{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,17]],"date-time":"2026-03-17T18:48:27Z","timestamp":1773773307951,"version":"3.50.1"},"reference-count":30,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2021,1,23]],"date-time":"2021-01-23T00:00:00Z","timestamp":1611360000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Obstet Gynecol Scand"],"published-print":{"date-parts":[[2021,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Introduction<\/jats:title><jats:p>Placental abruption is a serious complication in pregnancy. Its incidence varies across countries, but the information of how placental abruption varies in immigrant populations is limited. The aims of this study were to estimate the incidence of placental abruption in immigrant women compared with non\u2010immigrants by maternal country and region of birth, reason for immigration, and length of residence.<\/jats:p><\/jats:sec><jats:sec><jats:title>Material and methods<\/jats:title><jats:p>We conducted a nationwide population\u2010based study using data from the Medical Birth Registry of Norway and Statistics Norway (1990\u20102016). The study sample included 1\u00a0558\u00a0174 pregnancies, in which immigrant women accounted for 245\u00a0887 pregnancies and 1\u00a0312\u00a0287 pregnancies were to non\u2010immigrants. Crude and adjusted odds ratios with 95% CI for placental abruption in immigrant women compared with non\u2010immigrants were estimated by logistic regression with robust standard error estimations (accounting for within\u2010mother clustering). Adjustment variables included year of birth, maternal age, parity, multiple pregnancies, chronic hypertension, and level of education.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The incidence of placental abruption decreased during the study period for both immigrants (from 0.68% to 0.44%) and non\u2010immigrants (from 0.80% to 0.34%). Immigrant women from sub\u2010Saharan Africa had an adjusted odds ratio of 1.35 (95% CI 1.15\u20101.58) compared with non\u2010immigrants for placental abruption, whereas immigrant women from Ethiopia had an adjusted odds ratio of 2.39 (95% CI 1.67\u20103.41). We found a small variation in placental abruption incidence by other countries or regions of birth, length of residence, and reason for immigration.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Immigrant women from sub\u2010Saharan Africa, especially Ethiopia, have increased odds for placental abruption when giving birth in Norway. Reason for immigration and length of residence had little impact on the incidence of placental abruption.<\/jats:p><\/jats:sec>","DOI":"10.1111\/aogs.14067","type":"journal-article","created":{"date-parts":[[2020,12,20]],"date-time":"2020-12-20T16:24:44Z","timestamp":1608481484000},"page":"658-665","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Placental abruption in immigrant women in Norway: A population\u2010based study"],"prefix":"10.1111","volume":"100","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2338-5447","authenticated-orcid":false,"given":"Karolina S.","family":"M\u00e6land","sequence":"first","affiliation":[{"name":"Faculty of Health and Social Sciences Western Norway University of Applied Sciences Bergen Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8256-0778","authenticated-orcid":false,"given":"Nils\u2010Halvdan","family":"Morken","sequence":"additional","affiliation":[{"name":"Department of Clinical Science University of Bergen Bergen Norway"},{"name":"Center for Fertility and Health Norwegian Institute of Public Health Oslo Norway"},{"name":"Department of Obstetrics and Gynecology Haukeland University Hospital Bergen Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6018-9082","authenticated-orcid":false,"given":"Erica","family":"Schytt","sequence":"additional","affiliation":[{"name":"Faculty of Health and Social Sciences Western Norway University of Applied Sciences Bergen Norway"},{"name":"Center for Clinical Research Dalarna Uppsala University Uppsala Sweden"},{"name":"Department of Women\u2019s and Children\u2019s Health Karolinska Institute Solna Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5655-3198","authenticated-orcid":false,"given":"Vigdis","family":"Aasheim","sequence":"additional","affiliation":[{"name":"Faculty of Health and Social Sciences Western Norway University of Applied Sciences Bergen Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6340-4593","authenticated-orcid":false,"given":"Roy M.","family":"Nilsen","sequence":"additional","affiliation":[{"name":"Faculty of Health and Social Sciences Western Norway University of Applied Sciences Bergen Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,1,23]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0125246"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0412.2010.01030.x"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1093\/aje\/kwm073"},{"key":"e_1_2_11_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.2008.02064.x"},{"key":"e_1_2_11_6_1","unstructured":"BevelanderPH BildeR DahlstedtI et al.Scandinavia's Population Groups Originating from Developing Countries: Change and Integration. 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