Prolific Journals Research Articles

Global mapping of randomised trials related articles published in high-impact-factor medical journals: a cross-sectional analysis

BackgroundRandomised controlled trials (RCTs) provide the most reliable information to inform clinical practice and patient care. We aimed to map global clinical research publication activity through RCT-related articles in high-impact-factor medical journals over the past five decades.MethodsWe conducted a cross-sectional analysis of articles published in the highest ranked medical journals with an impact factor > 10 (according to Journal Citation Reports published in 2017). We searched PubMed/MEDLINE (from inception to December 31, 2017) for all RCT-related articles (e.g. primary RCTs, secondary analyses and methodology papers) published in high-impact-factor medical journals. For each included article, raw metadata were abstracted from the Web of Science. A process of standardization was conducted to unify the different terms and grammatical variants and to remove typographical, transcription and/or indexing errors. Descriptive analyses were conducted (including the number of articles, citations, most prolific authors, countries, journals, funding sources and keywords). Network analyses of collaborations between countries and co-words are presented.ResultsWe included 39,305 articles (for the period 1965–2017) published in forty journals. The Lancet (n = 3593; 9.1%), the Journal of Clinical Oncology (n = 3343; 8.5%) and The New England Journal of Medicine (n = 3275 articles; 8.3%) published the largest number of RCTs. A total of 154 countries were involved in the production of articles. The global productivity ranking was led by the United States (n = 18,393 articles), followed by the United Kingdom (n = 8028 articles), Canada (n = 4548 articles) and Germany (n = 4415 articles). Seventeen authors who had published 100 or more articles were identified; the most prolific authors were affiliated with Duke University (United States), Harvard University (United States) and McMaster University (Canada). The main funding institutions were the National Institutes of Health (United States), Hoffmann-La Roche (Switzerland), Pfizer (United States), Merck Sharp & Dohme (United States) and Novartis (Switzerland). The 100 most cited RCTs were published in nine journals, led by The New England Journal of Medicine (n = 78 articles), The Lancet (n = 9 articles) and JAMA (n = 7 articles). These landmark contributions focused on novel methodological approaches (e.g. the “Bland-Altman method”) and trials on the management of chronic conditions (e.g. diabetes control, hormone replacement therapy in postmenopausal women, multiple therapies for diverse cancers, cardiovascular therapies such as lipid-lowering statins, antihypertensive medications, and antiplatelet and antithrombotic therapy).ConclusionsOur analysis identified authors, countries, funding institutions, landmark contributions and high-impact-factor medical journals publishing RCTs. Over the last 50 years, publication production in leading medical journals has increased, with Western countries leading in research but with low- and middle-income countries showing very limited representation.

Mapping global research related to international students: a scientometric review

Although international students have been a notable research topic in higher education for more than 100 years, to date only one qualitative literature review has been published on the topic. In order to help researchers better understand the intellectual landscape of global research related to international students, we conducted a quantitative scientometric review of 3685 relevant journal articles published between 1900 and 2018 and indexed in the Web of Science Core Collection. The findings show that the number of articles published in the field has increased rapidly, especially since 2006, and this expansion has been led primarily by Australia, the U.K., and the USA, as these three countries not only produced most of the high-yielding research institutions and productive authors, but also published a majority of the prolific journals. Among the numerous topics discussed in these selected articles, cross-cultural adjustment, mental health problems, second-language acquisition, intercultural development, and student migration were most frequently studied, while social integration, graduate employability, and student satisfaction have emerged as new trends. These results complement the existing qualitative literature review from a quantitative perspective and provide valuable insights into and implications for global research related to international students.

