHS was 18% (95%CI 16%-19%). The prevalence using administrative data depended on the definition (range: 2%-25%). All algorithms had high specificity (81.7-98.9%), while sensitivity varied (6.1-53.2%). The algorithm requiring \u22652 physician visits or \u22651 hospitalizations or emergency department visits with diagnostic codes ICD-9: 346\/ICD-10: G43, with a lifetime lookback, had high specificity (94.0%; 95%CI 93.1%-94.8%) and negative predictive value (86.3%; 95%CI 85.0%-87.6%) and modest sensitivity (30.4%; 95%CI 27.3%-33.6%) and positive predictive value (51.9%; 95%CI 46.8%-57.0%). Agreement was fair (\u03ba = 0.29; 95%CI 0.25-0.33).<\/p>\n<p><strong>Conclusion<\/strong> \u2014\u00a0Longitudinally linked health administrative data are effective at identifying pregnant individuals with migraine, with high specificity and reasonable sensitivity.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Background \u2014\u00a0Migraine is a common risk factor for adverse perinatal outcomes, showing the importance of studying migraine in pregnancy. Despite growing use of routinely collected administrative data in health research, the validity of such data to detect migraine in pregnant populations is unestablished. We validated algorithms to identify a history of migraine among pregnant individuals [&hellip;]<\/p>\n","protected":false},"template":"","migration-helper-automated":[],"migration-manual":[],"topic":[41,26,58],"migration-helper-qa-sample-set":[],"class_list":["post-21926","journal_article","type-journal_article","status-publish","hentry","topic-brain-diseases","topic-maternity-and-neonatal-care","topic-research-and-methods"],"acf":{"citation":"Albanese CM, Bondy SJ, Lay C, Li Z, Guan J, Brown HK. <em>Epidemiology<\/em>. 2025; Jun 9 [Epub ahead of print].","source_url":"https:\/\/doi.org\/10.1097\/ede.0000000000001890","ices_scientist":[1179,1164],"site":[6733],"research_program":[6740],"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 v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ICES | Use of health administrative data to identify migraine in individuals with a recognized pregnancy: a validation study in Ontario, Canada<\/title>\n<meta name=\"description\" content=\"Background \u2014\u00a0Migraine is a common risk factor for adverse perinatal outcomes, showing the importance of studying migraine in pregnancy. Despite growing\" \/>\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\/use-of-health-administrative-data-to-identify-migraine-in-individuals-with-a-recognized-pregnancy\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ICES | Use of health administrative data to identify migraine in individuals with a recognized pregnancy: a validation study in Ontario, Canada\" \/>\n<meta property=\"og:description\" content=\"Background \u2014\u00a0Migraine is a common risk factor for adverse perinatal outcomes, showing the importance of studying migraine in pregnancy. 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