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metrological characters of research literature in a certain field ( 8 ). Analytic tools include CiteSpace, Pajek, UCINET, VOSviewer and so on, with CiteSpace being the most popular. CiteSpace was initially developed by Chaomei Chen in 2004 ( 9 ). It has been
These authors contributed equally to this work and should be considered co-first authors
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These authors contributed equally to this work and should be considered co-first authors
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quantitatively evaluate trends in research in a certain field. The number of citations per paper is one of the markers of scientific merit. 9 , 10 A high number of citations indicates the influence of a paper on knowledge development. VOSviewer is a software
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information and publication trends of included studies, such as the number of documents, journals, authors, keywords, references, and the annual growth rate of studies. The results were exported into Microsoft Excel 365 sheets. VOSviewer ( 21 ) was used to
Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
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processed and analyzed using R software, VOSviewer, Scimago Graphica, IBM SPSS Statistics 26, and Microsoft Excel 2016. The bibliometrix package in R software was used for statistical analysis and calculation of relevant impact indicators such as citation
National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
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National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
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National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
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National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
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.1.0) ( 10 ). The changes in burst keywords with the year of publication were analyzed by CiteSpace (version 6.1. R6) software ( 11 ). VOSviewer (version 1.6.18) software was mainly used to conduct co-occurrence, co-citation, and co-authorship analyses ( 12
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VOSviewer (version 1.6.17) and CiteSpace (version 5.8.R3) were utilized to analyze the retrieved text files. CiteSpace and VOSviewer parameter settings can be found in Supplementary information 2. VOSviewer is a program presented by Nees Jan van Eck and