bims-evares Biomed News
on Evaluation of research
Issue of 2021‒02‒28
fifty-one papers selected by
Thomas Krichel
Open Library Society

  1. BJS Open. 2021 Jan 08. pii: zraa039. [Epub ahead of print]5(1):
      BACKGROUND: Bibliometric and Altmetric analyses provide different perspectives regarding research impact. This study aimed to determine whether Altmetric score was associated with citation rate independent of established bibliometrics.METHODS: Citations related to a previous cohort of 100 most cited articles in surgery were collected and a 3-year interval citation gain calculated. Citation count, citation rate index, Altmetric score, 5-year impact factor, and Oxford Centre for Evidence-Based Medicine levels were used to estimate citation rate prospect.
    RESULTS: The median interval citation gain was 161 (i.q.r. 83-281); 74 and 62 articles had an increase in citation rate index (median increase 2.8 (i.q.r. -0.1 to 7.7)) and Altmetric score (median increase 3 (0-4)) respectively. Receiver operating characteristic (ROC) curve analysis revealed that citation rate index (area under the curve (AUC) 0.86, 95 per cent c.i. 0.79 to 0.93; P < 0.001) and Altmetric score (AUC 0.65, 0.55 to 0.76; P = 0.008) were associated with higher interval citation gain. An Altmetric score critical threshold of 2 or more was associated with a better interval citation gain when dichotomized at the interval citation gain median (odds ratio (OR) 4.94, 95 per cent c.i. 1.99 to 12.26; P = 0.001) or upper quartile (OR 4.13, 1.60 to 10.66; P = 0.003). Multivariable analysis revealed only citation rate index to be independently associated with interval citation gain when dichotomized at the median (OR 18.22, 6.70 to 49.55; P < 0.001) or upper quartile (OR 19.30, 4.23 to 88.15; P < 0.001).
    CONCLUSION: Citation rate index and Altmetric score appear to be important predictors of interval citation gain, and better at predicting future citations than the historical and established impact factor and Oxford Centre for Evidence-Based Medicine quality descriptors.
  2. Urologia. 2021 Feb 25. 391560321993559
      Erectile dysfunction (ED) is a common condition encountered by an array of subspecialists and is the most cited research topic within the field of andrology. This bibliometric analysis aims to identify the most influential papers that inform current clinical practice and likely shape future research. The Thompson Reuters Web of Science citation database was interrogated using search terms to cover the breadth of erectile dysfunction. Results were ranked according to citation number with country of origin, journal, topic, year of publication, author and institution also analysed. The search criteria matched 12,570 manuscripts. The top 100 highest citation ranged from 3013 to 161 (median 229.5). The most cited manuscript reports the prevalence and risk factors of ED within the Massachusetts Male Aging Study. The most manuscripts were published by the Journal of Urology (n = 15) with a total of 7913 citations. Institutions from the USA contributed the majority (n = 55) with the UK (n = 14) second. The most common theme represented was epidemiology (n = 46) followed by treatment (n = 27). This analysis provides a list of the most influential manuscripts within ED and illustrates what can be considered a 'highly citable' paper. The most influential papers in Erectile Dysfunction remain seminal works from the end of the last century. The most cited manuscript has been cited 194 times in the last 17 months showing its continued value. Only one paper published within the last decade has reached the top twenty exemplifying the relative lack of novel influential publications.
    Keywords:  Erectile dysfunction; andrology; bibliometrics; impotence; impotent
  3. J Conserv Dent. 2020 Jul-Aug;23(4):23(4): 325-329
      Regenerative endodontics (RE) is a dynamic field with widespread global impact. The aim of this bibliometric analysis is to highlight India's contribution in the field. Electronic search was performed in PubMed and Web of Science database till December 2019 using the search terms "Dental pulp regeneration," "Pulp revascularisation," "Revitalisation," "Regenerative endodontic," and their permutation. Articles of Indian authors with affiliation to Indian institutes were included. The following data were extracted: first author, institute and state of affiliation, year and journal of publication, study design, level of evidence (LOE), and number of citations. A total of 76 articles (case reports [n = 29, 38.15%], review [n = 25, 32.8%]) were published between 2008 and 2019. Majority (42.6%) were categorized as LOE 4. 7.4% articles were in LOE1 category. Eight percent articles had citations above 100 (highest cited-354 citations). The average yearly growth rate between 2011 and 2019 was 33.28% and highest number of publications was in the year 2015. The south zone had the maximum publications. At an institutional level, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, had the maximum publications. Journal of Conservative Dentistry published the highest number of articles. India contributed 7.6% of the global PubMed indexed publications and reported 22% of clinical trials. This analysis reveals increasing trend of research in RE in India. However, it highlights the need to generate articles with higher LOE by conducting quality multicenter trials and promote national and international collaborations.
    Keywords:  Bibliometric analysis; pulp regeneration; regenerative endodontics
  4. World Neurosurg. 2021 Feb 18. pii: S1878-8750(21)00237-0. [Epub ahead of print]
      BACKGROUND: In recent years, there has been increasing study of ossification of the posterior longitudinal ligament (OPLL), leading to a large number of publications on this topic. We aimed to identify trends in OPLL-related research and to analyze the most highly cited scientific publications on OPLL.METHODS: We searched the Web of Science Core Collection database for all publications on OPLL. The years of publication, countries, journals, institutions, and total citations were extracted and analyzed. Results related to countries, institutions, and keywords were subjected to co-occurrence analysis using VOSviewer software. The top 100 most-cited publications on OPLL were analyzed.
    RESULTS: A total of 876 publications related to OPLL were identified. The frequency of publication on OPLL has increased substantially over time. Among all countries, Japan has contributed the most publications on OPLL (n=349). The most productive institution has been Hirosaki University (n=57). SPINE topped the list of journals and has published 120 OPLL-related articles that received 4,221 total citations. The surgical treatment of OPLL has been the most common research focus in the OPLL literature.
    CONCLUSIONS: The scientific literature on OPLL has rapidly expanded in recent years. This study represents the first bibliometric analysis of scientific publications on OPLL and can serve as a useful guide to clinicians and researchers in the field.
    Keywords:  OPLL; Ossification of the posterior longitudinal ligament; VOSviewer; bibliometric analysis; research trends
  5. Turk J Gastroenterol. 2020 Dec;31(12): 877-882
      BACKGROUND/AIMS: Autoimmune hepatitis (AIH), primary biliary cholangitis (PBC), and primary sclerosing cholangitis (PSC) are the 3 main autoimmune liver diseases (AILDs). The epidemiology of AILD in Turkey is not known. To determine the scientific status, we performed a scientometric analysis of AILD-related original articles that originated from Turkey.MATERIALS AND METHODS: We searched the Web of Science database, the Science Citation Index Expanded (SCI-E), and the Social Sciences Citation Index (SSCI) by using the keywords "autoimmune hepatitis," "primary biliary cholangitis/primary biliary cirrhosis," and "primary sclerosing cholangitis" in conjunction with "Turkey." A scientometric analysis was done on the search results.
    RESULTS: We identified 117 AILD-related papers that were published in Turkey from 1997 to 2019. Among these, 70 case reports, letters, and reviews and 2 original articles that were not cited in SCI-E/SSCI were excluded. The remaining 45 original articles were further analyzed. These studies were related to AIH (n=22), PBC (n=7), PSC (n=9), PBC-AIH overlap (n=5), and others (n=2). Four of the publications originated in pediatric settings; 9 of 45 papers were published from 1997 to 2008 and 36 papers were published from 2009 to 2019. Most papers (75%) were reported from 5 centers; 9 papers (20%) were published in journals with an impact factor of 3 or higher.
    CONCLUSION: The overall number and quality of AILD-related papers in Turkey are unexpectedly low, although a number of papers have received considerable international recognition. More epidemiologic, prospective, and multicenter research projects are warranted to advance AILD knowledge and to produce high-quality research from Turkey.
  6. Orthop J Sports Med. 2021 Jan;9(1): 2325967120972016
      Background: Studies with a low level of evidence (LOE) have dominated the top cited research in many areas of orthopaedics. The wide range of treatment options for patellar instability necessitates an investigation to determine the types of studies that drive clinical practice.Purpose: To determine (1) the top 50 most cited articles on patellar instability and (2) the correlation between the number of citations and LOE or methodological quality.
    Study Design: Cross-sectional study.
    Methods: The Scopus and Web of Science databases were assessed to determine the top 50 most cited articles on patellar instability between 1985 and 2019. Bibliographic information, number of citations, and LOE were collected. Methodological quality was calculated using the Modified Coleman Methodology Score (MCMS) and the Methodological Index for Non-Randomized Studies (MINORS). Mean citations and mean citation density (citations per year) were correlated with LOE, MCMS, and MINORS scores.
