bims-evares Biomed News
on Evaluation of research
Issue of 2020‒03‒15
23 papers selected by
Thomas Krichel
Open Library Society

  1. FEBS J. 2020 Mar 11.
    Aroeira RI, A R B Castanho M.
      Bibliometric quantification is frequently used as metrics for the evaluation of the scientific performance of researchers and institutions. The researchers' merit is usually assessed by the analysis of quantitative parameters such as the number of publications, the impact factor of journals, the total number of citations, or the h-index, although the limitations in translating these indicators into the impact of the outcome of scientific production are a matter of harsh criticism. To assess, based on factual evidences, the validity of traditional bibliometric analyses to conclude on the impact of papers to advance the state of the art, we carried out an innovative methodology on selected publications (test set). This methodology is based on identifying those citations of the test set papers that truly embed the methods, concepts, or hypotheses to build new knowledge and formulate conclusions. The results show that the percentage of citations that reflect the real impact of the papers of the test set has an average value of 12.4% of total citations and is not related to the impact factor of the journal where the test set papers were published. In conclusion, our analysis demonstrates factually, using experimental data, the total failure of using quantitative bulk citation analyses to conclude on the scientific impact of publications. Only a careful analysis of how the work described in papers was embedded on the subsequent work and/or conclusions of others can tell about the real contribution of a published work to the development of new knowledge and advancement of science.
    Keywords:  impact; metrics; number of citations; research; scientific evaluation
  2. J Exerc Rehabil. 2020 Feb;16(1): 69-77
    Jeon SW, Kim JY.
      Physical activity, a key component of maintaining health, is becoming an essential alternative in reducing medical expenses for the old people. This research was intended to analyze 51 research papers published in the Journal of Exercise Rehabilitation (JER) through semantic network analysis. The subjects of the study were the keywords that the authors of each paper used in journal search sites from 2013 to 2019. The present researcher analyzed the frequency, density, and centrality of the keywords of the indicators through semantic network analysis and then visualized them on the basis of findings using UCINET6 and the NetDraw program. Also, the researcher classified the hidden clusters by CONCOR (Convergence of iterated Correlations) analysis, which is a kind of cluster analysis. As a result, it was found that the keyword with the highest frequency was "exercise," followed by "cognition, "physicalactivity," "old-women," "Korean," "fall," and "training." It was also found that most of the high-frequency keywords, such as "exercise," "cognition," "old-women," "program" and "depression" had high centrality. These keywords were classified into four clusters: (a) mental health research, (b) physical health research, (c) social behavior research, and (d) leisure efficacy research. This suggests that the old people-related research papers published in the JER have derived effective methods of maintaining physical and mental health using scientific exercise programs, and especially address the effects of exercise intervention for old women.
    Keywords:  Journal of Exercise Rehabilitation; Knowledge structure; Physical activity; Semantic network analysis
  3. Sheng Wu Gong Cheng Xue Bao. 2020 Feb 25. 36(2): 241-249
    Wang Y, Zheng C, Li H, Wu H.
      As one of the emerging industries, feed industry not only effectively utilizes existing agricultural resources but also provides a strong material foundation and protection for animal food. In this article, status and trends of biological feed in the world based on bibliometrics were analyzed. Issues including major institutions, international cooperation, status, trends and frontiers were analyzed. These co-countries map and keywords clustering analysis can reveal co-countries and hot spots in this field. These analyses can help the researchers get an overview of this field quickly and accurately.
    Keywords:  bibliometric analysis; biological feed; development trends analysis; patents
  4. Psychol Health Med. 2020 Mar 11. 1-13
    Liu S, Zhang RY, Kishimoto T.
      The popularity of research topics in clinical psychology has always been changing over time. In this study, we use Latent Dirichlet Allocation (LDA), a well-established statistical modeling approach in machine learning, to extract hot research topics in published review articles in clinical psychology. In Study 1, we use LDA to extract existing topics between 1981 to 2018 from the review articles published on three premium journals in clinical psychology. Results provide stable information about all topics and their proportions. In Study 2, we use a dynamic variant of LDA to identify the development of hot topics from 2007 to 2018. Results show that meta-analysis, psychotherapy, professional development, and depression constantly stay as hot topics all over the 12 years. We also find that behavior intervention has a clear rising trend since 2007. Our results provide a comprehensive summary of the popularity of research topics in clinical psychology in the last couple of years, and the results here can help clinical researchers form a structured view of past research and plan future research directions.
