@文章{信息:doi/10.2196/23449，作者="Lazarus, Jeffrey V和Palayew, Adam和Rasmussen, Lauge Neimann和Andersen, Tue Helms和Nicholson, Joey和Norgaard, Ole"，标题="搜索PubMed检索关于COVID-19大流行的出版物:搜索字符串的比较分析"，期刊="J Med Internet Res"，年="2020"，月="11"，日="26"，卷="22"，数="11"，页="e23449"，关键词="冠状病毒;COVID-19;大流行;科学出版社;PubMed;文献检索;研究;文学;搜索;背景:自2020年3月11日宣布全球大流行以来，COVID-19一直占据着世界各地的头条新闻，研究人员撰写了数千篇关于这种疾病的科学文章。 The fast speed of publication has challenged researchers and other stakeholders to keep up with the volume of published articles. To search the literature effectively, researchers use databases such as PubMed. Objective: The aim of this study is to evaluate the performance of different searches for COVID-19 records in PubMed and to assess the complexity of searches required. Methods: We tested PubMed searches for COVID-19 to identify which search string performed best according to standard metrics (sensitivity, precision, and F-score). We evaluated the performance of 8 different searches in PubMed during the first 10 weeks of the COVID-19 pandemic to investigate how complex a search string is needed. We also tested omitting hyphens and space characters as well as applying quotation marks. Results: The two most comprehensive search strings combining several free-text and indexed search terms performed best in terms of sensitivity (98.4{\%}/98.7{\%}) and F-score (96.5{\%}/95.7{\%}), but the single-term search COVID-19 performed best in terms of precision (95.3{\%}) and well in terms of sensitivity (94.4{\%}) and F-score (94.8{\%}). The term Wuhan virus performed the worst: 7.7{\%} for sensitivity, 78.1{\%} for precision, and 14.0{\%} for F-score. We found that deleting a hyphen or space character could omit a substantial number of records, especially when searching with SARS-CoV-2 as a single term. Conclusions: Comprehensive search strings combining free-text and indexed search terms performed better than single-term searches in PubMed, but not by a large margin compared to the single term COVID-19. For everyday searches, certain single-term searches that are entered correctly are probably sufficient, whereas more comprehensive searches should be used for systematic reviews. Still, we suggest additional measures that the US National Library of Medicine could take to support all PubMed users in searching the COVID-19 literature. ", issn="1438-8871", doi="10.2196/23449", url="//www.mybigtv.com/2020/11/e23449/", url="https://doi.org/10.2196/23449", url="http://www.ncbi.nlm.nih.gov/pubmed/33197230" }