AUTHENTIC LEADERSHIP: SCIENTIFIC PRODUCTION ANALYSIS AND MEASUREMENT SCALES

ABSTRACT Purpose: This paper analyzes the publications on the “authentic leadership” construct, based on systematic literature review and bibliometric analysis techniques, and aims to identify and analyze data regarding the chronology of publications, the identification of the most prolific journals and authors, research approaches, and the existence of authentic leadership measurement/assessment tools and its applications, besides analyzing the construction of these tools. Originality/value: Of the 431 articles analyzed, those dealing with reviews of literature do not present bibliometric data associated with the analysis of the construct measurement instruments. Design/methodology/approach: A literature review was performed systematically, using the query “authentic leadership” on the Academic Search Premier (Ebsco), Scopus, and Web of Science databases, with no starting date delimitation, with the deadline of December 2018, which resulted in the identification of 1390 articles. After eliminating duplicates and three filters, 431 documents remained for analysis. Findings: Three specific construct measurement/assessment tools were identified: the Authentic Leadership Questionnaire (ALQ), the Authentic Leadership Inventory (ALI), and the Authentic Leadership Integrated Questionnaire (AL-IQ). There is a predominance of quantitative studies from 2008, with a wide application of ALQ. Instruments of quantitative measurement of authentic leadership did not emerge, only tools that evidence the presence of authenticity of leaders.

Customer Relationship Management (CRM): A Bibliometric Analysis

This is a bibliometric study of the publications about customer relationship management (CRM), as one of the nowadays most implemented and extended enterprise management software. The objective of this paper is twofold: on the one hand to analyse the impact and focus of influence of the different authors and entities that have been researching on CRM, and secondly to determine (based on the results of the bibliometric study of the publications on CRM) if it may be of interest to investigate and deepen the benefits and impact on CRM results as a modern and leading enterprise management solution. Bibliometrics is a fundamental field of information science that studies bibliographic material quantitatively. This study presents a bibliometric overview of CRM research using the web of science database, identifying the most prolific and influential journals, authors, institutions and countries, considering the period since 1900-2017.

Customer relationship management (CRM): a bibliometric analysis

This is a bibliometric study of the publications about customer relationship management (CRM), as one of the nowadays most implemented and extended enterprise management software. The objective of this paper is twofold: on the one hand to analyse the impact and focus of influence of the different authors and entities that have been researching on CRM, and secondly to determine (based on the results of the bibliometric study of the publications on CRM) if it may be of interest to investigate and deepen the benefits and impact on CRM results as a modern and leading enterprise management solution. Bibliometrics is a fundamental field of information science that studies bibliographic material quantitatively. This study presents a bibliometric overview of CRM research using the web of science database, identifying the most prolific and influential journals, authors, institutions and countries, considering the period since 1900-2017.

Celanese is the ICIS Company of the Year

Off-site construction (OSC) is an innovative and sustainable construction method. One of its critical success factors is the proper management of its supply chain (SC). Recently, significant research attention has been focused on the modelling of OSC-SC to improve its performance and sustainability. However, the literature still lacks a comprehensive review of the modelling studies on off-site construction -supply chain management (OSC-SCM). Therefore, this research contributes by providing a comprehensive and up-to-date mapping and clustering of 309 journal articles on the modelling of OSC-SC to identify its trends and gaps, and hence, highlight future research opportunities. To achieve these objectives, a mixed review method, consisting of scientometric and systematic reviews, is used. The scientometric review identifies the most prolific journals, researchers, co-occurrence network of keywords, and their citation bursts. On the other hand, the systematic review classifies the articles based on OSC type and supply chain (SC) stage. At each SC stage, the articles are further classified based on problem settings and solution methods. The results show that production problems have received the most attention (i.e., by 28% of the included articles), followed by on-site construction (19%), design (13%), and logistics (7%) problems. However, researchers are more inclined to address problems at multiple SC stages (33%) due to the interrelationship between these stages. Besides, the systematic analysis shows that OSC-SC problems have been solved frequently by a variety of solution methods such as optimization (25%), simulation (13%) and building information modelling (BIM) (9.5%). However, researchers tend more to integrate multiple solution methods (35%) to address the complexities of OSC-SC problems. Finally, the included studies are classified based on the three sustainability dimensions. The results show that economic, environmental, and social sustainability dimensions have been considered in previous studies by 72%, 24%, and 4%, respectively. Therefore, the study identifies research gaps at each SC stage of each OSC type to incentivize future studies to consider more environmental and social sustainability factors in OSC-SC models. Since modular integrated construction (MiC) has the highest prefabrication level, this study provides future research directions for sustainable supply chain management (SCM) in MiC. The present research is an important reference guide that helps researchers and practitioners to understand different problem settings and their solution methods in OSC-SCM.

