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dc.contributor.authorSørbye, I.K.
dc.contributor.authorBains, Sukhjeet
dc.contributor.authorVangen, Siri
dc.contributor.authorSundby, Johanne Sommerschild
dc.contributor.authorLindskog, Benedikte V
dc.contributor.authorOwe, Katrine Mari
dc.identifier.citationBJOG: An International Journal of Obstetrics and Gynaecology. 2021, 129 (3), 423-431.en_US
dc.description.abstractObjective: To estimate the association between maternal origin and obstetric anal sphincter injury (OASI), and assess if associations differed by length of residence. Design: Population-based cohort study. Setting: The Medical Birth Registry of Norway. Population: Primiparous women with vaginal livebirth of a singleton cephalic fetus between 2008 and 2017 (n = 188 658). Methods: Multivariable logistic regression models estimated adjusted odds ratios (aORs) for OASI with 95% CI by maternal region of origin and birthplace. We stratified models on length of residence and paternal birthplace. Main outcome measures: OASI. Results: Overall, 6373 cases of OASI were identified (3.4% of total cohort). Women from South Asia were most likely to experience OASI (6.2%; aOR 2.24, 95% CI 1.87–2.69), followed by those from Southeast Asia, East Asia & the Pacific (5.7%; 1.59, 1.37–1.83) and Sub-Saharan Africa (5.2%; 1.85, 1.55–2.20), compared with women originating from Norway. Among women born in the same region, those with short length of residence in Norway (0–4 years), showed the highest odds of OASI. Migrant women across most regions of origin had the lowest risk of OASI if they had a Norwegian partner. Conclusions: Primiparous women from Asian regions and Sub-Saharan Africa had up to two-fold risk of OASI, compared with women originating from Norway. Migrants with short residence and those with a foreign-born partner had higher risk of OASI, implying that some of the risk differential is due to sociocultural factors. Some migrants, especially new arrivals, may benefit from special attention during labour to reduce morbidity and achieve equitable outcomes.en_US
dc.description.sponsorshipThis work is part of the MiPreg study and was supported by a PhD grant from the Norwegian Research Council, grant no. 273328/2018. The funders played no role in data analyses, interpretation of findings or the decision to submit the manuscript for publication.en_US
dc.relation.ispartofseriesBJOG: An International Journal of Obstetrics and Gynaecology;Volume 129, Issue 3
dc.rightsNavngivelse-Ikkekommersiell 4.0 Internasjonal*
dc.subjectLength of residenceen_US
dc.subjectMaternal birthplacesen_US
dc.subjectObstetric anal sphincter injuriesen_US
dc.subjectMaternal originsen_US
dc.titleObstetric anal sphincter injury by maternal origin and length of residence: a nationwide cohort studyen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© 2021 The Authorsen_US
dc.source.journalBJOG: An International Journal of Obstetrics and Gynaecologyen_US
dc.relation.projectNorges forskningsråd: 273328/2018en_US

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Navngivelse-Ikkekommersiell 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse-Ikkekommersiell 4.0 Internasjonal