    Results: Most studies were cadaveric (n = 10; 20.0%), published in the American Journal of Sports Medicine (n = 13; 26.0%), published between 2000 and 2009 (n = 41; 82.0%), and conducted in the United States (n = 17; 34.0%). The mean number of citations and the citation density were 158.61 ± 59.53 (range, 95.5-400.5) and 12.74 ± 5.12, respectively. The mean MCMS and MINORS scores were 59.62 ± 12.58 and 16.24 ± 3.72, respectively. No correlation was seen between mean number of citations or citation density versus LOE. A significant difference was found in the mean LOE of articles published between 1990 and 1999 (5.0 ± 0) versus those published between 2000 and 2009 (3.12 ± 1.38; P = .03) and between 2010 and 2019 (3.00 ± 1.10; P = .01).
    Conclusion: There was a shift in research from anatomy toward outcomes in patellar instability; however, these articles demonstrated low LOE and methodological quality. Higher quality studies are necessary to establish informed standards of management of patellar instability.
    Keywords:  citations; level of evidence; medial patellofemoral ligament; methodological quality; patellar dislocation; patellar instability; trochleoplasty
  7. Arthrosc Sports Med Rehabil. 2021 Feb;3(1): e127-e134
      Purpose: To identify and characterize the top 50 most-cited articles regarding SLAP tears.Methods: Referencing the methodology of previous citation analyses, varying Boolean searches were performed using the Web of Science database and the search terms yielding the greatest number of results was used. The top 50 most-cited articles were identified and the following data points were gathered from each article: author, institution, country of origin, year of publication, publishing journal, level of evidence, and citation density.
    Results: The total number of citations was 7834, with a median of 106 citations. The top 50 list was largely composed of diagnostic level I, II, and III studies (5, 7, and 8 total publications, respectively) and therapeutic level III (6 publications) or level IV (10 publications). Most articles originated from the United States (40). In total, 19 of the top 50 most-cited articles were published in the American Journal of Sports Medicine, followed by Arthroscopy (15) and the Journal of Bone and Joint Surgery (5).
    Conclusions: Our analysis demonstrated a correlation with earlier publications being cited more frequently than recent studies. Importantly, the current study found that therapeutic studies in the most cited list were largely level III or level IV evidence. This makes the management of SLAP tears seem anecdotal, with little in the way of high-impact level I or level II therapeutic studies. We must reconsider our current understanding of SLAP tears and their management with more studies that demonstrate a clearer treatment algorithm for these common injuries of the shoulder.
    Clinical Relevance: Given the complexity of SLAP tears, this list of the most-cited articles can provide a reference point to better guide practice, resident education, and future areas of orthopaedic research.
  8. Drug Alcohol Depend. 2021 Feb 15. pii: S0376-8716(21)00111-3. [Epub ahead of print]221 108616
      The number of citations a peer-reviewed article receives is often used as a measure of its importance and scientific impact. This paper identifies, describes and categorizes the highly cited papers in addiction research on cannabis, heroin, cocaine and psychostimulants. Highly cited papers were identified in the Web of Science Core Collection database. Several bibliometric indicators were calculated. Social network analysis was applied to draw groups of authors and institutions with the greatest number of collaborations and co-words. The number of citations for the top 100 cited articles ranged from 649 to 4,672. The articles were published in 40 journals. The subject category Substance Abuse included 10 papers. The United States was the most productive country (79 papers), followed by the United Kingdom (9). The main funding institutions were the National Institutes of Health in the United States. The network of collaboration between authors distributes the 352 researchers into 53 groups. The three most cited works address the neural basis of drug craving as an incentive-sensitization theory of addiction, the clinical and research uses of the Addiction Severity Index, and the neurocircuitry of addiction. Scientific literature on addictions is widely dispersed both in multidisciplinary and specific journals of neurology, psychiatry and addictions, with relatively few publications providing most of the citations. An ongoing challenge for this field is the concentration of highly cited papers coming from a select number of countries, with the United States being the research hub of the world, with the highest volume of publications and total citations.
    Keywords:  Bibliometrics; Cited papers; Substance related disorders
  9. Eur J Med Res. 2021 Feb 23. 26(1): 22
      BACKGROUND: Citation analysis has been increasingly applied to assess the quantity and quality of scientific research in various fields worldwide. However, these analyses on spinal surgery do not provide visualization of results. This study aims (1) to evaluate the worldwide research citations and publications on spinal surgery and (2) to provide visual representations using Kano diagrams onto the research analysis for spinal surgeons and researchers.METHODS: Article abstracts published between 2007 and 2018 were downloaded from PubMed Central (PMC) in 5 journals, including Spine, European Spine Journal, The Spine Journal, Journal of Neurosurgery: Spine, and Journal of Spinal Disorders and Techniques. The article types, affiliated countries, authors, and Medical subject headings (MeSH terms) were analyzed by the number of article citations using x-index. Choropleth maps and Kano diagrams were applied to present these results. The trends of MeSH terms over the years were plotted and analyzed.
    RESULTS: A total of 18,808 publications were extracted from the PMC database, and 17,245 were affiliated to countries/areas. The 12-year impact factor for the five spine journals is 5.758. We observed that (1) the largest number of articles on spinal surgery was from North America (6417, 37.21%). Spine earns the highest x-index (= 82.96). Comparative Study has the highest x-index (= 66.74) among all article types. (2) The United States performed exceptionally in x-indexes (= 56.86 and 44.5) on both analyses done on the total 18,808 and the top 100 most cited articles, respectively. The most influential author whose x-index reaches 15.11 was Simon Dagenais from the US. (3) The most cited MeSH term with an x-index of 23.05 was surgery based on the top 100 most cited articles. The most cited article (PMID = 18164449) was written by Dagenais and his colleagues in 2008. The most productive author was Michael G. Fehlings, whose x-index and the author's impact factor are 13.57(= √(13.16*14)) and 9.86(= 331.57/33.64), respectively.
    CONCLUSIONS: There was a rapidly increasing scientific productivity in the field of spinal surgery in the past 12 years. The US has extraordinary contributions to the publications. Furthermore, China and Japan have increasing numbers of publications on spinal surgery. This study with Kano diagrams provides an insight into the research for spinal surgeons and researchers.
    Keywords:  Choropleth map; Citation analysis; Kano diagram; PubMed central; Research productivity; Spine
  10. Zhonghua Shao Shang Za Zhi. 2021 Feb 20. 37(3): 1-12
      Objective: To conduct a bibliometric and visual analysis of the current status and trends of international research on keloids. Methods: The articles on keloid research from 2000 to 2020 in the core collection of Web of Science database were retrieved. The bibliometrics method was applied to analyze the number of articles published per year, journals and first authors, countries and research institutions, research fields, the annual citation frequency of cumulative published articles, highly cited articles, keywords. CiteSpace V software was applied to visually cluster keywords, while VOS-viewer software was applied to visually cluster keywords in titles and abstracts in order to analyze research directions and development trends. Results: A total of 2 693 keloid-related articles were retrieved. From 2000 to 2020, the number of keloid-related articles published every year showed a significant upward trend. Totally 777 journals published keloid-related articles, of which "Dermatologic Surgery" published the most. Rei Ogawa published the largest number of keloid-related articles as the first author, who published 52 related articles. A total of 98 countries conducted keloid-related research, of which the United States was the country with the largest number of related articles published (613 articles), followed by China (524 articles) and Japan (107 articles). A total of 2 656 institutions conducted keloid-related research, and the institution with the largest number of related articles published was Shanghai Jiao Tong University of China (67 articles). According to the subject classification of the Web of Science database, the included articles involved 110 research fields, and the top three were dermatology, surgery, and medicine, research and experimental. The included articles were cited 47 746 times in total, and the citation frequency of cumulative published articles increased by year. The most frequently cited article (152 times) was published in 2011. There were a total of 45 571 keywords in the included literature. The top 5 keywords ranked according to the number of articles involved from high to low were keloid (588 articles), hypertrophic scar (385 articles), expression (198 articles), fibroblast (155 articles), and scar (133 articles). The keyword map visualized by CiteSpaceV software further displayed that the research focused on the cause, performance, and composition of keloids. VOS-viewer software analysis showed that the research direction of keloids was divided into two categories of clinical keloid management and keloid mechanism research; the initial research hotspots were mainly to explore the diagnosis and treatment of keloids from individual cases, with a preference for apparent research; in the later stage, the focus was on the overall management of keloids, in which the mechanism research went to the molecular level. Conclusions: At present, international research interest on keloids is showing an upward trend. Both foreign (the United States, etc.) and domestic research institutions are conducting in-depth explorations of keloids. With dermatology as the leader, the research trend is gradually shifting from apparent research to molecular research.