Healthcare marketing: A review of the literature based on citation analysis

This study identifies the principal sources of knowledge in the healthcare marketing field based on the most prolific and influential journals and authors, drawing on a sample of 1,950 articles published in 11 journals from 1987 to 2016. The three most influential journals are the International Journal of Pharmaceutical & Healthcare Marketing, the International Journal of Healthcare Management, and the Academy of Health Care Management Journal. Health Marketing Quarterly is another highly influential and prolific journal. The most prolific authors are Brian Smith, David Loudon, Donald Self, and Robert Stevens. The most influential authors, on the basis of fractional citations, are Philip Brown, Renuka Garg, and Jayesh Aagja. This is the first study to systematically review the burgeoning body of healthcare marketing literature with the aim of mapping the research that has been undertaken in this area. This is by far the most comprehensive review on this topic to date.

The position of Distance Education in a journal network

ABSTRACTOn the occasion of the 40th anniversary of the journal Distance Education (DE), this study explores the position of this journal in a network of open and distance education, educational technology and learning design publications. A citation network analysis was undertaken to explore the scholarly communication network of distance education, using articles published in DE from 1980 onwards (n = 656), alongside references cited in those articles (n = 16,729), as well as articles (n = 6003) and associated references (n = 164,444) published in 22 leading journals indexed in the Web of Science between 2014 and 2019. A distinction is made between a narrower (intra-DE) and a wider (inter-journal) distance education network. The study reveals DE’s relationship to the wider educational technology community over time and identifies the most prolific journals and authors in this network.

The evolution of celiac disease publications: a holistic approach with bibliometric analysis.

Despite the increasing number of publications on celiac disease, there is a lack of studies that made a holistic bibliometric evaluation of the studies on this topic. The purpose of this study is to analyze the publications about celiac disease by using bibliometric methods and this way to demonstrate the celiac disease-related trends, top effective articles, journals, and international collaborations between the countries and institutions. All articles published between 1980 and 2018 on celiac disease were downloaded from Web of Science and analyzed with bibliometric methods. The correlations between economic development and publication productivity of the countries were investigated with Spearman's rank correlation coefficient. Linear regression analysis was used to estimate the number of publications and citations. The literature review showed that there were 6545 articles about celiac disease published between the years 1980 and 2018. The top productive country that produced most publications about celiac disease was the Italy. The most prolific journals were the Journal of Pediatric Gastroenterology and Nutrition and Scandinavian Journal of Gastroenterology. There was a moderate positive significant correlation between the number of publications and gross domestic product (r = 0.639, p < 0.001). Despite the advanced research on the diagnosis, pathophysiology, and treatment of celiac disease, the global research level about the disease is low. Therefore, the international collaboration about the disease should not remain at only regional contexts; the exchange of knowledge and common studies especially in developing or underdeveloped countries should be supported in terms of prevalence and clinic studies.

Systematic literature review of halal food consumption-qualitative research era 1990-2017

PurposeIn view of increasing demand of halal foods and to properly address the needs of various types of consumers, the literary inquiries have sprung in this area since start of twenty-first century. However, the number of papers published in reputed journals is still pegged to the lowest ebb. This paper aims to systematically review all qualitative research papers, published in reputed journals, and to give specific directions to future researchers to move on and explore some other required areas.Design/methodology/approachThe Campbell collaboration systematic literature review technique was adopted as methodology to screen out relevant studies. A total of 11 qualitative studies qualified the set criteria which have used various qualitative methodologies like interviews, focus groups, observations and netnography. The qualitative data were analyzed through nVivo software by adopting Spiggle’s steps of data analysis.FindingsIn these selected qualitative studies, around 24 main themes were extracted in total, out of which four themes were repeatedly discussed in most of these studies. Likewise, the details of geographical location of authors, type of methodology used, religious affiliation of respondents, type of journals, most prolific journals and citations of each paper were worked out and given in the form of result tables. Based on the importance of this fastest-growing global food market, it has been concluded that the qualitative research inquiries are still in infancy in this area, and more papers need to be published in reputed journals.Research limitations/implicationsAs per set criteria, only papers published in quality journals were included in this review; therefore, the main limitation of this review is that it has not included other qualitative papers published elsewhere.Practical implicationsThe future researchers can use the results of this study in setting direction of their research in the area of halal food consumption. These results can be used by academicians to know about the extent of research conducted in this area, whereas marketers can make prudent policies based on these explored areas.Originality/valueIt is claimed to be the first systematic literature review on halal food consumption.

