{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,12]],"date-time":"2026-09-12T05:55:16Z","timestamp":1789192516870,"version":"build-2803163510"},"reference-count":36,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2024,12,11]],"date-time":"2024-12-11T00:00:00Z","timestamp":1733875200000},"content-version":"vor","delay-in-days":10,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100005627","name":"Thrasher Research Fund","doi-asserted-by":"publisher","award":["01596"],"award-info":[{"award-number":["01596"]}],"id":[{"id":"10.13039\/100005627","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000027","name":"National Institute on Alcohol Abuse and Alcoholism","doi-asserted-by":"publisher","award":["K01 AA027811"],"award-info":[{"award-number":["K01 AA027811"]}],"id":[{"id":"10.13039\/100000027","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Pharmacoepidemiology and Drug"],"published-print":{"date-parts":[[2024,12]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>Administrative data sources are used to describe the epidemiology of chronic hypertension in pregnancy and its consequences. Differences in identification across sources may affect research estimates. We compared identification of chronic hypertension in birth certificate records, hospital discharge records, and Medi\u2010Cal claims in the same individuals.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We used data from 820\u2009140 2016\u20132020 California Medi\u2010Cal covered births. We identified chronic hypertension on birth certificates using the prepregnancy hypertension check box and in hospital discharge records and Medi\u2010Cal claims using ICD codes. We compared the prevalence of chronic hypertension and identified predictors of agreement. We also compared absolute and relative estimates of racial\/ethnic disparities in chronic hypertension and associations with neonatal outcomes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The prevalence of chronic hypertension was 0.7% in birth records, 2.1% in hospital discharge records, and 3.9% in Medi\u2010Cal claims. There was low to fair agreement between birth certificate records and hospitalization records (kappa\u2009=\u20090.36) and Medi\u2010Cal claims (kappa\u2009=\u20090.25). Characteristics associated with the worst agreement were eligibility for Women Infant and Children benefits, US\u2010born, and normal body mass index. Estimates of the relative risk for racial\/ethnic disparities and associations with preterm birth and SGA age at delivery were similar across sources. Estimates of risk differences were larger in hospitalization and Medi\u2010Cal claims data.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Reliance on birth certificate data may contribute to underestimated prevalence estimates and biased causal estimates. Epidemiologic research and public health surveillance of chronic hypertension and its consequences should incorporate data from multiple data sources to improve validity of estimates.<\/jats:p><\/jats:sec>","DOI":"10.1002\/pds.70059","type":"journal-article","created":{"date-parts":[[2024,12,12]],"date-time":"2024-12-12T01:33:14Z","timestamp":1733967194000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Identification of Chronic Hypertension in Pregnancy in Three Administrative Data Sources Among Medicaid\u2010Funded Births in California"],"prefix":"10.1002","volume":"33","author":[{"given":"Erin","family":"Delker","sequence":"first","affiliation":[{"name":"Department of Pediatrics University of California San Diego  San Diego California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rebecca J.","family":"Baer","sequence":"additional","affiliation":[{"name":"Department of Pediatrics University of California San Diego  San Diego California USA"},{"name":"California Preterm Birth Initiative University of California San Francisco  San Francisco California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christina D.","family":"Chambers","sequence":"additional","affiliation":[{"name":"Department of Pediatrics University of California San Diego  San Diego California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gretchen","family":"Bandoli","sequence":"additional","affiliation":[{"name":"Department of Pediatrics University of California San Diego  San Diego California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,12,11]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0000000000003020"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1161\/HYPERTENSIONAHA.119.12968"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2011.10.878"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10995\u2010022\u201003531\u20101"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1001\/jamanetworkopen.2020.18741"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jacc.2020.09.601"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.15585\/mmwr.mm7117a1"},{"issue":"12","key":"e_1_2_9_9_1","first-page":"782","article-title":"Managing Chronic Hypertension in Pregnant Women","volume":"100","author":"Croke L.","year":"2019","journal-title":"ACOG Releases Updated Practice Bulletin. 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