PDF(Pubmed)
Abstract：
As birth policy can affect maternal and infant health, we sought to identify whether and how the introduction of the two-child policy might have affected the prevalence of placenta previa in pregnant women in mainland China.
In this update meta-analysis and systematic review, we searched PubMed, Web of Science, the Cochrane Library, Weipu, Wanfang, and the China National Knowledge Infrastructure (CNKI) databases for studies evaluating the prevalence of placenta previa in China published between the inception of each database and March 2024, with no restrictions. Two investigators independently extracted the data from each included study. We then combined the prevalence of placenta previa using random-effects models.
We included 128 studies in our analysis, 48 more than in our previous review. The prevalence of placenta previa among Chinese pregnant women was 1.44% (95% confidence interval (CI) = 1.32, 1.56). After the implementation of the two-child policy, the prevalence increased significantly, from 1.25% (95% CI = 1.16, 1.34) to 4.12% (95% CI = 3.33, 4.91).
The prevalence of placenta previa increased significantly from the one-child policy period to the two-child policy period among mainland Chinese pregnant women, with varying trends across regions. This change requires the attention of health officials and timely adjustment of resource allocation policies.
PROSPERO: CRD42021262309.
In this update meta-analysis and systematic review, we searched PubMed, Web of Science, the Cochrane Library, Weipu, Wanfang, and the China National Knowledge Infrastructure (CNKI) databases for studies evaluating the prevalence of placenta previa in China published between the inception of each database and March 2024, with no restrictions. Two investigators independently extracted the data from each included study. We then combined the prevalence of placenta previa using random-effects models.
We included 128 studies in our analysis, 48 more than in our previous review. The prevalence of placenta previa among Chinese pregnant women was 1.44% (95% confidence interval (CI) = 1.32, 1.56). After the implementation of the two-child policy, the prevalence increased significantly, from 1.25% (95% CI = 1.16, 1.34) to 4.12% (95% CI = 3.33, 4.91).
The prevalence of placenta previa increased significantly from the one-child policy period to the two-child policy period among mainland Chinese pregnant women, with varying trends across regions. This change requires the attention of health officials and timely adjustment of resource allocation policies.
PROSPERO: CRD42021262309.
摘要：
■由于生育政策会影响母婴健康，我们试图确定二胎政策的实施是否以及如何影响中国大陆孕妇前置胎盘的患病率.
■在本次更新的荟萃分析和系统综述中，我们搜索了PubMed,WebofScience,Cochrane图书馆,维普,万方,以及中国国家知识基础设施（CNKI）数据库，用于评估每个数据库开始至2024年3月之间中国前置胎盘患病率的研究，没有任何限制。两名研究者独立地从每个纳入的研究中提取数据。然后，我们使用随机效应模型结合前置胎盘的患病率。
■我们在分析中纳入了128项研究，比我们之前的评论多48个。中国孕妇前置胎盘患病率为1.44%(95%置信区间(CI)=1.32、1.56)。二孩政策实施后,患病率显著增加，从1.25%（95%CI=1.16，1.34）到4.12%（95%CI=3.33，4.91）。
■中国大陆孕妇从一胎政策期到二胎政策期前置胎盘患病率显著上升,不同地区的趋势各不相同。这种变化需要卫生官员的关注和及时调整资源分配政策。
■PROSPERO：CRD42021262309。
■在本次更新的荟萃分析和系统综述中，我们搜索了PubMed,WebofScience,Cochrane图书馆,维普,万方,以及中国国家知识基础设施（CNKI）数据库，用于评估每个数据库开始至2024年3月之间中国前置胎盘患病率的研究，没有任何限制。两名研究者独立地从每个纳入的研究中提取数据。然后，我们使用随机效应模型结合前置胎盘的患病率。
■我们在分析中纳入了128项研究，比我们之前的评论多48个。中国孕妇前置胎盘患病率为1.44%(95%置信区间(CI)=1.32、1.56)。二孩政策实施后,患病率显著增加，从1.25%（95%CI=1.16，1.34）到4.12%（95%CI=3.33，4.91）。
■中国大陆孕妇从一胎政策期到二胎政策期前置胎盘患病率显著上升,不同地区的趋势各不相同。这种变化需要卫生官员的关注和及时调整资源分配政策。
■PROSPERO：CRD42021262309。
