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Effect of smoking behavior before and during pregnancy on selected birth outcomes among singleton full-term pregnancy: A Murmansk county birth registry study

Journal article
Authors O. A. Kharkova
A. M. Grjibovski
Alexandra Krettek
E. Nieboer
J. Ø Odland
Published in International Journal of Environmental Research and Public Health
Volume 14
Issue 8
ISSN 1661-7827
Publication year 2017
Published at Institute of Medicine, Department of Internal Medicine and Clinical Nutrition
Language en
Links doi.org/10.3390/ijerph14080867
Keywords Cigarettes, Low Apgar score at 5 min, Low birth length, Low birth weight, Low head circumference, Low ponderal index, Murmansk County Birth Registry, Russia, Smoking, Smoking cessation, Nicotiana tabacum
Subject categories Obstetrics, Gynecology and Reproductive Medicine, Health Sciences

Abstract

The aim of our study was to assess associations between smoking behavior before and during pregnancy and selected adverse birth outcomes. This study is based on the Murmansk County Birth Registry (MCBR). Our study includes women who delivered a singleton pregnancy after 37 weeks of gestation (N = 44,486). Smoking information was self-reported and assessed at the first antenatal visit during pregnancy. We adjusted for potential confounders using logistic regression. The highest proportion of infants with low values of birth weight, birth length, head circumference, ponderal index and of the Apgar score at 5 min was observed for women who smoked both before and during pregnancy. We observed a dose-response relationship between the number of cigarettes smoked per day during pregnancy and the odds of the aforementioned adverse birth outcomes; neither were there significant differences in their occurrences among non-smokers and those who smoked before but not during pregnancy. Moreover, smoking reduction during pregnancy relative to its pre-gestation level did not influence the odds of the adverse birth outcomes. Our findings emphasize a continued need for action against tobacco smoking during pregnancy. © 2017 by the authors. Licensee MDPI, Basel, Switzerland.

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