    Keywords:  Clinical psychology; LDA Latent Dirichlet Allocation; research trends; topic models
  5. Minerva Med. 2020 Mar 12.
    Edlinger C, Mösenlechner T, Krizanic F, Wernly B, Kretzschmar D, Hoppe UC, Butter C, Neuss M, Noutsias M, Granitz C, Schernthaner C, Wintersteller W, Lichtenauer M.
      BACKGROUND: Up to 50% of patients suffering from acute decompensated heart failure show normal or slightly reduced left ventricular ejection fraction (LVEF). This syndrome, which is known as "heart failure with preserved ejection fraction" (HFpEF) is associated with increasing age. Epidemiological studies could portrait an increasing importance and an even emerging prevalence in the past decades. Still, there is currently no evidenced based medical treatment option available. Our aims were to identify upcoming trends and emerging concepts and to point out important centers in the global research of HFpEF.METHODS: We performed a bibliometric study on current science in the field of HFpEF to identify study characteristics, impact factors and the countries of origin of basic and clinical studies that were published within the years 2009 to 2016. We further prepared density equalizing maps for visualization of the obtained data.
    RESULTS: A total of 5413 studies was screened, of which 794 were found eligible. The scientific output in clinical studies rose from 25 in 2009 to 165 in 2016. Most of the publications had a clinical topic, followed by studies on new imaging techniques. Basic research trials were by far beyond. United States, Japan and Germany were identified as the most important national contributors to global scientific output.
    CONCLUSIONS: This first bibliometric study in the field of HFpEF shows a substantial increase of research within the last decade, mainly in the United States, Japan, and continental Europe. As an onholding therapeutic trend in this field, we identified RAAS-blockade and 5- phosphodiesterase-inhibition.
  6. J Med Internet Res. 2020 Mar 05.
    Linzey JR, Robertson FC, Haider AS, Graffeo CS, Wang JZ, Shasby G, Alotaibi NM, Cohen-Gadol AA, Rutka JT.
      BACKGROUND: Social media use continues to gain momentum in academic neurosurgery. To increase journal impact and engage more broadly, many journals have turned to social media to disseminate research. The Journal of Neurosurgery Publishing Group (JNSPG) established a dedicated, specialized social media team (SMT) in November 2016 to provide targeted improvement in digital outreach.OBJECTIVE: The goal of this study was to examine the impact of the JNSPG social media team as measured by increased engagement.
    METHODS: This study analyzes metrics, including impressions, engagements, retweets, likes, profile clicks, and URL clicks, from consecutive social media posts from the JNSPG's Twitter and Facebook platforms between 2/1/2015 and 2/28/2019. Standard descriptive statistics were utilized.
    RESULTS: Between February 2015 and October 2016, when a specialized SMT was created, 170 tweets (8.1 tweets/month) were posted compared to 3,220 tweets (115.0 tweets/month) between November 2016 and February 2019. All metrics significantly increased, including the impressions per tweet (1,646.3±934.9 vs. 4,605.6±65,546.5, P=.01), engagements per tweet (35.2±40.6 vs. 198.2±1,037.2, P<.001), retweets (2.5±2.8 vs. 10.5±15.3, P<.001), likes (2.5±4.0 vs. 18.0±37.9, P<.001), profile clicks (1.5±2.0 vs. 5.2±43.3, P<.001), and URLs clicks (13.1±14.9 vs. 38.3±67.9, P<.001). Tweets that were posted on the weekend compared to weekdays had significantly more retweets (9.2±9.8 vs. 13.4±25.6, P<.001), likes (15.3±17.9 vs. 23.7±70.4, P=.001), and URL clicks per tweet (33.4±40.5 vs. 49.5±117.3, P<.001). Between November 2015 and October 2016, 49 Facebook posts (2.3 posts/month) were sent compared to 2,282 posts (81.5 posts/month) between November 2016 and February 2019. All Facebook metrics significantly increased, including impressions (5,475.9±5,483.0 vs. 8,506.1±13,113.9, P<.001), engagements (119.3±194.8 vs. 283.8±733.8, P<.001), and reach (2,266.6±2,388.3 vs. 5,344.1±8,399.2, P<.001). Weekend Facebook posts had significantly more impressions per post (7,967.9±9,901.0 vs. 9,737.8±19,013.4, P=.03) and a higher total reach (4,975.8±6,309.8 vs. 6,108.2±12,219.7, P=.03) than weekday posts.