    Keywords:  Bibliometrics; Cluster analysis; Keloid; Visualized analysis
  11. Cancer Manag Res. 2021 ;13 1383-1393
      Background: Globally lung cancer is one of the most common cancers, and is responsible for almost 20% of all cancer care costs. As a potential treatment for lung cancer, anti-PD-1/PD-L1 therapy has become a novel scientific hotspot in recent decades. The present study aims at exploring the status and trends of the top frequently cited publications about the anti-PD-1/PD-L1 therapy for lung cancer via bibliometric analysis.Methods: The publications concerning anti-PD-1/PD-L1 therapy for lung cancer were searched on the core collection database of Web of Science, setting the time period for retrieval from 1950 to 2019. The top 100 most frequently cited publications were retrieved, and the bibliometric data were mainly accessed through an open online analysis platform and VOSviewer software.
    Results: The cited frequencies about the top 100 cited publications ranged from 218 to 6248. These articles were published in 39 publications, which were mainly ranked in Q1. The top journal in terms of the number of the articles was the New England Journal of Medicine (16 articles). The most frequently nominated author was Brahmer, JR from Sidney Kimmel Comprehensive Cancer Center, while the most contributing institution was Memorial Sloan Kettering Cancer. The United States acted as the pioneer in this new field of research and led plentiful of national and international co-operations. Immunotherapy, nivolumab, cell lung-cancer, safety, and docetaxel appeared more frequently as keywords.
    Discussions: To sum up, high quality journals, influential authors and institutions and research with high quality evidence were apt to attract more attention and possess more public credibility. Moreover, the bibliometric analysis is yielding up its advantage of identifying and analyzing the characteristics and changes in the intellectual structures of a special topic.
    Keywords:  VOSviewer; anti-PD-1/PD-L1 therapy; bibliometrics; lung cancer
  12. Orthop J Sports Med. 2021 Feb;9(2): 2325967120976372
      Background: The concept of anterior cruciate ligament (ACL) reconstruction (ACLR) has become widely accepted, gaining increased attention in recent years and resulting in many research achievements in this field.Purpose: The aim of this study was to determine which original articles on ACLR have been most influential in this field by identifying and analyzing the characteristics of the 100 most cited articles.
    Study Design: Cross-sectional study.
    Methods: Articles on ACLR were identified via the Thomson ISI Web of Science database on November 30, 2019. The 100 most cited articles were identified based on inclusion and exclusion criteria. The data extracted from each article for the subsequent analysis included title, date of publication, total citations, average citations per year (ACY), journal name, first author, institutions, themes, level of evidence, and keywords.
    Results: The total number of citations was 29,629. The date of publication ranged from 1975 to 2015. A majority of the articles originated from the United States (58%) and were published in the 1990s (32%) and 2000s (48%). The mean ACY was 18.43 ± 9.51. Of the selected articles, nearly one-half were published in the American Journal of Sports Medicine (42%). The most prolific co-author and first author were Freddie H. Fu (n = 13) and K. Donald Shelbourne (n = 5), respectively. The most productive institution was the University of Pittsburgh (14%). Material comparison (19%) and technique comparison (16%) were the 2 most popular themes. More than one-quarter of articles were level 4 evidence (37%). Moreover, the keywords ACL, ACL reconstruction, ACL rupture, knee joint, knee injuries, and human showed the highest degree of centrality.
    Conclusion: By analyzing the characteristics of articles, this study demonstrated that ACLR is a growing and popular area of research, with the focus of research varying through timeline trends. Studies on anatomic reconstruction and biomechanics might be areas of future trends.
    Keywords:  ACL; anterior cruciate ligament; bibliometric analysis; citations; knee; most cited articles; reconstruction
  13. Biomed Res Int. 2021 ;2021 8836395
      Objective: To identify and evaluate characteristics of the most influential articles in achalasia research during the period 1995-2020.Methods: Articles in Scopus, Web of Science Core Collection (WoSCC), and PubMed were scanned from 1995 to 2020 with achalasia as the keyword. We retrieved the articles that met all criteria by descending order after using EndNote to remove the duplicated references. Our bibliometric analysis highlighted publication year, country, journals, and networks of keywords.
    Results: Fifteen percent of the top 100 most-cited articles were published in Annals of Surgery. They were performed in 15 countries, and most (n = 55) were from the USA. The number of citations of the 482 articles ranged from 30 to 953, 38 of which had been published in American Journal of Gastroenterology. Those articles were from 31 countries, and most of the studies (n = 217) had been performed in the USA. Most of articles (n = 335) were clinical research. Treatments were hotspots in the field of achalasia in the past years. The most influential title words were "achalasia," "esophagomyotomy," "pneumatic dilation," and "lower esophageal sphincter."
    Conclusion: Our study offers a historical perspective on the progress of achalasia research and identified the most significant evolution in this field. Results showed treatment was the most influence aspect in achalasia.
  14. Channels (Austin). 2021 Dec;15(1): 298-309
      To explore the research status, hotspots, and trends in research on nicotinic acetylcholine receptor (nAChR) channel. The Web of Science core collection database from 2000 to 2020 was used as the data source. The visual analysis software VOSviewer1.6.16 and Citespace5.7 R3 were used to visualize the studies of the nAChR channel. The national/institutional distribution, journal distribution, authors, and related research were discussed. A total of 5,794 articles were obtained. The USA and the Utah System of Higher Education were the most productive country and institution for nAChR channel research. Journal of Biological Chemistry was the most productive journal (212) and the most productive researcher was McIntosh, J. Michael. The first highly co-cited article was "Refined structure of the nicotinic acetylcholine receptor at 4A resolution." The most researched area was neurosciences neurology. The hot spots of nAChR channel research were "subunit and structure of nAChR," "activation/agonist of nAChR channel," and "Changes in nAChRs With Alzheimer's Disease." The top three research frontiers of nAChR channel research were "neuropathic pain," "neuroinflammation," and "α7 nACHR." The study provides a perspective to visualize and analyze hotspots and emerging trends in the nAChR channel.
    Keywords:  Nicotinic; acetylcholine receptor channel; citespace; visual analysis; vosviewer
  15. Scientometrics. 2021 Feb 14. 1-27
      To encourage research transparency and replication, more and more journals have been requiring authors to share original datasets and analytic procedures supporting their publications. Does open data boost journal impact? In this article, we report one of the first empirical studies to assess the effects of open data on journal impact. China Industrial Economics (CIE) mandated authors to open their research data in the end of 2016, which is the first to embrace open data among Chinese journals and provides a natural experiment for policy evaluation. We use the data of 37 Chinese economics journals from 2001 to 2019 and apply synthetic control method to causally estimate the effects of open data, and our results show that open data has significantly increased the citations of journal articles. On average, the current- and second-year citations of articles published with CIE have increased by 1 ~ 4 times, and articles published before the open data policy also benefited from the spillover effect. Our findings suggest that journals can leverage compulsory open data to develop reputation and amplify academic impacts.
    Keywords:  Economics; Impact factor; Open data; Open science; Research transparency
  16. Nurs Open. 2021 Feb 24.
      AIM: This study aimed to describe and visualize the current research state and collaborative networks in home care safety for older adults over the past 11 years to analyse the gaps of research and future research trends.BACKGROUND: The amount of research on safety in home care for older adults is increasing. It is necessary to understand the status of development and main research topics and identify the main contributors and their relationships.
    METHODS: A total of 2,631 publications were retrieved from the Web of Science. The external characteristics of the publications were summarized with the Web of Science and Histcite. Collaborative networks and keywords were analysed and visually displayed using analysis tools.
    RESULTS: The number of articles increased over the years. Articles were identified from 79 countries, 3,630 institutions, 647 journals and 11,691 authors, and complex cooperative relations among them and five research topics were identified.
    CONCLUSION: Research on home care safety for older adults is developing steadily, and this field may be understood to a greater extent in the future. Countries, institutions and scholars need to cooperate more in this research field.
    IMPLICATIONS FOR NURSING MANAGEMENT: This study contributes important information for understanding achievements in the research field of home care safety and provides insights into future research.
    Keywords:  bibliometrics; home care; older adults; patient safety
  17. Arthrosc Sports Med Rehabil. 2021 Feb;3(1): e277-e287
      Purpose: To determine the 50 most frequently cited studies in the orthopaedic shoulder arthroscopy literature and to conduct a bibliometric analysis of these studies.Methods: The Clarivate Analytics Web of Knowledge database was used to gather data and metrics using Boolean queries to capture all possible iterations of shoulder arthroscopy research. The search list was sorted so that articles were organized in descending order based on the number of citations and included or excluded based on relevance to shoulder arthroscopy. The information extracted for each article included author name, publication year, country of origin, journal name, article type, and the level of evidence.
