0708. tbl. 109. árg. 2023

Postpartum hemorrhage in singleton births in Iceland 2013-2018, incidence proportion and risk factors

Blæðing eftir fæðingu einbura á Íslandi árin 2013–2018, nýgengihlutfall og áhættuþættir

Karen Sól Sævarsdóttir1

Emma M. Swift2,3

Kristjana Einarsdóttir4,5

Jóhanna Gunnarsdóttir4,6

1Faculty of Medicine, University of Iceland, 2Faculty of Nursing and Midwifery, University of Iceland, 3Reykjavik Birth Center, 4Centre of Public Health Sciences, Faculty of Medicine, University of Iceland, 5Curtin School of Population Health, Curtin University, Australia, 6Department of Obstetrics and Gynecology, Landspitali – The National University Hospital of Iceland.

Correspondence: Karen Sól Sævarsdóttir, karensol95@outlook.com

Key words: postpartum hemorrhage, singleton births, obesity, risk factors.

INTRODUCTION: Many countries have reported an increased incidence proportion of postpartum hemorrhage (PPH). The proportion might also have increased at the National University Hospital of Iceland, based on the registration of the ICD-10 code O72. This study aimed to assess the incidence proportion and risk factors for ≥1000 ml PPH in singleton births in Iceland 2013-2018.

METHODS: This population-based cohort study included data from the Icelandic Birth register on 21.110 singleton births in 2013-2018. Incidence proportion of PPH was assessed based on three definitions: PPH >500 ml, PPH ≥1000 ml, and O72. Binomial regression was used to assess both the change in the proportion of ≥1000 ml PPH over time, stratified by maternal BMI, and risk factors for ≥1000 ml PPH.

RESTULTS: There was an inconsistency in the proportion of PPH when defined by blood loss >500 ml and O72. In obese women, PPH ≥1000 ml was more than twice as likely in those delivering in 2018 compared with 2013 (OR 2.23; CI 1.35-3.81). The strongest risk factors were emergency cesarean (OR 2.68; CI 2.22-3.22) and instrumental delivery (OR 2.18; CI 1.80-2.64), but macrosomia, primiparity and BMI ≥30 were also independent risk factors.

CONCLUSION: The incidence proportion of ≥1000 ml PPH has increased among obese women. The detrimental health effects of obesity and the increased prevalence of interventions among these women could explain these results. It is necessary to use registered blood loss in milliliters in the Icelandic Birth Register because of the under-registration of the diagnostic code O72.


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