Main Data for Clinical Trials Registry use by Systematic reviews and Meta-analyses in Pregnancy and Childbirth Journals

This data represents the coding results for the top 20 Journals in the Pregnancy and Childbirth literature. A 1 indicates that a systematic review or meta-analysis searched clinical trials registry, while a 0 indicates that the trials registry was not searched. The columns represent the clinical trials registries that were searched, while individual rows are representative of the study in question (except for the sum rows).本数据集收录了妊娠与分娩领域前20种顶级期刊的文献编码结果。其中标记为1代表该研究为系统综述（systematic review）或元分析（meta-analysis）且已检索临床试验注册库（clinical trials registry），标记为0则代表未检索该类注册库。本数据集的列对应所检索的临床试验注册库，各行（汇总行除外）对应单篇纳入研究。