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Prelabor cesarean delivery and early-onset acute childhood leukemia risk.
Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Women's and Children's Health. (Reproduktiv hälsa/Sundström Poromaa)ORCID iD: 0000-0002-4935-7532
Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine.
First Department of Pediatrics, ‘Aghia Sophia’ Children’s Hospital, School of Medicine, University of Athens.
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2016 (English)In: European Journal of Cancer Prevention, ISSN 0959-8278, E-ISSN 1473-5709, Vol. 25, no 2, 155-161 p.Article in journal (Refereed) Published
Abstract [en]

The long-term impact of cesarean delivery (CD) on the health of the offspring is being explored methodically. We sought to investigate the effect of birth by (a) prelabor and (b) during-labor CD on the risk of early-onset (≤3 years) acute lymphoblastic leukemia (ALL), specifically of its prevailing precursor B (B-ALL) subtype. A total of 1099 incident cases of ALL (957 B-ALL), 131 of acute myeloid leukemia (AML), and their 1 : 1 age-matched and sex-matched controls, derived from the Nationwide Registry for Childhood Hematological Malignancies (1996-2013), were analyzed using multivariate regression models. A null association was found between prelabor and/or during labor CD and either ALL (B-ALL) or AML in the 0-14 age range. By contrast, birth by CD increased significantly the risk of early-onset ALL [odds ratioCD (ORCD)=1.57, 95% confidence interval (CI): 1.10-2.24] mainly on account of prelabor CD (ORprelaborCD=1.66, 95% CI: 1.13-2.43). The respective figures were even higher for the early-onset precursor B-ALL (ORCD=1.66, 95% CI: 1.15-2.40 and ORprelaborCD=1.79, 95% CI: 1.21-2.66), whereas no association emerged for early-onset AML. Prelabor CD, which deprives exposure of the fetus/infant to the presumably beneficial effect of stress hormones released in both vaginal labor and during labor CD, was associated exclusively with an increased risk of early-onset ALL, particularly the precursor B-ALL subtype. If confirmed, these adverse long-term outcomes of CD may point to re-evaluation of prelabor CD practices and prompt scientific discussion on the best ways to simulate the effects of vaginal delivery, such as a precesarean induction of labor.

Place, publisher, year, edition, pages
2016. Vol. 25, no 2, 155-161 p.
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Medical and Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-260945DOI: 10.1097/CEJ.0000000000000151ISI: 000373526800010PubMedID: 25793919OAI: oai:DiVA.org:uu-260945DiVA: diva2:848865
Available from: 2015-08-26 Created: 2015-08-26 Last updated: 2017-12-04Bibliographically approved

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