    CONCLUSIONS: Social media has been established as a crucial tool for the propagation of neurosurgical research and education. The implementation of the JNSPG specialized social media team had a demonstrable impact on increasing the online visibility of social media content.
  7. Acta Anaesthesiol Scand. 2020 Mar 09.
    Kampman JM, Hermanides J, Boere PRQ, Hollmann MW.
      BACKGROUND: Different metrics exist to evaluate the impact of a paper. Traditionally, scientific citations are leading, but nowadays new, internet based, metrics like downloads or Altmetric Attention Score receive increasing attention. We hypothesised a gap between these metrics, reflected by a divergence between scientific and clinical appreciation of anaesthesia literature.METHODS: We collected the top 100 most cited and the top 100 most downloaded articles in Acta Anaesthesiologica Scandinavica (AAS) and Anesthesia & Analgesia (A&A) published between 2014-2018. We analysed the relationship between the average number of citations per year, downloads per year and Altmetric Attention Score.
    RESULTS: For both AAS and A&A, a significant correlation between the 100 most cited articles and their downloads (r=0.573 and 0.603 respectively, p<0.001) was found. However, only a poor correlation with Altmetric Attention Score was determined. For the 100 most downloaded articles download frequency did not correlate with their number of citations (r=0.035 and 0.139 respectively), but did correlate significantly with the Altmetric Attention Score (r=0.458 and 0.354, p<0.001).
    CONCLUSION: Highly cited articles are downloaded more frequently. The most downloaded articles, however, did not receive more citations. In contrast to the most cited articles, more frequently downloaded papers had a higher Altmetric Attention Score. Thus, a 'trending' anaesthesia paper is not a prerequisite for scientific appreciation, reflecting a gap between clinical and scientific appreciation of literature.
  8. Crit Care Explor. 2019 Aug;1(8): e0028
    Kaul V, Bhan R, Stewart NH, Behrens DM, Gutman A, Dangayach N, Geisler BP, Carroll CL.
      Our objective was to evaluate the association between traditional metrics such as Impact Factor and Eigenfactor with respect to alternative metrics. The Altmetric Attention Score for the top nine pulmonary and critical care journals was compared with Impact Factor, Eigenfactor, and citations over two time periods (2007-2011 and 2012-2016). There was a significant increase in the Altmetric Attention Score (52 from 2007 to 2011 vs 1,061 from 2012 to 2016; p < 0.001) but no significant differences in Total Citations, Impact Factor, or Eigenfactor. There was a strong positive correlation between citations and Altmetric Attention Score, negative correlations between Eigenfactor and Altmetric Attention Score for most journals, and no clear association between Impact Factor and Altmetric Attention Score. Over time, the digital reach of traditional publications has increased significantly, while no significant increase was noted for the traditional metrics. These findings likely reflect discussions of articles online that are not captured by traditional metrics and hence their impact on the community at large.
    Keywords:  Eigenfactor; Impact Factor; altmetrics; citations; pulmonary and critical care medicine; traditional metrics
  9. Encephale. 2020 Mar 06. pii: S0013-7006(20)30025-7. [Epub ahead of print]
    Pierron J, Dirani EE, Sanchez S, El-Hage W, Hingray C.
      OBJECTIVES: First, the main objective was to describe the evolution of the representation of women at the two main conferences of psychiatry in France-Encephale and French Congress of Psychiatry-from 2009 to 2018, and to compare it to the evolution of the representation of women among French psychiatrists. Second, we aimed to describe this evolution within the themes of general psychiatry, child psychiatry and addictology and compare it to the evolution of the number of adult psychiatrists, child psychiatrists and addictologists in France, and likewise to describe this evolution within the organizing and scientific committees, chairpersons and symposia of pharmaceutical companies at these conferences. We hypothesized that women are underrepresented at French speaking psychiatry conferences and sought to quantify this.METHODS: Programs from the 2009-2018 meetings of the Encephale and the French Congress of Psychiatry were included in analysis. We collected for each intervention information about the sex of the participant, the type of the intervention (i.e., speaker, moderator, chairperson) and its main theme (i.e., general psychiatry, child psychiatry, addictology, pharmaceutical company symposium). We also collected from the National Council of the French Medical Association the number of male and female psychiatrists active in France from 2009 to 2018, and the number of male and female psychiatrists who have validated a specific competence in child psychiatry and addictology. The average proportion of women at the two conferences per year was obtained by weighting the average by the different numbers of speakers at the two conferences. À Chi-squared test was used to compare the evolution of the proportion gap over time.
