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Smoking cessation in the first trimester reduces most obstetric risks, but not the risks of major congenital anomalies and admission to neonatal care: a population-based cohort study of 1 164 953 singleton pregnancies in Finland.
- Source :
- Journal of Epidemiology & Community Health; Feb2014, Vol. 68 Issue 2, p159-164, 6p, 4 Charts
- Publication Year :
- 2014
-
Abstract
- Background In industrialised countries, approximately 5-20% of women smoke during pregnancy. We aim to study the association between smoking during pregnancy and adverse perinatal outcomes. Methods A retrospective population-based cohort study using data on all singleton births between 1991 and 2010 (n=1 164 953) derived from the Finnish Medical Birth Register. Results Of all the mothers included, 82.3% were nonsmokers, 2.6% quit smoking during the first trimester of pregnancy, 12.5% smoked throughout pregnancy and 2.7% had no information on smoking. Continuing smoking after the first trimester of the pregnancy was associated with an increased prevalence of admission to a neonatal intensive care unit, stillbirth, preterm birth (<37 gestational weeks), low birth weight (LBW, <2500 g), small for gestational age (SGA, <-2 SDs) and major congenital anomaly compared with nonsmokers. Smoking cessation reduced the risk of prematurity, stillbirth, LBW and SGA close to or at similar levels as those of non-smokers. Tobacco exposure in early pregnancy resulted in a 19% increased prevalence of admission to neonatal intensive care unit and a 22% increased prevalence of major congenital anomaly compared with non-smokers. Conclusions Smoking cessation appeared to reduce pregnancy risks close to those of non-smoking peers. Exposure to early pregnancy smoking was, however, associated with an increased admission to neonatal intensive care and an increased prevalence of major congenital anomalies. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0143005X
- Volume :
- 68
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Journal of Epidemiology & Community Health
- Publication Type :
- Academic Journal
- Accession number :
- 93644631
- Full Text :
- https://doi.org/10.1136/jech-2013-202991