{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T13:46:38Z","timestamp":1792244798565,"version":"4.4.0"},"reference-count":35,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2024,2,21]],"date-time":"2024-02-21T00:00:00Z","timestamp":1708473600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/100008723","name":"Suomen L\u00e4\u00e4ketieteen S\u00e4\u00e4ti\u00f6","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100008723","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100005416","name":"Norges Forskningsr\u00e5d","doi-asserted-by":"publisher","award":["320181"],"award-info":[{"award-number":["320181"]}],"id":[{"id":"10.13039\/501100005416","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Obstet Gynecol Scand"],"published-print":{"date-parts":[[2024,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Introduction<\/jats:title><jats:p>The Coronavirus 2019 Disease (COVID\u201019) pandemic reached the Nordic countries in March 2020. Public health interventions to limit viral transmission varied across different countries both in timing and in magnitude. Interventions indicated by an Oxford Stringency Index \u226550 were implemented early (March 13\u201317, 2020) in Denmark, Finland, Norway and Iceland, and on March 26, 2020 in Sweden. The aim of the current study was to assess the incidence of COVID\u201019\u2010related admissions of pregnant women in the Nordic countries in relation to the different national public health strategies during the first year of the pandemic.<\/jats:p><\/jats:sec><jats:sec><jats:title>Material and methods<\/jats:title><jats:p>This is a meta\u2010analysis of population\u2010based cohort studies in the five Nordic countries with national or regional surveillance in the Nordic Obstetric Surveillance System (NOSS) collaboration: national data from Denmark, Finland, Iceland and Norway, and regional data covering 31% of births in Sweden. The source population consisted of women giving birth in the included areas March 1\u2013December 31, 2020. Pregnant women with a positive SARS\u2010CoV\u20102 PCR test \u226414\u2009days before hospital admission were included, and admissions were stratified as either COVID\u201019\u2010related or non\u2010COVID (other obstetric healthcare). Information about public health policies was retrieved retrospectively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>In total, 392\u2009382 maternities were considered. Of these, 600 women were diagnosed with SARS\u2010CoV\u20102 infection and 137 (22.8%) were admitted for COVID\u201019 symptoms. The pooled incidence of COVID\u201019 admissions per 1000 maternities was 0.5 (95% confidence interval [CI] 0.2 to 1.2, <jats:italic>I<\/jats:italic><jats:sup>2<\/jats:sup>\u2009=\u200977.6, tau<jats:sup>2<\/jats:sup>\u2009=\u20090.68, <jats:italic>P<\/jats:italic>\u2009=\u20090.0), ranging from no admissions in Iceland to 1.9 admissions in the Swedish regions. Interventions to restrict viral transmission were less stringent in Sweden than in the other Nordic countries.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>There was a clear variation in pregnant women's risk of COVID\u201019 admission across countries with similar healthcare systems but different public health interventions to limit viral transmission. The meta\u2010analysis indicates that early suppression policies protected pregnant women from severe COVID\u201019 disease prior to the availability of individual protection with vaccines.<\/jats:p><\/jats:sec>","DOI":"10.1111\/aogs.14808","type":"journal-article","created":{"date-parts":[[2024,2,22]],"date-time":"2024-02-22T00:15:19Z","timestamp":1708560919000},"page":"1063-1072","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Early suppression policies protected pregnant women from <scp>COVID<\/scp>\u201019 in 2020: A population\u2010based surveillance from the Nordic countries"],"prefix":"10.1111","volume":"103","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4827-4655","authenticated-orcid":false,"given":"Reetta","family":"Varpula","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology Helsinki University Hospital and Helsinki University  Helsinki Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2423-611X","authenticated-orcid":false,"given":"Outi","family":"\u00c4yr\u00e4s","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Helsinki University Hospital and Helsinki University  Helsinki Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4754-506X","authenticated-orcid":false,"given":"Anna J. M.","family":"Aabakke","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Copenhagen University Hospital\u2010Holb\u00e6k  Holb\u00e6k Denmark"},{"name":"Department of Clinical Medicine University of Copenhagen  Copenhagen Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kari","family":"Klungs\u00f8yr","sequence":"additional","affiliation":[{"name":"Department of Global Public Health and Primary Care University of Bergen  Bergen Norway"},{"name":"Department for Health Promotion Norwegian Institute of Public Health  Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1947-679X","authenticated-orcid":false,"given":"Teresia","family":"Svanvik","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Sahlgrenska University Hospital  Gothenburg 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