    Results: For these 50 studies, the total number of citations was calculated to be 13,910, with an average of 278.2 citations per paper. The most-cited article was cited 1134 times, whereas the second- and third-most cited articles were cited 920 and 745 times, respectively. All 50 articles were published in English and came from 7 different orthopaedic journals. The United States was responsible for most of the included articles (31), followed by France (9) and Japan (3).
    Conclusions: The majority of the most-cited articles in shoulder arthroscopy are case series and descriptive studies originating from the United States. In addition, more than one half of the top 50 most-cited studies were published after 2004, which suggests that article age may be less important in the accumulation of citations for a rapidly growing field like shoulder arthroscopy.
    Clinical Relevance: The top 50 most-cited studies list will provide researchers, medical students, residents, and fellows with a foundational list of the most important and influential academic contributions to shoulder arthroscopy.
  18. Environ Sci Pollut Res Int. 2021 Feb 24.
      The ongoing pandemic of the coronavirus disease 2019 (COVID-19) is a global health emergency. Thousands of articles have been published to tackle this crisis. Here, a bibliometric study of the publications in environmental studies has been conducted to identify the emerging research trends in this field in the era of COVID-19. Bibliometric analysis serves as a useful tool to evaluate research productivity and scholarly trends in a field. For this, publications were searched in nine environment-related subject categories indexed in Science Citation Index Expanded (SCI-EXPANDED) database of the Web of Science Core Collection. A bibliometric evaluation of 495 relevant documents was performed to identify various essential research indicators, including the type of the publication, the most prominent journals, subject categories, authors, institutions, and the countries, that contributed significantly to this theme. Major focus of this bibliometric study is to illustrate the potential research hotspots emerged during this pandemic. It has been found that significant amount of research has been conducted for the assessment of environmental quality and its contribution in environmental transmission of COVID-19. In addition to its positive impacts on environment, COVID-19 has contributed indirectly in worsening many environmental threats such as increased exposure to disinfectants and antimicrobials, poor solid waste management, and food insecurity. Researchers have also been focusing on the strategies for the planning of post-COVID-19 cities and buildings and to protect the ecology. This bibliometric study allowed the visualization of research agenda in the field of environmental studies during this pandemic.
    Keywords:  Air; Bibliometrics; COVID-19; Environment; SARS-CoV-2; Water
  19. Arthrosc Sports Med Rehabil. 2021 Feb;3(1): e135-e147
      Purpose: To identify and evaluate the top 50 most-cited articles pertaining to SLAP tears.Methods: The ISI Web of Knowledge database was used to conduct a query for articles pertaining to SLAP tears. Our query was conducted in April 2020 with multiple Boolean operative combinations performed by 2 independent reviewers. Articles on the final list were further reviewed to extract the following data: manuscript title, first author, total citation count, year of publication, citation density since publication, current citation rate since 2013, journal, country of origin, and level of evidence.
    Results: Our initial search yielded 2,597 articles. Within this cohort, the top 50 publications pertaining to SLAP tears were identified that met our search criteria. The top article was cited 802 times while the 50th ranked article was cited 46 times. The average number of citations per publication was 131, whereas the average citation density since year of publication was 7.3. No strong correlations were found between citation density and year published. Twelve journals published articles pertaining to SLAP tears, with Arthroscopy accounting for the greatest number (15 articles, 30%). Most articles were graded with a level of evidence (LOE) of IV (n = 24, 48%), followed by review articles without LOE (n = 8, 16%). Only 2 articles achieved an LOE of I (4%). Articles typically addressed the arthroscopic management (n = 11, 22%), whereas anatomy/classification (n =10, 20%), and outcomes (n = 9, 18%) also were reported.
    Conclusions: This review provides a quantitative analysis of the most-referenced literature pertaining to SLAP tears. This body of knowledge helps surgeons search for literature regarding these injuries and identify trends regarding SLAP tear research.
    Clinical Relevance: This research provides practitioners with an easily accessible and comprehensive collection of the major contributions regarding SLAP tears and offers insight into future areas for research.
  20. Naunyn Schmiedebergs Arch Pharmacol. 2021 Feb 22.
      V-domain Ig suppressor of T cell activation (VISTA) is a transmembrane protein that plays a crucial role in the regulation of antitumor immunity. Therapeutic intervention that inhibits the VISTA pathway constitutes a new approach in the treatment of cancer. The aim of the present study was to provide a bibliometric literature review of VISTA research in the field of cancer. Published articles on the topic were retrieved from the Web of Science Core Collection Database of Hassan II University from the beginning of the database to November 14, 2019. The articles were analyzed and a lot of information was available on the Web of Science, such as the number of citations, the names of the authors, country, publication year, Web of Science categories, and journal. A total of 76 papers (research and review articles) were retrieved from the Web of Science Core Collection Database to introduce VISTA research in cancer topic. All of the articles were published in English during the period between 2011 and 2019; the annual publications number has increased from 1 in 2011 to 22 in 2019. Cancer immunology immunotherapy journal, Cancer immunology research journal, and Cancer research journal, each one has published 3 articles (3.9% of the total publications), the impact factors of the journals ranged from 2.34 to 10.19. The author who has published high number of articles was Noelle RJ with 11 articles; according to the keyword co-occurrence, VISTA was the most frequent keyword with a frequency of 42.1%, followed by immune (36.8%). This is the first work that treats the application of bibliometric methods in VISTA research in the oncology field and represents an important bibliographic source for future studies on the role of VISTA in cancer and immunotherapy of cancer.
    Keywords:  Cancer; Immunotherapy; Tumor; V-domain Ig suppressor of T cell activation; VISTA
  21. J Infect Public Health. 2020 Dec 19. pii: S1876-0341(20)30764-4. [Epub ahead of print]14(3): 311-319
      Infectious diseases remain a complex, recurring, and challenging public health hazard. Coronaviruses have led to multidimensional consequences on health, mobility, and socio-economic conditions. Despite the significance and magnitude of impact from epidemics to the pandemic, literature is sparse on comprehensive coronaviruses related research performance over time. This study aimed at a scientometric evaluation of coronaviruses related literature including COVID-19. Data related to Coronavirus research was extracted from the Web of Science (WoS). All types of publications (28,846) were included and retrieved. To measure the quantity and quality of the publications, "R-Bibliometrix" package was used for detailed analysis exploring a wide range of indicators. Generally, an increasing trend was observed over time led by the USA and China followed by the United Kingdom, Europe, and few other developed countries. The last two decades contributed around 39.5% of documents while only 06 months of 2020 additionally contributed around 46.5% of total documents. Earlier shorter spikes of increased post epidemic publications followed by decreased productivity were detected in the last 2 decades and showed a lack of continuity-'a research epidemic following a disease epidemic'. Articles (53.4%) were the most common publication type. Journal of Virology, British Medical Journal (BMJ), and Virology were leading sources while BMJ, and Lancet showed increased contributions recently. Overall, similar trends of top authors were observed in terms of productivity, impact, collaborations, funding sources, and affiliations with few exceptions mainly from affected regions. Top 20 countries contributed >89% of documents suggesting a lack of global efforts. Networking was found to be mainly among developed nations with limited contributions from resource-limited countries perhaps requiring more cooperation. Recent post-COVID publications rise is highest, unprecedented, and rapidly growing. Authors strongly recommend recent COVID-19 pandemic as a call for continuous, more cooperative, and collective global research.
    Keywords:  Bibliometrics; COVID; Coronavirus; Public health; Web of science
  22. J Am Heart Assoc. 2021 Feb 23. e019005
      Background The purpose of this study was to examine gender differences in authorship of manuscripts in select high-impact cardiology journals during the early coronavirus disease 2019 (COVID-19) pandemic. Methods and Results All manuscripts published between March 1, 2019 to June 1, 2019 and March 1, 2020 to June 1, 2020 in 4 high-impact cardiology journals (Journal of the American College of Cardiology, Circulation, JAMA Cardiology, and European Heart Journal) were identified using bibliometric data. Authors' genders were determined by matching first name with predicted gender using a validated multinational database ( and manual adjudication. Proportions of women and men first, co-first, senior, and co-senior authors, manuscript types, and whether the manuscript was COVID-19 related were recorded. In 2019, women were first authors of 176 (22.3%) manuscripts and senior authors of 99 (15.0%) manuscripts. In 2020, women first authored 230 (27.4%) manuscripts and senior authored 138 (19.3%) manuscripts. Proportions of woman first and senior authors were significantly higher in 2020 compared with 2019. Women were more likely to be first authors if the manuscript's senior author was a woman (33.8% for woman first/woman senior versus 23.4% for woman first/man senior; P<0.001). Women were less likely to be first authors of COVID-19-related original research manuscripts (P=0.04). Conclusions Representation of women as key authors of manuscripts published in major cardiovascular journals increased during the early COVID-19 pandemic compared with similar months in 2019. However, women were significantly less likely to be first authors of COVID-19-related original research manuscripts. Future investigation into the gender-disparate impacts of COVID-19 on academic careers is critical.