Exploring two decades of research on classroom dialogue by using bibliometric analysis

Classroom dialogue is a commonly used method for teaching and learning, and a close study of dialogue has increasingly become an active field of research. In order to have a comprehensive overview of the field, a bibliometric analysis was conducted on 3914 papers published from 1999 to 2018 retrieved from WoS database in relation to classroom dialogue. Specifically, we analyzed trends in publications and citations, recognized prolific authors, institutions and journals, identified geographical publication distributions, visualized the characteristics of collaboration among authors, institutions, and countries/regions, as well as revealing the evolution of themes over the past 20 years. Findings include, firstly, the fact that publications and citations in relation to classroom dialogue have grown consistently over the past 20 years. Secondly, the USA has contributed dramatically more publications, especially since the year 2012. Thirdly, scientific collaborations in perspectives of country/region, institution and author can be explored by accessing the dynamic social networks. Fourthly, thematic features in relation to research on classroom dialogue were revealed by analyzing keywords, with several recurring keywords being identified throughout the period (e.g. ‘classroom’, ‘discourse’, ‘student’) and at the same time, new keywords have emerged (e.g. ‘technology’, ‘computer-mediated communication’), which reflect the shifting trends in the field. This work is useful in terms of indicating the current status of research to scholars as well as practitioners, enabling them to be more aware of the research hotspots when making decisions about which topic to address.

A literature analysis on anti-vascular endothelial growth factor therapy (anti-VEGF) using a bibliometric approach.

We performed the current study to assess the citation performance of research works on anti-vascular endothelial growth factor (anti-VEGF) therapy. We searched Web of Science (WoS) to identify relevant publications and analyze them with reference to their publication year, journal title, citation count, WoS category, and article type. The bibliometric software (VOSviewer) was used for citation analyses of countries and journals and to generate a term map that visualizes the recurring terms appearing in the titles and abstracts of published articles. The literature search resulted in 7364 articles, with a mean citation count of 26.2. Over half of them (50.2%) were published during the past 5years. Original articles constituted the majority (67.8%). The publications were mainly classified into WoS categories of ophthalmology (43.2%) and oncology (20.6%). The most prolific ophthalmology and cancer journals were Investigative Ophthalmology & Visual Science (7.3%) and Cancer Research (1.4%), respectively. The correlation between journal impact factor and citation count was weak to moderate (for journals with impact factor up to 5 and 10, respectively), and open-access articles had significantly more citations than non-open-access articles (p < 0.001). The frequently targeted tumors by anti-VEGF therapy included metastatic colorectal cancer (196; 49.2 citations per article (CPA)), breast cancers (167; 37.2 CPA), and renal cell carcinoma (122; 38.2 CPA). The frequently targeted eye pathologies were age-related macular degeneration (828; 18.2 CPA), diabetic macular edema (466; 10.8 CPA), and diabetic retinopathy (358; 31.9 CPA). These results indicate that anti-VEGF therapy has a wide range of applications and its publications are highly cited.

