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Effect of ambient air pollution on premature SGA in Changzhou city, 2013-2016: a retrospective study. | LitMetric
Background : Air pollution is becoming an increased burden to the world. Previous studies have confirmed its effects on adverse birth outcomes, but few associated with premature small for gestational age (SGA). We report a retrospective cohort study conducted in Changzhou city to evaluate the association between air pollutants (PM, SO and NO) and premature SGA during pregnancy.Methods : A total of 46,224 births were collected from January, 2013 to December, 2016, in Changzhou Maternity and Child Health Care Hospital, finally 2709 preterm births were admitted for study. Corresponding air monitoring data were collected from Changzhou Environmental Protection Agency. Generalized estimating equations were used to examine the association between these air pollutants and premature SGA controlling for individual covariates in single- and multi-pollutant models.Results : We found that, in the third trimester, every 10 μg/m increments in PM concentration were associated with premature SGA (OR = 1.18, 95% CI: 1.03-2.83; OR = 1.37, 95% CI: 1.03-3.58) in two- and three-pollutants models. In the whole gestation, a 10 μg/m increment in PM concentration in two- and three-pollutant models were related to premature SGA (OR = 1.53, 95% CI: 1.38-2.47; OR = 1.73, 95% CI: 1.18-2.57). The OR (95% CI) of premature SGA were increasing across quintiles of PM, SO, NO concentrations during the whole gestation period adjusting for confounders (P < 0.001).Conclusions : These results indicated that pregnant women exposed to PM combined with other pollutants in the third trimester have a higher risk to deliver premature SGA babies, providing further evidence linking PM and pregnancy outcomes.
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