    RESULTS: The proportion of women speaking at these conferences ranged from 25 % in 2009 to 32 % in 2018. Among French psychiatrists, the proportion of female psychiatrists increased from 46 % to 51 %, with a higher proportion of women since 2016. In that ten year span, the difference between the proportion of females amongst the French psychiatrists and the speakers at these French conferences varied between 21 % in 2009 and 17 % in 2016, with a higher proportion of female psychiatrists registered at the National Council of the French Medical Association than female speakers at these conferences. The proportion of female speakers at these conferences tends to increase more quickly than the proportion of active female psychiatrists. The proportion of women speaking on child psychiatry topics (41-59 %) is much higher for each year than those of women speaking on general psychiatry topics (24-33 %) or on addictology topics (10-39 %). Also, the proportion of women speaking on child psychiatry and addictology topics tends to increase more quickly than the proportion of active female child psychiatrists and addictologists in France, while the proportion of women speaking on general psychiatry topics tends to increase more slowly than the proportion of active female psychiatrists for adults in France. The proportion of female speakers is very low in symposia of pharmaceutical companies (7-24 %), members of organizing and scientific committees (13-33 %) and chairpersons (19-28 %), although it increases sfrom 2009 to 2018.
    PERSPECTIVES: This observation of the underrepresentation of women at French psychiatry conferences could make it possible to achieve greater equity. This count could be continued in the next few years and could raise the question of the inclusion of parity in the policy of psychiatric conferences, both among the speakers and among the scientific and organizational committees. Higher exposure of women to conferences would reduce the Matilda effect, defined by minimizing women's contribution to research.
    Keywords:  Conference; Congrès; Female speaker; Femme; Parity; Parité; Psychiatre; Psychiatry
  10. Food Res Int. 2020 Apr;pii: S0963-9969(19)30818-X. [Epub ahead of print]130 108932
    Sridhar K, Charles AL.
      Food Research International, the peer-reviewed international journal launched in 1992, celebrated its 26 years anniversary in 2018. Therefore, we presented an overview on the trending profile of Food Research International and its scientific achievements from 1992 to 2018 by identifying its trends in impact factor, h-index, journal rank, most cited articles, institutes, and countries. The data were retrieved from the Web of Science Core Collection and Scopus®. Several scientific achievements were observed in publications (a total of 6,751), impact factor (0.63-3.57), and citations (a total of 1,78,770) over the 26-year period. The most cited documents were related to the interdisciplinary research within food science and technology and contributed to strengthen the progress of science within the field. In 2007, a systematic review published in Food Research International explored the understanding of microencapsulation and their applications, which captured the scientific attention on microencapsulation in global research community. The journal published in vitro antioxidant assays that highly contributed to the process and analytical applications in food processing industries. Food Research International reported a good citing (cites given) and cited (cites received) relationship with the leading journals within the field. Brazil (301) was the most productive country with the highest contributions to the journal. Overall, these findings highlighted the evolution, quality, and productivity of the journal and provided an opportunity for early-career researchers to conduct more innovative studies in food science and publish in Food Research International.
    Keywords:  CiteScore and CiteScore rank; Citing and cited journals; Food Research International; Scientific achievements; Web of Science Core Collection
  11. Am J Clin Oncol. 2020 Mar 09.
    Paradis N, Knoll MA, Shah C, Lambert C, Delouya G, Bahig H, Taussky D.
      OBJECTIVE: The objective of this study was to examine the correlation between Twitter mentions and the number of academic citations of radiation oncology articles.MATERIALS AND METHODS: We reviewed all 178 clinical manuscripts of the 2 most important radiation oncology journals and "Brachytherapy," and all clinical manuscripts relating to radiation oncology from the top 10 impact factor oncology journals, published between January and February 2018. We collected the record of citations utilizing Scopus and Google Scholar platforms and the number of times an article was tweeted about using the "Altmetric Bookmarklet." χ test was used to compare distributions between groups and the Pearson coefficient was used for correlations between the Twitter metrics and academic citations.
