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Twin birth rates and obstetric interventions in Iceland : A nationwide study from 1997 to 2018

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dc.contributor University of Iceland
dc.contributor.author Ontiveros, Jamie Lynn
dc.contributor.author Gunnarsdóttir, Jóhanna
dc.contributor.author Guðnadóttir, Sigurbjörg Anna
dc.contributor.author Aspelund, Thor
dc.contributor.author Einarsdóttir, Kristjana
dc.date.accessioned 2023-05-10T01:03:53Z
dc.date.available 2023-05-10T01:03:53Z
dc.date.issued 2023-10
dc.identifier.citation Ontiveros , J L , Gunnarsdóttir , J , Guðnadóttir , S A , Aspelund , T & Einarsdóttir , K 2023 , ' Twin birth rates and obstetric interventions in Iceland : A nationwide study from 1997 to 2018 ' , International Journal of Gynecology and Obstetrics , vol. 163 , no. 1 , pp. 226-233 . https://doi.org/10.1002/ijgo.14817
dc.identifier.issn 0020-7292
dc.identifier.other PURE: 130705558
dc.identifier.other PURE UUID: 5324b995-e25d-4b4f-85fe-6e54a86e55ca
dc.identifier.other unpaywall: 10.1002/ijgo.14817
dc.identifier.other Scopus: 85158055844
dc.identifier.uri https://hdl.handle.net/20.500.11815/4202
dc.description Funding Information: We thank the Icelandic Directorate of Health for providing the data. Publisher Copyright: © 2023 The Authors. International Journal of Gynecology & Obstetrics published by John Wiley & Sons Ltd on behalf of International Federation of Gynecology and Obstetrics.
dc.description.abstract OBJECTIVE: Twin pregnancies are associated with increased antepartum and intrapartum risks. Limited multiple embryo transfers are associated with decreased twin birth rates. We aimed to study the effect of 2009 Icelandic regulations on twin birth rates and examine obstetric intervention rates for twin births during the study period. METHODS: The study included all births (N = 94 028) in Iceland during 1997-2018. Twin birth rates and obstetric intervention rates were compared over birth year periods using modified Poisson regression adjusted for confounders. RESULTS: An observed decrease in the twin birth rate trend was most notable from 2006 until 2009. Twin birth decreased in 2009-2013 (prevalence ratio [PR] 0.74, 95% confidence interval [CI] 0.64-0.86) and in 2014-2018 (PR 0.74, 95% CI 0.64-0.86) compared with 1997-2002. This decrease was only evident for women aged 30+ years in stratified analysis. Induction of labor rates increased from 26% in 1997-2002 to 44% in 2014-2018 (adjusted rate ratio [ARR] 2.10, 95% CI 1.72-2.57) whereas elective cesarean section (ARR 0.80, 95% CI 0.59-1.07) and urgent cesarean section (ARR 0.79, 95% CI 0.63-1.00) rates appeared to decline. CONCLUSION: Twin births decreased during the study period. International guidelines published before the Icelandic regulations may have affected twin birth rates in Iceland. Induction of labor rates for twins increased while cesarean section rates decreased.
dc.format.extent 8
dc.format.extent 226-233
dc.language.iso en
dc.relation.ispartofseries International Journal of Gynecology and Obstetrics; 163(1)
dc.rights info:eu-repo/semantics/openAccess
dc.subject Fæðinga- og kvensjúkdómafræði
dc.subject assisted reproduction
dc.subject cesarean
dc.subject delivery
dc.subject induction of labor
dc.subject twin pregnancy
dc.subject Parturition
dc.subject Humans
dc.subject Pregnancy, Twin
dc.subject Pregnancy
dc.subject Cesarean Section
dc.subject Labor, Obstetric
dc.subject Female
dc.subject Birth Rate
dc.subject Iceland/epidemiology
dc.subject Retrospective Studies
dc.subject Obstetrics and Gynecology
dc.title Twin birth rates and obstetric interventions in Iceland : A nationwide study from 1997 to 2018
dc.type /dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article
dc.description.version Peer reviewed
dc.identifier.pmid 37128945
dc.identifier.doi https://doi.org/10.1002/ijgo.14817
dc.relation.url http://www.scopus.com/inward/record.url?scp=85158055844&partnerID=8YFLogxK
dc.contributor.department Interdisciplinary Graduate Studies
dc.contributor.department Faculty of Medicine
dc.contributor.department Other departments

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