Producción Científica

Background: With an ever growing and expanding body of literature on the newly developed vaccines against the COVID-19, there is an urgent need for a comprehensive analysis of the current state of research on vaccine effectiveness (VE). This study conducted a comprehensive bibliometric analysis to critically examine the productivity and impact of retrieved publications on COVID-19 VE and to predict the future directions of research in the field. Methods: The global literature on COVID-19 VE from 2021 to 2024 was extracted from the VIEW-hub website. Using bibliometric analysis tools, specifically Microsoft Excel, the R package “bibliometrix, biblioshiny” and VOSviewer, we analyzed publications for trends in productivity, citations, and global collaboration. Key metrics assessed include publication and citation trends, influential authors, collaborative networks, and thematic evolution, offering a comprehensive view of the research landscape on COVID-19 VE. Results: A total of 490 publications were authored by 5031 authors from 934 institutions and 78 countries and published in 119 journals. Most retrieved publications were original articles (99.6 %). The United States was the most productive country with 205 publications (41.8 %). Global research collaborations were mainly within developed countries. Analysis of the thematic evolution of the field illustrated changing research focus over three distinct time clusters. Throughout 2021, studies were focused on outlining infection prevention and control measures, as well as examining the efficacy of novel mRNA vaccines. In 2022, the linchpin of research was shifted towards dissecting the epidemiological correlates of the pandemic in light of the widespread use of vaccines. The final cluster showed special emphasis on the new variants of COVID-19 and the long-term outcomes of vaccines. Conclusion: Our study identified geopolitical disparities and weak engagement from developing countries in the ongoing efforts regarding COVID-19 VE. This study can inform researchers, policymakers, and funding agencies as they assess ongoing research and future directions in COVID-19 VE.

Background: Stroke patients often experience various functional impairments. Transcranial magnetic stimulation (TMS) has emerged as a novel non-invasive brain stimulation technique, and has gained widespread attention over the past 30 years for its application in stroke. The present study used bibliometric and content analysis methods to explore the research hotspots and future trends of TMS in stroke, with an aim to provide benefits for subsequent research. Methods: Publications and reviews related to TMS in stroke from 1992 to 2022 were retrieved from the Web of Science Core Collection database. Data visualization and analysis were performed using CiteSpace, VOSviewer, and Scimago Graphica. Results: We included 1666 papers in the analysis and noted an increasing trend in annual publication volume. Collaboration network analysis revealed close cooperation among scholars from these major countries and institutions. Emerging keywords included TMS, stroke, recovery, rehabilitation, rTMS, plasticity, cortex, excitability, upper limb, and tDCS. Keyword citation bursts appeared to be shifting toward clinical applications, including functional connectivity, systematic reviews, double-blind studies, connectivity, injury, and dysphagia. Conclusion: Our study indicates substantial growth in TMS publications and citations in stroke rehabilitation since 2006, suggesting a maturing field that is advancing toward more sophisticated treatment protocols. The increasing relevance of TMS in neurological and rehabilitative applications highlights its potential for promoting post-stroke recovery. Emerging keywords such as brain functional connectivity, systematic reviews, and double-blind studies highlight a shift toward clinical applications. The future of TMS in stroke rehabilitation promises continued growth, interdisciplinary approaches, and improved patient outcomes.

Purpose: The time from article submission to publication in peer-reviewed scientific journals is variable and can be prolonged, which slows the dissemination of research and can influence the academic progress of authors. This study evaluated the publication times for articles in radiology journals, in particular the relationship between turnaround times and journal impact factors (IFs). Methods: Bibliometric data was obtained from Journal Citation Reports to conduct a comparative analysis of radiology journals against those in other disciplines of clinical medicine using highest IF, median IF, cited half-life, immediacy index, and number of journals. Journals from various radiology subcategories were further examined to assess IF trends over time. The Pearson correlation coefficient was used to identify any statistically significant relationships between IF and other variables. Results: Among 28 medical disciplines, there was a significant positive correlation of 0.63 between the number of journals and the highest journal IF of a given discipline. Among 135 radiology journals categorized into 12 subcategories, there was a similar significant correlation of 0.64. For high-ranking radiology journals, the median time from submission to publication online was 22.7 weeks [IQR = 9.3] and median time from submission to publication in print was 37.9 weeks [IQR = 7.1]. The former time interval showed a positive correlation of 0.58 with journal IF at p < 0.05. Conclusion: There is wide variation in the time from submission to publication in radiology journals. Authors can expect a longer turnaround time when publishing in higher-impact journals.

Objective: This study aims to analyze and visualize global research trends and hotspots in rheumatoid arthritis joint replacement over the past two decades using CiteSpace and VOSviewer software.The findings from this bibliometric analysis will inform and guide future research directions in this field. Methods: We searched for relevant literature on rheumatoid arthritis joint replacement from January 2005 to August 2024 in the Web of Science database.Using CiteSpace, VOSviewer,and Bibliometrix software,we analysed keywords, authors,institutions, countries,and journals,and constructed a network cooperation map. Results: A total of 2888 articles written by 11,723 authors from 70 countries and 3194 institutions were analysed and published in 530 journals.The United States, with 855 publications accounting for 29.61%of the world’s total,and the United Kingdom, with 332 publications representing 11.50 %,made the greatest contributions.Additionally,the United States maintains strong collaborative relationships with many countries. According to the analysis of the outbreak keyword map, the joint replacement of rheumatoid arthritis has become mature, and the complications, prognosis and functional rehabilitation of joint replacement are the main focus of research in this field. Conclusion: we conducted a comprehensive summary of the literature on rheumatoid arthritis joint replacement published between 2005 and 2024 using bibliometrics and visual analysis.This enabled us to identify the development trends and research hotspots in this field over the past two decades, offering valuable insights for researchers planning future studies in this area.