    RESULTS: Overall, 71% of all articles were tweeted about at least once. There was a significant correlation between the number of tweets and the number of citations in Google Scholar (r=0.55, P<0.001) and in Scopus (r=0.59, P<0.001). The 11% of articles with a prepublication Twitter "buzz" (defined as an article with ≥10 tweets before publication) had 3.6 times more citations in Scopus (mean: 14.8 vs. 4.2, P<0.001) and 2.9 times more citations in Google Scholar (17.8 vs. 6.0, P<0.001) when compared with papers with no "buzz."
    CONCLUSIONS: Presence on Twitter was correlated with the number of academic citations of an article in radiation oncology. This suggests that Twitter is being utilized by the oncology community as a platform to discuss and disseminate high impact scientific articles. The correlation between Twitter and increasing the number of citations of an article through larger dissemination and exposure requires further studies.
  12. Environ Sci Pollut Res Int. 2020 Mar 09.
    Li X, Li Y, Li G.
      Research on the impacts of climate change on water quality helps to better formulate water quality strategies under the challenge of an uncertain future, which is critical for human survival and development. As a result, in recent years, there has been growing attention given to research in the field, and the attention has led to an increasing number of publications, which is why a systematic literature review on this topic has been proposed in the current paper. This study reviewed 2998 related articles extracted from the Science Citation Index-Expanded (SCI-E) database from 1998 to 2018 to analyse and visualize historical trend evolution, current research hotspots, and promising ideas for future research by combining a traditional literature review, bibliometric analysis, and scientific knowledge mapping. The results revealed that the impacts of climate change on water quality mainly included the aggravation of eutrophication, changes in the flow, hydrological and thermal conditions, and the destruction of ecosystems and biodiversity. Further exploration of the influence mechanism of climate change on cyanobacteria is an emerging research topic. Additionally, the water quality conditions of shallow lakes and drinking water are promising future research objects. In the context of climate change, the general rules of water quality management and the scientific planning of land use are of great significance and need to be further studied. This study provides a practical and valuable reference for researchers to help with the selection of future research topics, which may contribute to further development in this field.
    Keywords:  Bibliometrics; Climate change; Hotspots; Prediction; Scientometrics; Water quality
  13. Jpn J Radiol. 2020 Mar 09.
    Moon JY, Yun EJ, Yoon DY, Seo YL, Cho YK, Lim KJ, Hong JH.
      PURPOSE: Alternative metrics (altmetrics) provides a complementary measure of the impact of scientific articles. The aim of this study was to identify and characterize the top 100 articles with the highest Altmetric attention score (AAS) in medical imaging journals.MATERIALS AND METHODS: We searched for AASs articles published in 116 journals in the subject category "Radiology, Nuclear Medicine and Medical Imaging" using the Web of Science. We determined the top 100 articles with the highest AAS using the database, and then analyzed them with regard to the publishing journal, year, country of origin, type of article, subspecialty, main topic, and imaging technique.
    RESULTS: The top 100 articles were published in 18 imaging journals, led by Radiology (47%). These articles were published from 2016 to 2018 (94%). Most of the articles were from the United States (62%) and were original clinical studies (59%). The most common subspecialties and imaging technique of study were neuroimaging (30%) and MRI (35%). The main topics of articles were brain disease and function (30%).
    CONCLUSION: Our study presents a detailed list and analysis of the top 100 articles with the highest AAS in imaging literature, which provides unique characteristics representing the public's attention in this field.
    Keywords:  Bibliometrics; Medical imaging; Publication; Social media
  14. Oncologist. 2020 Mar;25(3): 266-270
    Schneider JA, Miklos AC, Onken J, Gong Y, Calcagno AM, Blumenthal GM, Aragon R, Pazdur R.