    Keywords:  academic cardiology; coronavirus disease 2019; pandemic; productivity; publication; women
  23. Environ Sci Pollut Res Int. 2021 Feb 27.
      Blockchain is a distributed ledger technology that has attracted both practitioners and academics attention in recent years. Several conceptual and few empirical studies have been published focusing on addressing current issues and recommending the future research directions of supply chain management. To identify how blockchain can contribute to supply chain management, this paper conducts a systematic review through bibliometric and network analysis. We determined the key authors, significant studies, and the collaboration patterns that were not considered by the previous publications on this angel of supply chain management. Using citation and co-citation analysis, key supply chain areas that blockchain could contribute are pinpointed as supply chain management, finance, logistics, and security. Furthermore, it revealed that Internet of Things (IoT) and smart contracts are the leading emerging technologies in this field. The results of highly cited and co-cited articles demonstrate that blockchain could enhance transparency, traceability, efficiency, and information security in supply chain management. The analysis also revealed that empirical research is scarce in this field. Therefore, implementing blockchain in the real-world supply chain is a considerable future research opportunity.
    Keywords:  Bibliometric; Blockchain; Literature review; Network analysis; Supply chain management
  24. J Obstet Gynaecol Res. 2021 Feb 25.
      AIM: To evaluate the theme trends and knowledge structure of multifetal pregnancy reduction (MPR)-related literature by using bibliometric analysis.METHODS: Published scientific papers regarding MPR were retrieved from the PubMed database. Data extraction and statistics were conducted using Bibliographic Item Co-Occurrence Matrix Builder (BICOMB). Furthermore, gCLUTO software was used in the study for bi-clustering analysis and strategic diagram analysis.
    RESULTS: According to the search strategy, 906 total papers were included. Among all the extracted MeSH terms, 41 high frequency ones were identified and hotspots were clustered into four categories. In the strategic diagram, research on intrauterine treatment of MPR was most well developed. In contrast, statistical data on the sequelae of fetal reduction surgery and applications of MPR in assisted reproductive technologies were relatively immature.
    CONCLUSION: The analysis of common terms among the high-frequency network terms in multiparous pregnancy reduction can help researchers and clinicians understand the hotspots, key topics, and issues to be discovered on MPR. Research on intrauterine treatment of MPR was most well developed.
    Keywords:  bibliometric analysis; co-word analysis; multifetal pregnancy reduction; selective feticide; strategic diagram
  25. Waste Manag Res. 2021 Feb 24. 734242X21992422
      This work aims to provide the first holistic and deep bibliometric mapping and analysis of the management of plastic waste. Data from the last five years were obtained from a Scopus database search. Relevant information on scientific production, contributions by country and institutions, sources, reference authors, and topic trends were obtained, being analysed using the VOSviewer and Bibliometrix R-package software programs. The results clearly have shown a significant increase in the number of publications over the years, depicting the great influence of the People's Republic of China, since the most relevant authors, publications, and institutes are Chinese. Regarding the topic trends, there is a massive concern about plastic pollution, especially related to plastic in water bodies (mainly microplastics), and the socio-environmental problems which plastic may cause/aggravate, with recycling and the circular economy emerging as possible solutions.
    Keywords:  Bibliometrix; VOSviewer; Waste management; bibliometric analysis; bibliometric mapping; plastic management; plastic residues; plastic waste
  26. AIDS Care. 2021 Feb 24. 1-10
      With the growing number of older people living with HIV, "What is the most effective geriatric care and the research trend of existing literature?" is a compelling question after 30 years since the first paper related to aging and HIV/AIDS published. Our study aims to apply quantitative and qualitative analysis to explore the knowledge gaps and describes the research interest of gerontology research in the field of HIV. A bibliometric analysis was conducted based on the databased of the Web of Science from 1991 to 2019. The major domains of research areas were visualized by using VOSviewer software. Latent Dirichlet Allocation (LDA) was applied to classify the dataset into topics. There was a rising number of publications about this topic over time. Our findings indicated that antiretroviral treatment and evaluating quality of life and harm reduction were the major domains regarding care for OPLWH. In addition, the finding highlights the role of social competence in treatment outcomes. Further research needs to tailor multi-disciplinary programs and flexible interventions to reduce the burden and the mortality rate of HIV/AIDS.
    Keywords:  AIDS; Global analysis; HIV; elderly; lifelong
  27. J Med Internet Res. 2021 Feb 25. 23(2): e23493
      BACKGROUND: Use of patient portals has been associated with positive outcomes in patient engagement and satisfaction. Portal studies have also connected portal use, as well as the nature of users' interactions with portals, and the contents of their generated data to meaningful cost and quality outcomes. Incentive programs in the United States have encouraged uptake of health information technology, including patient portals, by setting standards for meaningful use of such technology. However, despite widespread interest in patient portal use and adoption, studies on patient portals differ in actual metrics used to operationalize and track utilization, leading to unsystematic and incommensurable characterizations of use. No known review has systematically assessed the measurements used to investigate patient portal utilization.OBJECTIVE: The objective of this study was to apply systematic review criteria to identify and compare methods for quantifying and reporting patient portal use.
    METHODS: Original studies with quantifiable metrics of portal use published in English between 2014 and the search date of October 17, 2018, were obtained from PubMed using the Medical Subject Heading term "Patient Portals" and related keyword searches. The first search round included full text review of all results to confirm a priori data charting elements of interest and suggest additional categories inductively; this round was supplemented by the retrieval of works cited in systematic reviews (based on title screening of all citations). An additional search round included broader keywords identified during the full-text review of the first round. Second round results were screened at abstract level for inclusion and confirmed by at least two raters. Included studies were analyzed for metrics related to basic use/adoption, frequency of use, duration metrics, intensity of use, and stratification of users into "super user" or high utilizers. Additional categories related to provider (including care team/administrative) use of the portal were identified inductively. Additional analyses included metrics aligned with meaningful use stage 2 (MU-2) categories employed by the US Centers for Medicare and Medicaid Services and the association between the number of portal metrics examined and the number of citations and the journal impact factor.
    RESULTS: Of 315 distinct search results, 87 met the inclusion criteria. Of the a priori metrics, plus provider use, most studies included either three (26 studies, 30%) or four (23 studies, 26%) metrics. Nine studies (10%) only reported the patient use/adoption metric and only one study (1%) reported all six metrics. Of the US-based studies (n=76), 18 (24%) were explicitly motivated by MU-2 compliance; 40 studies (53%) at least mentioned these incentives, but only 6 studies (8%) presented metrics from which compliance rates could be inferred. Finally, the number of metrics examined was not associated with either the number of citations or the publishing journal's impact factor.
    CONCLUSIONS: Portal utilization measures in the research literature can fall below established standards for "meaningful" or they can substantively exceed those standards in the type and number of utilization properties measured. Understanding how patient portal use has been defined and operationalized may encourage more consistent, well-defined, and perhaps more meaningful standards for utilization, informing future portal development.
    Keywords:  American Recovery and Reinvestment Act; Health Information Technology for Economic and Clinical Health Act; meaningful use; patient portals; patient-generated health data; portal; portal utilization; systematic review
  28. An Pediatr (Barc). 2021 Feb 20. pii: S1695-4033(21)00005-9. [Epub ahead of print]
      To publish articles in prestigious scientific journals is not a simple task, particularly because of three main reasons: the difficulty for designing and performing competitive and high quality research, the high rates of rejection in most high-impact journals, and the absence of systematized training in the methodology of biomedical publications in the curricular programs. If to this is added the progressive complexity of the instructions for authors and the formal requirements that most journals impose, it is logical that there is discouragement among potential authors. On the other hand, the pressure and the demand for authorship of scientific articles to be able to get academic and professional positions of a certain level are increasing. However, what at first glance seems a gloomy perspective, it is not so much if some key aspects related to the structure and writing of manuscripts and the systematics of the editorial process of the journals are known and applied, which, in short, continue being in force since the aphorism «publish or perish» became popular at the beginning of the last century. As described in this article, the steps to follow are straightforward, logical, and interrelated, so getting off to a good start and completing the various stages properly and in the right order always represents a clear advantage in ensuring the final success of having your paper accepted.
