Risk factors and birth outcomes of anaemia in early pregnancy in a nulliparous cohort
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Additional File 1: S1 Table.
Date
2015
Authors
Masukume, Gwinyai
Khashan, Ali S.
Kenny, Louise C.
Baker, Philip N.
Nelson, Gill
Journal Title
Journal ISSN
Volume Title
Publisher
Public Library of Science
Published Version
Abstract
Background: Anaemia in pregnancy is a major public health and economic problem worldwide, that contributes to both maternal and fetal morbidity and mortality. Objective: The aim of the study was to calculate the prevalence of anaemia in early pregnancy in a cohort of 'low risk' women participating in a large international multicentre prospective study (n = 5 609), to identify the modifiable risk factors for anaemia in pregnancy in this cohort, and to compare the birth outcomes between pregnancies with and without anaemia in early gestation. Methods: The study is an analysis of data that were collected prospectively during the Screening for Pregnancy Endpoints study. Anaemia was defined according to the World Health Organization's definition of anaemia in pregnancy (haemoglobin <11g/dL). Binary logistic regression with adjustment for potential confounders (country, maternal age, having a marital partner, ethnic origin, years of schooling, and having paid work) was the main method of analysis. Results: The hallmark findings were the low prevalence of anaemia (2.2%), that having no marital partner was an independent risk factor for having anaemia (OR 1.34, 95% CI 1.01-1.78), and that there was no statistically significant effect of anaemia on adverse pregnancy outcomes (small for gestational age, pre-tem birth, mode of delivery, low birth weight, APGAR score < 7 at one and five minutes). Adverse pregnancy outcomes were however more common in those with anaemia than in those without. Conclusion: In this low risk healthy pregnant population we found a low anaemia rate. The absence of a marital partner was a non-modifiable factor, albeit one which may reflect a variety of confounding factors, that should be considered for addition to anaemia's conceptual framework of determinants. Although not statistically significant, clinically, a trend towards a higher risk of adverse pregnancy outcomes was observed in women that were anaemic in early pregnancy.
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Keywords
Iron deficiency , Maternal anemia , Delivery , Smoking , Disease , Women
Citation
Masukume G, Khashan AS, Kenny LC, Baker PN, Nelson G, SCOPE Consortium (2015) Risk Factors and Birth Outcomes of Anaemia in Early Pregnancy in a Nulliparous Cohort. PLoS ONE 10(4): e0122729. doi:10.1371/journal.pone.0122729