      In addition to its primary regulatory role, the Office of Hematology and Oncology Products at the U.S. Food and Drug Administration (FDA) is engaged in many forms of scientific authorship. During the period of 2010 to 2018, FDA oncology staff contributed to 356 publications in the scientific literature. Here, we collaborated with analysts in the Office of Program Planning, Analysis, and Evaluation at the National Institute of General Medical Sciences, National Institutes of Health (NIH), to present a series of analyses aimed at quantifying the characteristics and potential impact of these contributions, as well as characterizing the areas of work addressed. We found that FDA oncology papers are enriched for high-impact publications and have about two times the number of citations as an average NIH-funded paper. Further impact of the publications was measured based on the presence of 65 publications that were cited by guidelines and 12 publications cited by publicly listed clinical trials. The results seen here are promising in determining the impact of FDA oncology publication work but prompt further investigation into longer-term impacts, such as the influence of this work on other regulatory activities at FDA. IMPLICATIONS FOR PRACTICE: This article describes the first comprehensive study of scientific publications produced by U.S. Food and Drug Administration (FDA) oncology staff. The analysis illustrates that staff are highly engaged in publishing in the scientific literature in addition to completing regulatory review work. Publications are generally in clinical medicine, consistent with the large number of medical oncologists working at the Office of Hematology and Oncology Products (OHOP). OHOP publications generally focus either on communicating important regulatory work (approval summaries) or highlighting regulatory science issues to encourage dialogue with the scientific community (commentaries, reviews, and expert working papers). The analysis also suggests that several FDA oncology publications may influence clinical guidelines, but further work is needed to evaluate impact.
    Keywords:  Bibliometrics; Food and Drug Administration; Oncology publications
  15. PLoS One. 2020 ;15(3): e0229790
    Oliveira JF, Pescarini JM, Rodrigues MS, Almeida BA, Henriques CMP, Gouveia FC, Rabello ET, Matta GC, Barreto ML, Sampaio RB.
      BACKGROUND: Science studies have been a field of research for different knowledge areas, and they have been successfully used to analyse the construction of scientific knowledge, practice and dissemination. In this study, we aimed to verify how the Zika epidemic has moulded the scientific articles published worldwide by analysing international collaborations and the knowledge landscape through time, as well as research topics and country involvement.METHODOLOGY: We searched the Web of Science (WoS), Scopus and PubMed for studies published up to 31st December 2018 on Zika using the search terms "zika", "zkv" or "zikv". We analysed the scientific production regarding which countries have published the most, on which topics, as well as country level collaboration. We performed a scientometric analysis of research on Zika focusing on knowledge mapping and the scientific research path over time and space.
    FINDINGS: We found two well defined research areas divided into three subtopics accounting for six clusters. With regard to country analysis, the USA and Brazil were the countries with the highest numbers of publications on Zika. China entered as a new player focusing on specific research areas. When we took into consideration the epidemics and reported cases, Brazil and France were the leading research countries on related topics. As for international collaboration, the USA followed by England and France stand out as the main hubs. The research areas most published included public health-related topics from 2015 until the very beginning of 2016, followed by an increase in topics related to the clinical aspects of the disease in 2016 and the emergence of laboratory research in 2017/2018.
    CONCLUSIONS: Mapping the response to Zika, a public health emergency, demonstrated a clear pattern of the participation of countries in the scientific advances. The pattern of knowledge production found in this study represented varying country perspectives, research capacity and interests based first on their level of exposure to the epidemic and second on their financial positions regarding science.
  16. AIDS Rev. 2020 ;22(1): 34-43
    Tran BX, Nathan KI, Phan HT, Hall BJ, Vu GT, Vu LG, Pham HQ, Latkin CA, H-Ho CS, M-Ho RC.
      Tremendous progress has been made over the past three decades in the fight against the HIV epidemic; however, children experienced substantial physical and psychosocial effects of HIV infection. To inform services and policy development, we analyzed research growth and current trends in studies on children with HIV/AIDS. A total of 17,598 research papers and reviews in English, which were published on Web of Science, were downloaded. VOSviewer was used to generate an author keyword cooccurrence network and a network illustrating the connection among countries by shared coauthorships. Exploratory factor analysis was employed to identify research domains emerging from the abstracts' contents. The number of papers and their impacts had grown significantly in the past decade. The majority of study settings were in African countries. Research topics related to HIV in children were robust in areas of prevention of mother-to-child transmission and HIV and comorbidities treatments. Although psychosocial and behavioral disorders were recognized in previous studies, the number of interventions in these fields is still limited or not sustained. This study presents the global research trends and interests, points out research gaps of available publications and suggests several implications for services and intervention programs for children infected with HIV/AIDS. While preventions of mother-to-child transmission have been extensively studied, more efforts should be made to fulfill the lack of research on young people who are at risk of being infected or who are already infected with HIV. System thinking approach is needed in the design and implementation of future studies.
