Air pollution-induced missed abortion risk for pregnancies

Liqiang Zhang (), Weiwei Liu (), Kun Hou, Jintai Lin (), Chenghu Zhou (), Xiaohua Tong, Ziye Wang, Yuebin Wang, Yanxiao Jiang, Ziwei Wang, Yibo Zheng, Yonglian Lan, Suhong Liu, Ruijing Ni, Mengyao Liu and Panpan Zhu
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Liqiang Zhang: Beijing Normal University
Weiwei Liu: Capital Medical University
Kun Hou: Beijing Normal University
Jintai Lin: Peking University
Chenghu Zhou: Institute of Geographical Science and Natural Resources, Chinese Academy of Sciences
Xiaohua Tong: Tongji University
Ziye Wang: Beijing Normal University
Yuebin Wang: Beijing Normal University
Yanxiao Jiang: Beijing Normal University
Ziwei Wang: Peking University
Yibo Zheng: Beijing Normal University
Yonglian Lan: Capital Medical University
Suhong Liu: Beijing Normal University
Ruijing Ni: Peking University
Mengyao Liu: Peking University
Panpan Zhu: Beijing Normal University

Nature Sustainability, 2019, vol. 2, issue 11, 1011-1017

Abstract: Abstract Fetus death risk reduction is included in the United Nations Sustainable Development Goals. However, little is known about how missed abortion in the first trimester (MAFT) is related to maternal air pollution exposure. We quantify the link between air pollution exposure and MAFT in Beijing, China, a region with severe MAFT and air quality problems. We analyse the records of 255,668 pregnant women from 2009 to 2017 and contrast them with maternal exposure to air pollutants (particulate matter PM2.5, SO2, O3 and CO). We adjust for confounding factors such as sociodemographic characteristics, spatial autocorrelation and ambient temperature. We find that, for all four pollutants, an increased risk of MAFT is associated with rises in pollutant concentrations and the adjusted odds ratios (ORs) of these associations increase with higher concentrations. For example, the adjusted OR of MAFT risk for a 10.0 μg m−3 increase in SO2 exposure is between 1.29 and 1.41 at concentrations of 7.1–19.5 μg m−3; it drops to 1.17 below this range and rises to 1.52 above it at higher SO2 concentrations. This means that the risk increase is not linear but becomes more severe the higher the pollutant concentration. The findings provide evidence linking fetus disease burden and maternal air pollution exposure.

Date: 2019
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DOI: 10.1038/s41893-019-0387-y

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