    Keywords:  Article; Artículo; Authorship; Autoría; Ethics; Publicación; Publication; Revistas científicas; Scientific journals; Ética
  29. Dev World Bioeth. 2021 Feb 20.
      The bioethics research conducted in Ibero-American countries has been very much restricted to its own realm. The aim of this study was to perform a bibliometric evaluation of bioethics papers by authors affiliated with Ibero-American institutions, and to determine how their work influences global bioethics literature. We performed a literature search in the Web of Science Core Collection (WoS CC) and Scopus. We identified a total of 5,975 documents, of which 84.3% were articles, 11.6% reviews and 4.1% book chapters. The median number of citations per paper was higher in English-language journals. Only 10 articles published between 2010 and 2019 in peer-reviewed bioethics journals and produced exclusively by authors from Ibero-American institutions garnered more than 15 citations. Our study suggests that if researchers from Ibero-American institutions want to influence global bioethical thinking, they must make the required leap in quality to be able to publish in high-quality bioethics and mainstream journals.
    Keywords:  codes of/position statements on professional ethics; position statements (of organizations/groups); research on special populations; scientific research
  30. Surgery. 2021 Feb 18. pii: S0039-6060(21)00020-9. [Epub ahead of print]
      BACKGROUND: Social media has an increasing role within professional surgical practice, including the publishing and engagement of academic literature. This study aims to analyze the relationship between social media use and traditional and alternative metrics among academic surgical journals.METHOD: Journals were identified through the InCites Journal Citation Reports 2019, and their impact factor, h-index, and CiteScore were noted. Social media platforms were examined, and Twitter activity interrogated between 1 January to 31 December 2019. Healthcare Social Graph score and an aggregated Altmetric Attention Score were also calculated for each journal. Statistical analysis was carried out to look at the correlation between traditional metrics, Twitter activity, and altmetrics.
    RESULTS: Journals with a higher impact factor were more likely to use a greater number of social media platforms (R2 = 0.648; P < .0001). Journals with dedicated Twitter profiles had a higher impact factor than journals without (median, 2.96 vs 1.88; Mann-Whitney U = 390; P < .001); however, over a 1-year period (2018-2019) having a Twitter presence did not alter impact factor (Mann-Whitney U = 744.5; P = .885). Increased Twitter activity was positively correlated with impact factor. Longitudinal analysis over 6 years suggested cumulative tweets correlated with an increased impact factor (R2 = 0.324, P = .004). Novel alternative measures including Healthcare Social Graph score (R2 = 0.472, P = .005) and Altmetric Attention Score (R2 = 0.779, P = .001) positively correlated with impact factor.
    CONCLUSION: Higher impact factor is associated with social media presence and activity, particularly on Twitter, with long-term activity being of particular importance. Modern alternative metrics correlate with impact factor. This relationship is complex, and future studies should look to understand this further.
  31. Environ Sci Pollut Res Int. 2021 Feb 23.
      The Web of Science Core Collection platform was used to withdraw the papers included in this study. The studied period comprised from inception till 2018. Trends in research, journals of publication, subject areas of research, keywords most frequently used, countries of publication, international collaboration, and trends of funding research were also analyzed. A total of 3902 articles were published, most of them (52.5%) during the five-year period 2014-2018. The area with the highest number of papers was environmental sciences (41%), followed by energy fuels (16.6%) and engineering environmental (15.7%). "Nitrous oxide emissions" was the most frequent word, followed by "Carbon dioxide emissions" and "Methane emissions". Other words that stood out were "Life cycle assessment", "Climate change" and "Environmental impacts". The United States was the country with the highest productivity (27.9%), followed by China (12.8%) and the United Kingdom (9.6%). There was a concentration of research in recent years, as more than 80% of the papers were published in the last 10 years. The journals that published the largest number of publications were devoted mainly to environmental studies (sciences and engineering), sustainable and green science and technology, energy and fuels, economics, and agriculture. Half of the works were published in Europe and the other half between North America and Asia. Two thirds of the works (67%) were financed compared to a third that were not financed. The percentage of funded works has been increasing over the last decade, which is seen as an indication of the importance of GHGE.
    Keywords:  Funded research; Greenhouse gas emissions; Impact of research; International collaboration
  32. J Adv Nurs. 2021 Mar;77(3): 1325-1334
      AIMS: The purpose of this study is to examine the relationship between keywords in existing global health nursing studies during 44 years (1974-2017) and to develop schematic diagrams of the relationship between these keywords from a macro perspective. It is to identify the trend of the literature in global health nursing field.DESIGN: A descriptive bibliometric analysis of publications in global health nursing.
    METHODS: The keywords from 7,115 articles and literatures were examined using the Text Rank Analyzer via the applied text network analysis with NetMiner 4.0.
    RESULTS: As for global health nursing, keywords with the most frequent appearance and the highest networking degree in centrality were 'study', 'patient', 'nurse', and 'women'. Six central keywords were also found highly related to other keywords: 'global health nursing', 'study', 'patient', 'care', 'nurse', and 'education'. By measuring the degree of keywords connected to other keywords in centrality, six clusters were established. Then, emerging topics assessed by time periods were identified as follows: the beginning phase ('breastfeeding', 'women', and 'children'), the development phase ('quality', 'life', and 'human immunodeficiency virus'), the maturation phase ('mental health', 'depression', and 'global health'), and the expansion phase ('pregnancy', 'palliative care', and 'infectious disease').
    CONCLUSION: The identified trends on this study will help nurse leaders to grasp the trends and insights for global health and to train future nurses to serve clients better in the practice fields.
    IMPACT: Keywords with the highest appearance and centrality in the network were found in the global health articles. The bibliometric analysis showed various subjects according to the following phases: beginning development maturation and expansion. The awareness of the trend change in the global health helps nursing researchers and educators modify the curriculum of global health nursing and train future nurses to be equipped with the global health competencies.
    Keywords:  bibliometrics; global health nursing; research; text network analysis; topic
  33. Lung Cancer. 2021 Feb 05. pii: S0169-5002(21)00042-8. [Epub ahead of print]154 44-50
      BACKGROUND: The impact of medical research is usually judged on the basis of citations in the serial literature. A better test of its utility is through its contribution to clinical practice guidelines (CPGs) on how to prevent, diagnose, and treat illness. This study aimed to compare the parameters of lung cancer research papers with those cited as references in lung cancer CPGs from 16 countries, and the Cochrane Collaboration. These comparisons were mainly based on bibliographic data compiled from the Web of Science (WoS).METHODOLOGY: We examined 7357 references (of which 4491 were unique) cited in a total of 77 lung cancer CPGs, and compared them with 73,214 lung cancer papers published in the WoS between 2004 and 2018.
    RESULTS: References used by lung CPGs were much more clinical than the overall body of research papers on this cancer, and their authors predominantly came from smaller northern European countries. However, the leading institutions whose papers were cited the most on these CPGs were from the USA, notably the MD Anderson Cancer Center in Texas, the Memorial Sloan Kettering Cancer Center, New York, and the Mayo Clinic in Rochester, Minnesota. The types of research cited by the CPGs were primarily clinical trials, as well as three treatment modalities (chemotherapy, radiotherapy and surgery). Genetics, palliative care and quality of life were largely neglected. The median time gap between papers cited on a lung CPG and its publication was 3.5 years longer than for WoS citations.
    CONCLUSIONS: Analysis of the references on CPGs allows an alternative means of research evaluation, and one that may be more appropriate for clinical research than citations in academic journals. Own-country references show the direct contribution of research to a country's health care, and other-country references show the esteem in which this research has been held internationally.
    Keywords:  Altmetrics; Clinical impact; Clinical practice guidelines; Countries; Institutions; Lung cancer; References; Research domains; Research level
  34. Cureus. 2021 Jan 21. 13(1): e12842
      Introduction As the world's largest funding source for biomedical research, the National Institutes of Health (NIH) supports physician-scientists with a discipline-specific R01 grant. Recently, scholarly activity disparities regarding investigator degree and gender have been highlighted in the medical literature among allopathic and osteopathic investigators of various medical backgrounds. We aimed to assess trends in internal medicine NIH R01 grants over the past decade. Methodology Internal medicine R01 funding was retrospectively obtained from a centralized online NIH database encompassing 2008 through 2017. Principal investigators (PIs) were then categorized by gender and academic degree(s). Two-way analysis of variance was used to analyze NIH grant funding trends over the time period studied. Results A total of 5,089 NIH R01s were awarded to internal medicine PIs, with an average value per grant of $469,270. Awardees were predominantly male (71.5%, 3,639/5,089). Most awards were issued to PIs with an MD degree (62.4%, 3,173/5,089), followed by PhD degree (36.3%, 1,845/5,089). DOs accounted for five awards over the time period studied (0.15%). MDs were awarded higher funding than PhDs ($466,494 and $421,576, p < 0.001), and females were awarded higher amounts than males ($462,771 and $444,868, p < 0.001). Investigators who held a second degree received more funding than PIs with a single degree ($476,693 and $439,693, p < 0.001). Conclusion In the decade under investigation, both gender and degree disparities existed within NIH R01 funding for PIs in the field of internal medicine, and osteopathic representation accounted for a paucity of R01 funding.
