Global Trends in Highly Cited Studies in COVID-19 Research

作者：Satoshi Funada, Takashi Yoshioka, Yan Luo, Toshi Iwama, C Mori, Naofumi Yamada, Hideki Yoshida, Kota Katanoda, Toshi A. Furukawa · 发表于：JAMA Network Open · 年份：2023 · DOI：10.1001/jamanetworkopen.2023.32802 · 被引用次数：20 · 研究领域：Academic Publishing and Open Access、scientometrics and bibliometrics research、Meta-analysis and systematic reviews

Importance: Since the onset of the COVID-19 outbreak, an extremely high number of studies have been published worldwide, with variable quality. Research trends of highly cited papers may enable identification of influential research, providing insights for new research ideas; it is therefore important to investigate trends and focus on more influential publications in COVID-19-related studies. Objective: To examine research trends of highly cited studies by conducting a bibliometric analysis of highly cited studies in the previous 2 months about COVID-19. Design, Setting, and Participants: In this cross-sectional study, Essential Science Indicators (ESI) and Web of Science (WOS) Core Collection were used to find studies with a focus on COVID-19 that were identified as highly cited studies from Clarivate Analytics. Highly cited studies were extracted from the ESI database bimonthly between January 2020 and December 2022. Bibliographic details were extracted from WOS and combined with ESI data using unique accession numbers. The number of highly cited studies was counted based on the fractional counting method. Data were analyzed from January through July 2023. Main Outcomes and Measures: The number of publications by research field, country, and institutional affiliation. Results: The number of published COVID-19-related highly cited studies was 14 studies in January to February 2020, peaked at 1292 studies in November to December 2021, and showed a downward trend thereafter, ...