    Keywords:  Bibliometric; Children; Human immunodeficiency virus; Scientometrics; Services
  17. Dent Traumatol. 2020 Mar 13.
    Liu F, Wu TT, Lei G, Fadlelseed AFA, Xie N, Wang DY, Guo QY.
      BACKGROUND/AIMS: Traumatic dental injuries (TDIs) are considered to be a public dental health problem worldwide. The aim of the current study was to provide the worldwide tendency and perspectives in TDIs in the last two decades via bibliometric analysis.METHODS: ''Tooth injuries'' was searched as the Medical Subject Headings term within PubMed with the date range from 1999 to 2018. Two investigators perused information in the articles according to the inclusion and exclusion criteria. The articles were independently categorized according to the following aspects: i) annual scholarly output; ii) leading countries or regions; iii) leading journals; iv) productive authors; v) citations; vi) study design; vii) distribution of topics; and viii) the type of dentition and TDIs. VOSviewer 1.6.7 and Citespace 5.2 were used for analyzing and visualizing bibliometric networks.
    RESULTS: A total of 2627 articles about traumatic dental injuries were published and indexed in PubMed during the two decades, and the number of publications on traumatic dental injuries was rising in general. The research outputs were mainly concentrated in developed countries and affiliated hospitals of universities. Brazil was the most productive country. The journal Dental Traumatology had the most contributions to the scientific research of traumatic dental injuries. "Case report" was the most frequent type of article (36.50%), followed by cross-sectional studies (19.57%) and case-control studies (13.67%). Most studies focused on the treatment of TDIs (38.94%), especially for avulsion (21.01%), crown fracture (9.71%) and intrusion (5.25%). Permanent teeth (66%) was the dominant dentition.
    CONCLUSION: There is a lack of high quality well-designed studies such as cohort studies. The number of publications on prevention and the primary dentition is disproportionate in relation to their significance.
    Keywords:  PubMed; bibliometric analysis; tooth injuries; traumatic dental injuries
  18. Braz Dent J. 2020 Jan-Feb;31(1):pii: S0103-64402020000100003. [Epub ahead of print]31(1): 3-9
    Estrela C, Pécora JD, Damião Sousa-Neto M.
      The Brazilian Dental Journal (BDJ) was officially launched in 1990, stimulated by the courage and boldness of researchers dedicated to teaching and research in dentistry. The journal was conceived in a worldwide coverage and universal language to allow publication of the results of Brazilian studies, which otherwise would not be accessible to the scientific dental community. In the year we celebrate the thirtieth anniversary of BDJ, this article presents a brief overview of Brazilian dental research and a bibliometric analysis of the articles published in this journal as a contribution to our readers and fellow researchers. The purpose was to identify the mot frequent categories of study, the most published areas of dentistry and BDJ's top 50 most-cited articles in the Scopus and Google Scholar databases. A search was performed on all BDJ online issues published from 1990 to 2019. In this period, BDJ published 1,710 articles. Based on their distribution by category of study, 557 articles were in the basic research/dental materials area, 527 in the basic research/biology area and 280 in the clinical research area. Eight articles were cited more than 100 times in the Scopus database and 266 times in the Google Scholar database. Endodontics was the most published area. This overview of BDJ production over those 30 years allows establishing a profile of the characteristics, impact and trends of the published studies, as well as the journal's contribution to the top 50 most-cited articles in the Scopus and Google Scholar databases.
  19. Eur J Pediatr Surg. 2020 Mar 08.
    Feng X, Martynov I, Suttkus A, Lacher M, Mayer S.
      INTRODUCTION:  Research on esophageal atresia (EA) has been heavily published over the past decades. Herein, we aimed to study the quantity and quality as well as key topics in EA research with regards to global collaborations among countries and authors.MATERIAL AND METHODS:  Publications on EA from 1945 to 2018 were extracted from the Web of Science core collection database. Productivity (quantity) was assessed by the number of publications. Quality was estimated from the number of citations, citation rate per item and year, h-index, and impact index. Collaborative networks were evaluated using VOSviewer. All measures were analyzed for countries, authors, and journals. The 10 most cited original articles between 1969 and 2018 in 5-year intervals (n = 100) were manually screened to assess the key points of EA research.
