prevalence of postterm births and associated maternal risk factors in china: data from over 6 million births at health facilities between 2012 and 2016

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ID: 157192
2019
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Abstract
Abstract Postterm births are associated with an increased risk of adverse perinatal outcomes, but few studies have investigated the epidemiological characteristics of postterm births. We aimed to estimate the prevalence of postterm births and examine the potential association between maternal sociodemographic and obstetric characteristics and postterm births. Data were collected from China’s National Maternal Near Miss Surveillance System, 2012–2016. A logistic regression was used to assess the association between sociodemographic and obstetric characteristics and postterm births. A Poisson regression was used to determine the crude and adjusted trends of postterm births over time across regions. Among the 6,240,830 singleton births with gestational periods of 37 weeks or longer, 1.16% were postterm. The prevalence of postterm births was significantly higher in the western region and among mothers who delivered at a level ≤2 hospital, had a lower education, or were younger. A reduced risk of postterm births was observed among primiparous women, mothers who previously had a caesarean section, mothers with pregnancy complications, and mothers with ten or more antenatal visits. The risk of postterm births decreased as the number of antenatal visits increased. The overall postterm birth rates significantly decreased from 1.49% in 2012 to 0.70% in 2016. The postterm birth rates were markedly reduced in the east, central, and west regions, and the rate of the decrease was greater in the east than in the west. Furthermore, substantial decreases were observed across regions in 2014 and 2016. In conclusion, multiple sociodemographic and obstetric factors are associated with the prevalence of postterm births. A significant decreasing trend in postterm birth rates was observed in China.
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Authors ;Kui Deng;Yan Huang;Yanping Wang;Jun Zhu;Yi Mu;Xiaohong Li;Aiyun Xing;Zheng Liu;Mingrong Li;Xiaodong Wang;Juan Liang
Journal historia de la educación
Year 2019
DOI
10.1038/s41598-018-36290-7
URL
http://link.springer.com/article/10.1038/s41598-018-36290-7
Keywords
medicinescience

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