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Short-term neonatal and long-term infant outcome of late-preterm twins: nationwide population-based study

Authors
CHO, G. J.CHO, K. -D.KIM, H. Y.HA, S.OH, M. -J.WON, H. -S.CHUNG, J. H.
Issue Date
Jun-2022
Publisher
John Wiley & Sons Inc.
Keywords
late preterm; long-term; neonatal outcome; short-term; twins
Citation
Ultrasound in Obstetrics and Gynecology, v.59, no.6, pp.763 - 770
Indexed
SCIE
SCOPUS
Journal Title
Ultrasound in Obstetrics and Gynecology
Volume
59
Number
6
Start Page
763
End Page
770
URI
https://scholarworks.korea.ac.kr/kumedicine/handle/2021.sw.kumedicine/61042
DOI
10.1002/uog.24838
ISSN
0960-7692
Abstract
Objectives To evaluate the short- and long-term outcome of late-preterm compared with term birth in twin pregnancy. Methods This retrospective observational cohort study included all women who had a twin delivery between 1 January 2007 and 31 December 2010 recorded in the claims database of the Korea National Health Insurance, with at least one follow-up recorded in the database of the National Health Screening Program for Infants and Children. Outcomes were analyzed at the pregnancy level, with adverse outcome being defined as an adverse outcome in one or both twins, identified by a diagnosis according to the International Classification of Diseases 10th Revision. The primary short-term outcome was composite morbidity, which included any of the following: transient tachypnea, respiratory distress syndrome, necrotizing enterocolitis, intraventricular hemorrhage and bronchopulmonary dysplasia. Long-term adverse outcome included any neurological or neurodevelopmental outcome, defined by prespecified neurological and developmental diagnoses; these were assessed by following up all neonates until the end of 2018, by which time they were 8–11 years of age. Outcomes were compared between twins delivered late preterm (34 + 0 to 36 + 6 weeks) and those delivered at term (≥ 37 weeks). Results Among 17 189 women who delivered twins at ≥ 34 weeks of gestation during the study period, 5032 (29.27%) women delivered in the late-preterm period. On multivariate analysis, compared with the twins delivered at term, the late-preterm twins had an increased risk for the primary short-term outcome of composite morbidity (adjusted odds ratio (aOR), 2.09; 95% CI, 1.90–2.30), including transient tachypnea (aOR, 1.85; 95% CI, 1.64–2.09), respiratory distress syndrome (aOR, 2.31; 95% CI, 2.04–2.62), necrotizing enterocolitis (aOR, 2.10; 95% CI, 1.20–3.69) and intraventricular hemorrhage (aOR, 2.13; 95% CI, 1.46–3.11). For the long-term outcome, the late-preterm twins also had an increased risk for any neurological or neurodevelopmental outcome (adjusted hazard ratio, 1.14; 95% CI, 1.07–1.21). Conclusions Twins delivered in the late-preterm period have an increased risk for short- and long-term morbidity compared with twins delivered at term. These results should be considered when determining the timing of delivery in uncomplicated twin pregnancy. © 2021 International Society of Ultrasound in Obstetrics and Gynecology.
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Oh, Min Jeong
Guro Hospital (Department of Obstetrics and Gynecology, Guro Hospital)
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