Group Prenatal Care Systematic Review Search Strategy

To identify studies to include or consider for this systematic review, the review team worked with a medical librarian to develop detailed search strategies for each database. The search was developed for PubMed (NLM) translated into Embase (Elsevier), Cochrane Central (Wiley), Applied Social Sciences Index and Abstracts (ProQuest), and Web of Science Core Collection (Clarivate Analytics) ,using a combination of keywords and subject headings. A grey literature search included clinicaltrials.gov, WHO ICTRP https://trialsearch.who.int and MedRxiv (https://www.medrxiv.org) websites. The search was not limited. The final search was completed on August 11, 2023. The full search details are provided in Appendix(___). PubMed (NLM) from 04/01/1983 to 08/14/2023 (104 Results) Embase (Elsevier) from 2003 to 2023 (116 Results) Cochrane Central (Wiley) from 2007 to 2023 (35 Results) Applied Social Sciences Index and Abstracts (ProQuest)from 1971 to 2023(34 Results) Web of Science (Clarivate Analytics) from 1993 to 2023 (167 Results) The search resulted in 535 studies 207 duplicate studies were found and omitted using Endnote 20 for the deduplication of records and 328 references were eligible to screen. Studies were screened by title and abstract by two blinded and independent reviewers. If a tiebreaker was needed, a third reviewer was called in. This process was repeated for full text article screening and article selection.为确定本系统综述拟纳入或考量纳入的研究，综述团队与医学图书馆员协作，为各数据库制定了详尽的检索策略。本次检索以PubMed（美国国立医学图书馆，NLM）为基准构建，并适配至Embase（爱思唯尔，Elsevier）、Cochrane中心注册库（威利出版集团，Wiley）、应用社会科学索引与摘要库（ProQuest）以及Web of Science核心合集（科睿唯安，Clarivate Analytics），检索方案结合关键词与主题词组合搭建。 灰色文献检索覆盖clinicaltrials.gov、世界卫生组织国际临床试验注册平台（WHO ICTRP，https://trialsearch.who.int）与MedRxiv（https://www.medrxiv.org）官方网站，且未设置检索时限。本次最终检索完成于2023年8月11日，完整检索细节详见附录(___)。 各数据库的检索时限与检索结果如下：PubMed（NLM）：1983年4月1日至2023年8月14日，共获104条结果；Embase（Elsevier）：2003年至2023年，共获116条结果；Cochrane中心注册库（Wiley）：2007年至2023年，共获34条结果；应用社会科学索引与摘要库（ProQuest）：1971年至2023年，共获34条结果；Web of Science核心合集：1993年至2023年，共获167条结果。 本次检索累计获得535项研究，通过EndNote 20进行记录去重后，剔除207篇重复文献，最终剩余328篇参考文献可供初筛。研究初筛由两名盲法独立审稿人通过标题与摘要完成；若出现审稿意见分歧需裁决，则引入第三名审稿人。全文文献筛查与最终文章遴选流程重复上述步骤。