    Keywords:  grant; internal medicine; investigator; national institutes of health (nih); r01
  35. Scientometrics. 2021 Feb 14. 1-10
      After the initial shock of the early months of the global COVID-19 pandemic, international collaboration in COVID-19 research continues to show aberrant patterns compared to coronavirus research in pre-COVID times. The most affected nations tend to produce the greatest number of coronavirus articles, with output closely coupled to the rate of infection. COVID-19 research has fewer nations and smaller teams than pre-COVID research, a trend which intensifies throughout the pandemic. The United States remains the single largest contributor to the global publication output, but contrary to China's dominance in the initial months of the pandemic, China's contribution falls as the national COVID-19 caseload drops. China-USA collaborations drop as the pandemic continues, perhaps due to China's reduced rate of publication on the topic, and perhaps due to political obstacles, or a combination of these factors.
    Keywords:  COVID-19; Cooperation; International collaboration; Scientific research
  36. J Prosthet Dent. 2021 Feb 17. pii: S0022-3913(20)30803-9. [Epub ahead of print]
      STATEMENT OF PROBLEM: The number and percentage of women chief editors of journals publishing prosthodontic science is unknown.PURPOSE: The purpose of this observational study was to calculate and compare the number and percentage of women and men chief editors of journals publishing prosthodontic science.
    MATERIAL AND METHODS: A list of the dental journals, as ranked by impact factor, was obtained through the Web of Science Journal Citation Reports 2020 using the category "Dentistry, Oral Surgery, and Medicine." Of the 91 journals listed in the Journal Citation Report, 28 published scientific findings related to prosthodontics. The chief editors of these 28 journals were identified, and their gender was recorded. The percentage of women and men chief editors was compared with the percentage of women and men members of the International Association of Dental Research (IADR) and the International College of Prosthodontists (ICP) by using the binomial test (α=.05).
    RESULTS: Of the 28 included journals, a total of 32 chief editors were identified; of whom, 4 (12.5%) were women and 28 (87.5%) were men. There were 7886 members of the IADR who reported their gender; of whom, 3448 (43.7%) were women. There were 906 members of the ICP; of whom, 248 (27.5%) were women. Compared with the percentage of women and men members of the IADR and ICP, women chief editors were significantly underrepresented (P<.001 and P=.039, respectively).
    CONCLUSIONS: The number and percentage of women chief editors of journals publishing prosthodontic science is of concern.
  37. Headache. 2021 Jan;61(1): 143-148
      BACKGROUND: Non-headache literature inevitably influences headache research, but the way this interdisciplinary interaction occurs has seldom been evaluated.OBJECTIVE: Utilizing network analysis techniques within the PubMed Central (PMC) database, we illustrate a novel method by which to identify and characterize the important non-headache literature with significant impact within the headache world.
    METHODS: Using the National Center for Biotechnology Information E-utilities application programing interface and custom backend software, all PMC articles containing the words "headache(s)" and/or "migraine(s)" in the title were identified. This generated a list of "seed articles" to represent the body of primary headache literature. Articles referenced by the seeds were then found, generating the list of articles with one degree of separation from the seeds (first-degree neighbors). This was iterated twice more to find the second- and third-degree neighbors. A directed network graph was generated for each level of separation using these articles and their referential connections. The hyperlink-induced topic search (HITS) and PageRank algorithms were used on these graphs to find the top 50 articles in the network (hub and authority rank via HITS, general rank via PageRank). Removing seed articles from the ranked lists left the influential non-headache articles at each level of separation.
    RESULTS: We extracted 6890 seed articles. The first-, second-, and third-degree models contained 16,451, 105,496, and 431,748 articles, respectively. As expected, most first-degree neighbors were part of the seed group (headache literature). Using HITS, at the second degree, only two seed articles were found in the top 50 hubs (none in the authorities); the majority of non-seed articles were basic neuroscience, involving ion channel function or cell signaling. At the third degree, there were no seeds and all articles involved imaging/structure of brain connectivity networks. PageRank gave more varied results, with 35/50 second-degree articles being seeds, and the remainder a mixture of articles describing rating scales (3), epidemiology/disease burden (3), basic statistical/trial methods (3), and mixed basic science (6). At the third degree, five were seeds; non-seed articles were represented heavily by genomic mapping studies, brain connectivity networks, and ion channel/neurotransmitter studies.
    CONCLUSION: This work demonstrates the value of network citation analysis in the identification of interdisciplinary influences on headache medicine. Articles found with this technique via HITS identified and grouped basic science applicable to headache medicine at the molecular scale (ion channels/transmitters), and whole-brain scale (connectivity networks). Both groups have direct clinical correlates, with the former implicating pharmacological targets, and the latter implicating functional neuroanatomy and pathophysiology of various headache disorders. Likely, in-depth analysis of the whole network (rather than the top 50) would reveal further clusters where the relationship to headache may not be as immediately obvious. This may not only help to guide ongoing work, but also identify new targets where seemingly unrelated work may have future applications in headache management.
    Keywords:  PubMed Central; citation analysis; headache literature; network analysis
  38. BMC Bioinformatics. 2021 Feb 26. 22(1): 95
      BACKGROUND: Numerous efforts have been poured into annotating the wealth of knowledge contained in biomedical articles. Thanks to such efforts, it is now possible to quantitatively explore relations between these annotations and the citation network at large scale.RESULTS: With the aid of several large and small annotation databases, this study shows that articles share annotations with their citation neighborhood to the point that the neighborhood's most common annotations are likely to be those appearing in the article.
    CONCLUSIONS: These findings posit that an article's citation neighborhood defines to a large extent the article's annotated content. Thus, citations should be considered as a foundation for future knowledge management and annotation of biomedical articles.
    Keywords:  Biomedical database; Citation network; Document annotation
  39. Scientometrics. 2021 Feb 14. 1-27
      In China, Prof. Hongzhou Zhao and Zeyuan Liu are the pioneers of the concept "knowledge unit" and "knowmetrics" for measuring knowledge. However, the definition on "computable knowledge object" remains controversial so far in different fields. For example, it is defined as (1) quantitative scientific concept in natural science and engineering, (2) knowledge point in the field of education research, and (3) semantic predications, i.e., Subject-Predicate-Object (SPO) triples in biomedical fields. The Semantic MEDLINE Database (SemMedDB), a high-quality public repository of SPO triples extracted from medical literature, provides a basic data infrastructure for measuring medical knowledge. In general, the study of extracting SPO triples as computable knowledge unit from unstructured scientific text has been overwhelmingly focusing on scientific knowledge per se. Since the SPO triples would be possibly extracted from hypothetical, speculative statements or even conflicting and contradictory assertions, the knowledge status (i.e., the uncertainty), which serves as an integral and critical part of scientific knowledge has been largely overlooked. This article aims to put forward a framework for Medical Knowmetrics using the SPO triples as the knowledge unit and the uncertainty as the knowledge context. The lung cancer publications dataset is used to validate the proposed framework. The uncertainty of medical knowledge and how its status evolves over time indirectly reflect the strength of competing knowledge claims, and the probability of certainty for a given SPO triple. We try to discuss the new insights using the uncertainty-centric approaches to detect research fronts, and identify knowledge claims with high certainty level, in order to improve the efficacy of knowledge-driven decision support.
    Keywords:  Knowledge discovery; Knowledge metrics; SemRep; Semantic predications; Uncertainty
  40. Neurology. 2021 Feb 25. pii: 10.1212/WNL.0000000000011701. [Epub ahead of print]
      OBJECTIVE: To detail the scope, nature, and disclosure of financial conflicts of interest (COI) between the pharmaceutical and medical device industries (Industry) and authors in high-impact clinical neurology journals.METHODS: Using the Centers for Medicare and Medicaid Services Open Payments database (OPD), we retrieved information on payments from Industry to 2,000 authors from randomly selected 2016 articles in 5 journals. We categorized payments by type (Research, General, and Associated Research/institutional), sponsoring entity, and year (from 2013 to 2016). Each author's self-disclosures were compared to OPD-listed Industry relationships to measure discordance. Payments were manually reviewed to identify those from manufacturers of products that were directly tested or discussed in the article. We also quantified the prevalence and value of these nondisclosed, relevant COI.
