| Literature DB >> 24838804 |
Jie Qiu, Xiaochun He, Hongmei Cui, Chong Zhang, Honghong Zhang, Yun Dang, Xudong Han, Ya Chen, Zhongfeng Tang, Hanru Zhang, Haiya Bai, Ruifeng Xu, Daling Zhu, Xiaojuan Lin, Ling Lv, Xiaoying Xu, Ru Lin, Tingting Yao, Jie Su, Xiaohui Liu, Wendi Wang, Yueyuan Wang, Bin Ma, Sufen Liu, Huang Huang, Catherine Lerro, Nan Zhao, Jiaxin Liang, Shuangge Ma, Richard A Ehrenkranz, Qing Liu, Yawei Zhang.
Abstract
Studies investigating the relationship between maternal passive smoking and the risk of preterm birth have reached inconsistent conclusions. A birth cohort study that included 10,095 nonsmoking women who delivered a singleton live birth was carried out in Lanzhou, China, between 2010 and 2012. Exposure to passive smoking during pregnancy was associated with an increased risk of very preterm birth (<32 completed weeks of gestation; odds ratio = 1.98, 95% confidence interval: 1.41, 2.76) but not moderate preterm birth (32-36 completed weeks of gestation; odds ratio = 0.98, 95% confidence interval: 0.81, 1.19). Risk of very preterm birth increased with the duration of exposure (P for trend = 0.0014). There was no variability in exposures by trimester. The associations were consistent for both medically indicated and spontaneous preterm births. Overall, our findings support a positive association between passive smoking and the risk of very preterm birth.Entities:
Keywords: China; birth cohort; passive smoking; preterm birth
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Year: 2014 PMID： 24838804 PMCID： PMC4070933 DOI： 10.1093/aje/kwu092
Source DB: PubMed Journal: Am J Epidemiol ISSN： 0002-9262 Impact factor: 4.897