Announcing the establishment of QREI Best Paper Award

The very first volume of QREI was published in 1985. I first read the journal in 1987 when I was doing my master degree by research, working on reliability of components subject to mechanical wear. Since then, QREI has been on my watch list. In fact, I always refer my graduate students and Six Sigma trainees who are interested in practical statistical methodologies to look up QREI for useful applications. For more than 30 years, QREI has served as an excellent resource for practitioners of the international quality and reliability community. We are indebted to authors and reviewers who have contributed their ideas and time. It is time to give due recognition to authors who have chosen QREI as the outlet for their outstanding work. Today, QREI has doubled its volume from a quarterly publication to eight issues a year making it one of the most prolific journals in the QRE community. On one hand, it is an indication of its popularity as one of the preferred outlets for practice-oriented papers related to quality and reliability; on the other hand, we also need to assure our readers and contributors that the growth does not compromise the quality of the journal. We are pleased to note that QREI received about 600 submissions annually which, with the help of the editorial team and reviewers, has translated into a strong pipeline of high-quality research papers. We are confident that given the long history of the journal and the high selectivity among larger pool of papers published, the Best Paper Award from QREI will be one of the iconic achievements for researchers in the international QRE community. It will serve as an impetus for more researchers to consider submitting their best work to QREI. In line with the publication objective of QREI, the evaluation criteria will be on relevance and impact to practice, new insights for decision making, novelty of ideas, and last but not least, rigor. While QREI does not emphasize on theoretical development, innovative extension of current methodologies and development of new methodologies will also be highly valued. With about 150 papers published annually, selection of potential papers for the best paper award could be a daunting task. A more efficient process is for reviewers and editors to identify potential papers at the point of acceptance and form a preliminary pool of nominated papers. Each editor will then shortlist up to 5 to 8 papers annually so that there will be about 20 nominations annually. A panel, comprising some editorial board members, will be formed to select the best paper out of the pool of nominated papers. Besides selecting the best paper, up to two honorable mentions will also be selected as this will give due recognition to papers that come close. It also serves as an encouragement for authors who just missed the top spot. Finally, the prize for the award. A 1-year online subscription to the journal and an official Certificate of Award will be awarded to all authors of the best paper. Certificates will also be presented to honorable mentions. Announcement of the 2019 Best Paper Award will be made in an editorial of QREI in 2020. We look forward to your continued support and receiving your good work. The best is yet to be!

The Journal of Horticultural Science and Biotechnology (2008-2017): A Scientometric Study

The Journal of Horticultural Science and Biotechnology is a bimonthly peer-reviewed journal published by Taylor and Francis. The present bibliometric analysis depends on 1059 articles distributed from 2008 to 2017 in 60 issues of the journal. An effort has been made to consider distinctive bibliometric markers, for instance year-wise conveyance of articles, length of the articles, authorship pattern, author productivity, year-wise appearance of references, dissemination of cited references, different forms of resources used and cited by authors in their research work, ranked list of prolific authors, journals and organizations.

Worldwide scientific production in obstetrics: a bibliometric analysis

Randomised clinical trials are considered to be the most reliable study design for assessing the efficacy and safety of health interventions. To analyse worldwide obstetrics research carried out through randomised clinical trials, from 2002 to 2013. A bibliometric analysis was performed. Publications on obstetrics that were published journals indexed in the MEDLINE database from 2002 to 2013 were analysed. The major medical subject headings used in the search were obstetrics, pregnancy complications and obstetrics surgical procedures. The main study outcome was index of research productivity. Our study search strategy yielded a total of 142,659 articles and 9967 clinical trials. The growth rate of scientific production in obstetrics during this period was 55.43% (n = 5094). The growth rate of production of randomised clinical trials in this specialty, meanwhile, was 97.84% (n = 544). Most of the identified authors (n = 22,622, 71.21%) published only one paper during the study period. Patterns of co-authorship among the 20 most productive authors were identified. After applying Bradford's law, six journals in the nucleus (the most prolific journals) were found. Of all the clinical trials in obstetrics published between 2002 and 2013, 10.3% were published in journals belonging to categories other than Obstetrics and Gynecology. The most common research topic in 2002 and 2013 was the use of analgesia and anesthesia in obstetrics. Total scientific production rate in obstetrics increased from 2002 to 2013, especially randomised clinical trials. However, randomised clinical trials continue to represent a small proportion of total production.

Antioxidants: Scientific Literature Landscape Analysis.