    RESULTS:  A total of 2,170 publications from 85 countries published in 388 journals were identified yielding 26,755 citations, both significantly increasing over time (p < 0.001). The most productive countries and authors also accounted for high-quality publications and benefited from an active global network. The most productive journals derived from the field of pediatric surgery but accounted only for one-third of EA papers. The best cited journals were unspecific for pediatric surgery. Long-term outcome remained the most important topic in EA research, followed by surgical techniques, epidemiology, associated anomalies, perioperative complications, and postnatal management. In contrast, basic science was underrepresented.
    CONCLUSION:  Over the past seven decades, EA publications increased tremendously. Productiveness and quality benefited from global networking. Long-term outcome remains the key interest of EA research.
  20. Clin Podiatr Med Surg. 2020 Apr;pii: S0891-8422(20)30001-X. [Epub ahead of print]37(2): xv-xvi
    Chang TJ.
  21. Braz Dent J. 2020 Jan-Feb;31(1):pii: S0103-64402020000100010. [Epub ahead of print]31(1): 10-18
    Moraes RR, Morel LL, Correa MB, Lima GDS.
      This study assessed bibliometric characteristics of all articles published in Brazilian Dental Journal (BDJ) in its 30 years of existence (1990-2019) and factors associated with citation rates. A document search was carried out in Scopus in December, 2019 and information about the articles were exported, including citations. Type of study and main subject in each article were categorized. Number of citations was categorized in tertiles. Logistic regression models were used to assess the association between variables related to articles' characteristics and number of citations. In 30 years, 1705 articles were published and 18507 citations received, with average 57 articles and 334 pages published yearly and 10.9 cites/doc. The most frequent types of study were laboratorial (63%), clinical (18.5%), and case reports (11%); the main subjects were dental materials (21.6%), endodontics (19.3%), and oral pathology/stomatology (13.1%). Most articles had origin in Brazil (90%), followed by USA (4.6%) and UK (1.5%). Aside from BDJ, Journal of Endodontics (3.5%) and International Endodontic Journal (2.2%) were journals that most often cited BDJ. Main origins of citations were Brazil (36.7%), USA (10.6%), and India (9%). Older articles had higher odds to be highly cited (12% increase/year), longer articles had lower odds (9% decrease/page). Narrative reviews and epidemiological studies were associated with more citations and systematic reviews with less citations. In conclusion, BDJ covered many subjects and study types in 30 years, showing increased growth in international audience. The journal may be regarded as one of the leading Brazilian journals in dentistry published in English.
  22. World Neurosurg. 2020 Mar 05. pii: S1878-8750(20)30431-9. [Epub ahead of print]
    Panagopoulos D, Karydakis P, Giakoumettis D, Themistocleous M.
      BACKGROUND: There is a vast amount of published articles, centered on brain metastases.OBJECTIVE: To present the 100 most-cited articles dedicated to brain metastasis and to accomplish a broad literature review.
    METHODS: In December 2019, we performed a title- focused search using Thomson Reuters Web of Science database in order to identify the most cited articles centered on brain metastatic disease. Our search query term was based on using the following algorithm: "brain metastases" OR "brain metastasis" OR "brain metastatic disease" OR "cerebral metastases" OR "cerebral metastasis" OR "cerebral metastatic disease". Afterwards, we reviewed the results in order to certify that they were relevant to the purposes of our research protocol. The 100 most cited papers were chosen and further analyzed.
    RESULTS: Our search resulted in 11.579 articles, published from 1975 until the completion of our survey. The most cited article was published by Patchell, RA et al in 1990. The paper has received 1862 citations, with an average 62.07 citations per year, while the last in our list was published by Gaspar, Laurie E., et al, in 2010, with 195 total citations, and an average of 19.50 citations per year. Countries with the most high-cited papers included USA (75 records), followed by Canada (16 records).
    CONCLUSIONS: We discovered the top 100 most-cited articles centered on brain metastasis, all of which exhibit a potentially increased level of interest, as they are meaningful scientific reports. Apart from that, we reviewed the historical development and advances in brain metastasis research and relevant points of interest, alongside with the relevant contributions of different authors, fields of special interest, and countries. A significant proportion of the most cited articles were written by authors whose specialty was not neurosurgery, or by neurosurgeons that were supported by colleagues dedicated in other medical fields. As a consequence, many of these aforementioned articles were not published in neurosurgery- dedicated journals.
    Keywords:  Analysis; Articles; Bibliometric; Brain Metastasis; Citation