Is duration of the inter-pregnancy interval associated with subsequent preconception adiposity?
Author(s): ,
Nida Ziauddeen
Affiliations:
University of Southampton
,
Paul J Roderick
Affiliations:
University of Southampton
,
Nicholas Stephen Macklon
Affiliations:
University of Southampton
Nisreen A Alwan
Affiliations:
University of Southampton
PHE ePoster Library. Ziauddeen N. Mar 20, 2018; 205943; 12639
Ms. Nida Ziauddeen
Ms. Nida Ziauddeen
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Abstract
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Abstract Background: Maternal obesity during pregnancy increases the risk of life-long health problems in the child. With rising rates of obesity in women, a need to focus on the preconception period has been identified. The aim was to investigate the association between duration of the inter-pregnancy interval between subsequent pregnancies and change in maternal body mass index (BMI) during that period.Methods: A population-based cohort of routinely collected healthcare data for antenatal care between January 2003 and September 2017 at University Hospital Southampton was utilised. Records of women with two or more consecutive singleton pregnancies were analysed. Information on previous births was used to categorise pregnancies as first to second, second to third, third to fourth and fourth to fifth. Regression analysis was used to examine the association between change in maternal BMI at booking and inter-pregnancy interval (adjusted for timing of booking appointments, age, ethnicity, education, infertility treatment, smoking, employment status and baseline BMI).Findings: 20571 women of which 2654 had three, 530 had four and 120 had five pregnancies were included. Two-thirds had gained weight when first presenting to antenatal care for their subsequent pregnancy with 21-24% in a higher BMI category compared to 4-6% in a lower BMI category. Compared to an interval of 24-35 months, an interval of 12-23 months was associated with lowest odds of weight gain (0.77, 95% CI 0.71-0.85) and an interval of ≥36 months with the greatest odds (1.43, 95% CI 1.29-1.59).Interpretation: An inter-pregnancy interval of 12-23 months appears most protective against starting the next pregnancy with a higher body weight. Preventing weight gain between pregnancies is an important preventive measure to achieve better subsequent maternal and offspring health outcomes. Funding University of Southampton PhD studentship (NZ), Academy of Medical Sciences and Wellcome Trust (Grant no: AMS_HOP001\1060 to NAA). NAA is also in receipt of research support from the National Institute for Health Research through the NIHR Southampton Biomedical Research Centre.
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