Antioxidants are abundant in natural dietary sources, and the consumption of antioxidants has a lot of potential health benefits. However, there has been no literature analysis on this topic to evaluate its scientific impact in terms of citations. This study is aimed at identifying and analysing the antioxidant publications in the existing scientific literature. In this context, a literature search was performed with the Web of Science database. Full records and cited references of the 299,602 identified manuscripts were imported into VOSviewer for bibliometric analysis. Most of the manuscripts were published since 1991. The publications were mainly related to the categories biochemistry/molecular biology, food science technology, and pharmacology/pharmacy. These topics have been prolific since 1990 and before. Polymer science was prolific before, but its publication share declined in the recent two decades. Brazil, China, India, and South Korea have emerged as upcoming major contributors besides USA. Most prolific journals were Food Chemistry, Journal of Agricultural and Food Chemistry, Free Radical Biology and Medicine, and PLOS One. Clinical conditions with high citations included Alzheimer's disease, cancer, cardiovascular disease, and Parkinson's disease. Chemical terms and structures with high citations included alpha-tocopherol, anthocyanin, ascorbate, beta-carotene, carotenoid, curcumin, cysteine, flavonoid, flavonol, hydrogen peroxide, kaempferol, N-acetylcysteine, nitric oxide, phenolic acid, uric acid, vitamin C, vitamin E, selenium, and resveratrol. Citation patterns temporal analysis revealed a transition of the scientific interest from research focused on antioxidant vitamins and minerals into stronger attention focus on antioxidant phytochemicals (plant secondary metabolites).

Global obesity research trends during 1999 to 2017: A bibliometric analysis.

Background:The interest in obesity has considerably increased in the scientific community in the last 2 decades. We present a bibliometric analysis to find out the future research hotspot and trends of obesity.Methods:Data were based on the Science Citation Index Expanded (SCI-E), from the Institute of Scientific Information Web of Science database and the 5-year impact factor of a journal were issued from the Journal Citation Reports (JCR) in 2017. Articles referring to obesity during 1999 to 2017 were concentrated on the analysis by scientific output characters and the frequency of author keywords used.Results:Globally, 50,246 articles meet the inclusion criteria during 1999 to 2017. The cumulative number of publication about obesity followed exponential distribution (R2 = 0.9974) from 2008. USA was the most productive countries in both independent and international collaborative papers, the countries/regions with the highest average Times Cited scores for independent articles was France and The United Kingdom scored the highest in average Times Cited for international collaborative papers. Collaboration among countries, playing an ever-growing role in contemporary scientific research. The 2 most prolific journals are Obesity Surgery and International Journal of Obesity, responsible for 3.95% of the publication.Conclusion:Obesity has been a field of intense research in the last 19 years. By reasonably analyzing the author keywords and the distribution of journals, “bariatric surgery” (especially “sleeve gastrectomy”) and “obese complications” (especially “diabetes mellitus,” “metabolic syndrome,” “depression,” and “polycystic ovary syndrome”) will undoubtedly maintain the hotspots of obesity research in the next few decades.

A comparative quantitative study of utilizing artificial intelligence on electronic health records in the USA and China during 2008\u20132017

BackgroundThe application of artificial intelligence techniques for processing electronic health records data plays increasingly significant role in advancing clinical decision support. This study conducts a quantitative comparison on the research of utilizing artificial intelligence on electronic health records between the USA and China to discovery their research similarities and differences.MethodsPublications from both Web of Science and PubMed are retrieved to explore the research status and academic performances of the two countries quantitatively. Bibliometrics, geographic visualization, collaboration degree calculation, social network analysis, latent dirichlet allocation, and affinity propagation clustering are applied to analyze research quantity, collaboration relations, and hot research topics.ResultsThere are 1031 publications from the USA and 173 publications from China during 2008–2017 period. The annual numbers of publications from the USA and China increase polynomially. JAMIA with 135 publications and JBI with 13 publications are the top prolific journals for the USA and China, respectively. Harvard University with 101 publications and Zhejiang University with 12 publications are the top prolific affiliations for the USA and China, respectively. Massachusetts is the most prolific region with 211 publications for the USA, while for China, Taiwan is the top 1 with 47 publications. China has relatively higher institutional and international collaborations. Nine main research areas for the USA are identified, differentiating 7 for China.ConclusionsThere is a steadily growing presence and increasing visibility of utilizing artificial intelligence on electronic health records for the USA and China over the years. The results of the study demonstrate the research similarities and differences, as well as strengths and weaknesses of the two countries.

Mapping of global scientific research in comorbidity and multimorbidity: A cross-sectional analysis.