    RESULTS: Two hundred authors from 158 articles had at least one OPD payment. Median/mean annual payments per author were $4,229/$19,586 (General); $1,702/$5,966 (Research); and $67,512/$362,102 (Associated Research). Most neurologists received <$1,000/y (74.6%, 93.0%, and 79.5% for General, Research, and Associated Research, respectively), but a sizeable minority (>10% of authors) received more than $10,000 per year, and several received over $1 million. Of 3,013 payments deemed directly relevant to the article, 39.7% were not self-disclosed by the authors, totaling $3,379,093 ($1,446,603 General; $25,532 Research; $1,906,958 Associated Research).
    CONCLUSION: Industry-related financial relationships are prevalent among US-based physicians publishing in major neurology journals, and incomplete self-disclosure is common. As a profession, academic and other neurologists must work to establish firm rules to ensure and manage disclosure of financial COI.
  41. Front Psychol. 2020 ;11 643027
      [This corrects the article DOI: 10.3389/fpsyg.2020.01941.].
    Keywords:  Scientometrics; Second language acquisition; document co-citation analysis; language assessment; measurement; review; validity; visualization
  42. Front Psychol. 2021 ;12 569281
      Despite efforts to foster gender equality in academia, women are vastly under-represented in tenured professorships, specifically in STEM disciplines. While previous research investigated structural and organizational barriers for women in academia, we explored professors' subjective view on attributes required before and after reaching tenure. The perspective of professors is needed as they are gatekeepers when it comes to the career advancement of junior researchers. Hence, we interviewed 25 tenured STEM professors in Germany about which attributes they personally consider to be required pre- versus post-tenure and analyzed whether these attributes are associated with gender stereotypes. We found that different attributes are mentioned in the pre- versus the post-tenure career stage and that the required attributes can be associated with gender stereotypes: While agentic-stereotypically male-attributes were mentioned more frequently than communal attributes in the pre-tenure career stage, communal-stereotypically female-attributes were reported slightly more often than agentic attributes after reaching tenure. Based on these novel findings, we discuss important implications for gender research and practice to contribute to more diversity and transparency in academic career advancement.
    Keywords:  STEM; academia; academic career stages; academic gender gap; gender stereotypes
  43. J Strength Cond Res. 2021 Feb 24.
      ABSTRACT: Nuzzo, JL. History of strength training research in man: an inventory and quantitative overview of studies published in English between 1894 and 1979. J Strength Cond Res XX(X): 000-000, 2020-Limited scholarship exists on the history of strength training research. The current review advances existing qualitative and biographical work by inventorying all experimental studies and case reports published before 1980 on the effects of ≥1 week of strength training on human health and function. Data on authors, journals, citations, study samples, training interventions, study outcomes, and study themes were extracted and summarized. Three hundred thirty-nine strength training studies were published between 1894 and 1979. Studies included 14,575 subjects, with 10,350 undergoing strength training. Subjects were usually healthy (81.1% of articles), university students (51.0%), or aged 18-65 years (86.7%). Men comprised 70.0% of subjects. Interventions typically involved isoinertial only (64.6%) or isometric only (35.4%) training. Upper-body interventions were more common (35.4%) than lower-body interventions (27.4%). Duration and frequency of training were typically 4-8 weeks (55.3%) and 3 days per week (39.2%), respectively. Isometric maximal voluntary contractions (54.0%) and one repetition maximum (20.4%) were the most common muscle strength tests. Other common outcomes included limb girths (20.9%) and muscle endurance (19.5%). Common research themes were physiology (54.3%), physical fitness (28.9%), and injury/rehabilitation (20.4%). The 339 studies have been cited 21,996 times. Moritani and deVries' 1979 article on time course of neuromuscular adaptations is the most highly cited (1,815 citations). DeLorme (5 articles and 772 citations), Hellebrandt (4 articles and 402 citations), Rasch (9 articles and 318 citations), and Berger (12 articles and 1,293 citations) made the largest contributions. Research Quarterly published the most articles (27.4%). The history of strength training research is discussed in the context of the results.
  44. Cardiol Young. 2021 Feb 24. 1-5
      BACKGROUND: Manuscripts pertaining to paediatric cardiology and CHD have been published in a variety of different journals. Some of these journals are journals dedicated to paediatric cardiology, while others are focused on adult cardiology. Historically, it has been considered that manuscripts published in journals devoted to adult cardiology have greater citation potential. Our objective was to compare citation performance between manuscripts related to paediatric cardiology and CHD published in paediatric as opposed to adult cardiology journals.METHODS: We identified manuscripts related to paediatric cardiology and CHD published in five journals of interest during 2014. Of these journals, two were primarily concerned with adult cardiology, while the other three focused on paediatric cardiology. The number of citations for these identified manuscripts was gathered from Google Scholar. We compared the number of citations (median, mean, and 25th, 75th, 90th, and 95th percentiles), the potential for citation, and the h-index for the identified manuscripts.
    RESULTS: We identified a total of 828 manuscripts related to paediatric cardiology and congenital heart as published in the 5 journals during 2014. Of these, 783 (95%) were published in journals focused on paediatric cardiology, and the remaining 45 (5%) were published in journals focused on adult cardiology. The median number of citations was 41 in the manuscripts published in the journals focused on adult cardiology, as opposed to 7 in journals focused on paediatric cardiology (p < 0.001). The h-index, however, was greater for the journals dedicated to paediatric cardiology (36 versus 27).
    CONCLUSION: Approximately one-twentieth of the work relating to paediatric cardiology and CHD is published in journals that focus predominantly on adult cardiology. The median number of citations is greater when manuscripts concerning paediatric cardiology and CHD are published in these journals focused on adult cardiology. The h-index, however, is higher when the manuscripts are published in journals dedicated to paediatric cardiology. While such publications in journals that focus on adult cardiology tend to generate a greater number of citations than those achieved for works published in specialised paediatric cardiology journals, the potential for citation is no different between the journals. Due to the drastically lower number of manuscripts published in journals dedicated to adult cardiology, however, median performance is different.
    Keywords:  cardiology; citation; paediatric; performance; publication; studies
  45. J Womens Health (Larchmt). 2021 Feb 24.
      Background: Gender disparities in academic promotion and leadership are well documented. Scholarly impact is essential for promotion. The Hirsch-index (h-index) is a measure of impact using number of publications and citations. We sought to (i) evaluate breast surgery fellowship faculty in North America by academic rank and research impact using the h-index, (ii) determine whether there is a gender difference in scholarly productivity, and (iii) determine the relationship between academic rank, h-index, and gender. Materials and Methods: A retrospective cross-sectional study of h-index and academic rank disparity in breast surgery faculty by gender was performed. We reviewed the faculty of Society of Surgical Oncology-accredited breast surgery fellowships in February 2019. Rank, gender, academic appointment, years in practice, program directorship, National Cancer Institute-designated cancer center association, size of the program, and h-index (via Scopus) were recorded. Univariate and multiple linear regression analyses were performed. Results: Fifty-two programs were identified, and 209 faculty had an h-index. Of them, 69.9% were women and 30.1% were men. h-index increased with academic rank although there was considerable overlap between ranks. Women were underrepresented at the professor level (46.4%), but accounted for the majority of assistant professors (91.5%, p < 0.001), and program directors (70.7%). Men professors had a significantly higher mean h-index than women professors, p < 0.001. However, women associate professors had a higher mean h-index than men, but this did not reach significance. Conclusions: Mean h-index increased with increasing rank among breast surgery faculty for both genders. Average h-index was significantly higher for men professors compared to women professors. No significant gender difference in h-index was found for assistant professors. For associate professors, h-index for women was higher than for men. Women are underrepresented at higher academic ranks despite forming the majority of breast surgical teaching faculty.
    Keywords:  academic rank; gender equity; h-index; professor; promotion
  46. Scientometrics. 2021 Feb 16. 1-10
      This paper comments on the phenomenon of "publish or perish" associated with the current information explosion and its awful consequence: the curse that hangs over academia which dooms it to publish incessantly irrelevant and pointless documents. The overabundance of publications is not justified and is not even necessary in many contexts for personal promotion, and even less for the advancement of science. Therefore, the current role of scientific journals is highly questionable that its aim could be misleading. Huge numbers of articles are published, but they are not read because the aim is principally "publish for publish," or publication for its own sake. The standard corrective tool for improving scientific communication-peer review-cannot function adequately, and biases and perversions are introduced which undermine society's confidence in the scientific enterprise. A dark landscape unfurls itself across the world of scientific information, forcing us to question and improve its current state. Methodologically this paper goes halfway between the essay and the review trying to provoke engaged and useful controversy.
    Keywords:  Peer review; Publish or perish; Saturated edition; Scientific information; Scientific journals