BackgroundThe management of comorbidity and multimorbidity poses major challenges to health services around the world. Analysis of scientific research in comorbidity and multimorbidity is limited in the biomedical literature. This study aimed to map global scientific research in comorbidity and multimorbidity to understand the maturity and growth of the area during the past decades.Methods and findingsThis was a cross-sectional analysis of the Web of Science. Searches were run from inception until November 8, 2016. We included research articles or reviews with no restrictions by language or publication date. Data abstraction was done by one researcher. A process of standardization was conducted by two researchers to unify different terms and grammatical variants and to remove typographical, transcription, and/or indexing errors. All potential discrepancies were resolved via discussion. Descriptive analyses were conducted (including the number of papers, citations, signatures, most prolific authors, countries, journals and keywords). Network analyses of collaborations between countries and co-words were presented. During the period 1970–2016, 85994 papers (64.0% in 2010–2016) were published in 3500 journals. There was wide diversity in the specialty of the journals, with psychiatry (16558 papers; 19.3%), surgery (9570 papers; 11.1%), clinical neurology (9275 papers; 10.8%), and general and internal medicine (7622 papers; 8.9%) the most common. PLOS One (1223 papers; 1.4%), the Journal of Affective Disorders (1154 papers; 1.3%), the Journal of Clinical Psychiatry (727 papers; 0.8%), the Journal of the American Geriatrics Society (634 papers; 0.7%) and Obesity Surgery (588 papers; 0.7%) published the largest number of papers. 168 countries were involved in the production of papers. The global productivity ranking was headed by the United States (37624 papers), followed by the United Kingdom (7355 papers), Germany (6899 papers) and Canada (5706 papers). Twenty authors who published 100 or more papers were identified; the most prolific authors were affiliated with Harvard Medical School, State University of New York Upstate Medical University, National Taiwan Normal University and China Medical University. The 50 most cited papers (“citation classics” with at least 1000 citations) were published in 20 journals, led by JAMA Psychiatry (11 papers) and JAMA (10 papers). The most cited papers provided contributions focusing on methodological aspects (e.g. Charlson Comorbidity Index, Elixhauser Comorbidity Index, APACHE prognostic system), but also important studies on chronic diseases (e.g. epidemiology of mental disorders and its correlates by the U.S. National Comorbidity Survey, Fried’s frailty phenotype or the management of obesity).ConclusionsOurs is the first analysis of global scientific research in comorbidity and multimorbidity. Scientific production in the field is increasing worldwide with research leadership of Western countries, most notably, the United States.

Global research trends in West Nile virus from 1943 to 2016: a bibliometric analysis

BackgroundWest Nile virus (WNV) is an emerging infectious disease which is most commonly transmitted to humans through mosquito, and is considered a major public-health problem worldwide. The aim of the current study is to bibliometrically analyze the quantity and quality of publications indexed in Scopus from different countries to reveal the characteristics of global research output regarding WNV.MethodsThis study is a bibliometric analysis based on the Scopus database. This study focused on identifying WNV publication trends with regard to publication year, publication type, prolific countries, language of publication, as well as, prolific journals, citations, and collaboration patterns.ResultsA total of 4729 publications were considered in this study, which were published between 1943 and 2016. The annual quantity of literature published before 2000 followed a low rate of research growth; while the quantity of publications after 2000 were published in a stage of rapid development. The country with the greatest number of publications in WNV research field was the USA with 2304 (48.7%) publications, followed by France with 224 (4.7%) publications, and Canada with 222 (4.7%) publications. Contributions from low- and middle-income countries (LMIC) were considerably small, that is, (n = 519 publications; 11%). All publications related to WNV achieved h-index of 140 and were cited 124,222 times. The median [interquartile range] number of citations per article thus amounts to 9 [2-28]. The USA had the highest h-index of 131. Emerging Infectious Diseases is the most productive journal with 227 articles, followed by Journal of Virology with 162 publications. The result designated that Centers for Disease Control and Prevention was ranked the first in terms of publication output, followed by National Center for Emerging and Zoonotic Infectious Diseases.ConclusionsThere is an obvious trend of WNV research after 2000, and countries with high income have more contributions in WNV research field. The research output is low among LMIC. The USA produced the largest number of publications. The Centers for Disease Control and Prevention obtained the leading position of the institutions in terms of publication output. In general, this study not only presents a full view of global WNV research, but also can contribute for future further research in this field.