A bibliometric study of scientific literature on the dietary therapies for epilepsy in Scopus

Global research trends on diet and nutrition in Crohn’s disease

BACKGROUND

Crohn’s disease represents a challenge for patients concerned with the modified diet regimen as well as practitioners who seek the best nutritional therapy. Crohn’s disease can alter the body’s ability to digest food and to absorb nutrients, resulting in severe vitamin deficiencies, malnutrition and sometimes life-threatening complications. However, a comprehensive bibliometric analysis is lacking to map the current links between nutrition and Crohn’s disease in terms of the number of citations, geographic distribution and growth trends of publications.

AIM

To introduce the current state of research as well as hotspots in the field of nutrition and Crohn’s disease from a bibliometric standpoint.

METHODS

We searched the Scopus database and selected the relevant literature on nutrition and Crohn’s disease that met the inclusion criteria. We analyzed the publication trends and research hotspots by using video object segmentation viewer software.

RESULTS

We included 1237 publications. The number of documents published each year has increased steadily. The United States and the University of Otago, Christchurch, have had the highest productivity, with 208 (16.81%) and 29 (2.34%) documents, respectively. The “role of exclusive enteral nutrition for complicated Crohn’s disease” and “manipulation of the gut microbiota as a key target for Crohn’s disease” were the major research areas in 2016-2021, and they could be extensively investigated in the future. Meanwhile, research on “malnutrition in patients with Crohn’s disease” appeared to be an area that attracted more research attention before 2016.

CONCLUSION

This is the first bibliometric analysis to map the knowledge structure and trends regarding nutrition in Crohn’s disease research over the past two decades. The results provide a comprehensive summary and identification of the frontiers of nutrition and Crohn’s disease-related research, which may be used as a resource by researchers in the field.

Bibliometric mapping of the landscape and structure of nutrition and depression research: visualization analysis

BACKGROUND

Numerous epidemiological studies have examined the relationship between dietary intake of specific foods or nutrients and the incidence of depression and have noted that nutrition has a significant impact on mental health. Therefore, the purpose of this study is to assess the state of research, the frontiers of research, and development trends in the field of nutrition and depression using bibliometric and visual analysis.

METHODS

We collected publications on the topic of nutrition and depression from Scopus between 2002 and 2021. Subsequently, we utilized VOSviewer 1.6.18 and Microsoft Excel 2013 to perform bibliometric analysis and visualization. Bibliometric analysis involves retrieving documents from a singular database, such as SciVerse Scopus or Web of Knowledge, and subjecting them to quantitative and qualitative analysis. Notably, gray literature is not considered in bibliometric analysis.

RESULTS

A total of 2171 publications on nutrition and depression were found between 2002 and 2021, namely 1855 (85.44%) original articles, 190 (8.75%) reviews, 38 (1.75%) letters, and 88 (4.05%) other types of publications. The most productive country was found to be the USA (n = 726; 33.44%), followed by Australia (n = 172; 7.92%), the United Kingdom (n = 158; 7.28%), China (n = 132; 6.08%), and Canada (n = 131; 6.03%). The remaining publications were from other countries (n = 852; 39.25%). According to the citation analysis, the retrieved papers were cited on an average of 26.6 times and had an h-index of 105 with 57,781 citations. The most frequent terms on the map include those related to (a) fatty acid links to depression and brain inflammation, (b) depression and eating disorders, and finally, (c) adherence to the Mediterranean diet and risk of depression.

CONCLUSIONS

The current study was the first novel bibliometric analysis of nutrition and depression research that used data extracted from Scopus for visualization network mapping. In recent years, the theme "Mediterranean diet adherence and risk of depression" has been identified more frequently, indicating that studies in this field have garnered considerable attention and reflect the most recent scientific advances. Researchers should continue to investigate nutrition and depression, and we believe this study provides significant information for researchers, nutritionists, and clinicians.

Bibliometric analysis of global research profile on ketogenic diet therapies in neurological diseases: Beneficial diet therapies deserve more attention

Background

The protective effects of Ketogenic Diet Therapies (KDTs) on neurological diseases have been extensively studied over the past two decades. The purpose of this study was to quantitatively and qualitatively analyze the publication of KDTs in the neurological field from 2000 to 2021.

Methods

A literature search was performed on June 7th, 2022, using the search terms: (("ketone" OR "ketogenic" OR "*hydroxybuty*") AND ("neuro*")) in the WoSCC database. Collected data were further analyzed using VOSviewer, CiteSpace and other online bibliometric websites. The annual publication volume and citation trends were summarized. The collaborations among highly cited countries, institutions, authors and journals were visualized. The co-citation analysis of highly cited references and journals were also visualized. Moreover, the research focuses and fronts were revealed by co-occurrence analysis and burst keywords detection.

Results

A total of 2808 publications with 88,119 citations were identified. From 2000-2021, the number of publications and citations presented rising trends. The United States was the country with an overwhelming number of publications and cited times. Johns Hopkins University was the most contributory institution. Kossoff Eric H was the author with the largest number of publications. And Epilepsia was both the largest publisher and the most frequently cited journal. The keywords of intense interest involved "Modified Atkins Diet", "Temporal Lobe Epilepsy", "Alzheimer's Disease", "Parkinson's Disease", "Cerebral Blood Flow", "Neuroinflammation", "Oxidative Stress", "Metabolism" and "Mitochondria".

Conclusion

We presented the global trend of KDTs in neurological diseases and provided important information for relevant researchers in a bibliometric way. This bibliometric study revealed that treating epilepsy, neuroprotection and functional effects of KDTs on mitochondria and oxidative stress have been the spotlight from 2000 to 2021. These have emerged as the basis for transformation from basic research to clinical application of KDTs.

The Use of Berberine in Diabetes and Metabolic Syndrome: Two Sides of the Same Coin. A Bibliometric Analysis

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The increased prevalence of obesity, metabolic syndrome and type 2 diabetes has prompted scientists to look for new active and safe molecules that may help the prevention of metabolic disorders: hyperglycemia, insulin-resistance and dyslipidemia. Berberine is an alkaloid compound derived from plants, and it is largely used in traditional Chinese medicine. The aim of this study is to investigate in SCOPUS and Web of Science (WOS) databases how the scientists focused on the use of berberine against metabolic disorders, in human subjects. We carried A bibliometric analysis of scientific literature and performed 2 searches: 1) “Berberine” AND “Diabetes” AND “Diabetes Type 2”, 2) “Berberine” AND “Metabolic Syndrome”, both in ARTICLE (Title/Abstract/Keyword) with a time limitation of 1st January, 2000 through 31st December, 2018, with the filter on “HUMAN” AND/OR “HUMANS”. The research sorted out 500 papers, finding about 300 (60 %) in the first search definition and 200 (40 %) in the second. The refined research sorted out 46 papers regarding the use of berberine in diabetes, and 40 articles on the use of the alkaloid compound in metabolic syndrome. For both topics, we found increasing interest between 2008 and 2009, with citation trends in a constant crescendo in the overall period studied. These findings underlined that berberine is a safe and interesting botanical compound, especially against chronic-metabolic disorder that affects billions of people globally, and emphasized that scientists are interested in searching for long-term therapies that show no major adverse effects.

Global naturopathy research as reflected by Scopus during 2000-2019

Purpose

The purpose of this study is to analyze research output in the naturopathy field at the global level and to examine the various trends in scientific literature available on naturopathy using bibliometric analysis.

Design/methodology/approach

The data was collected from the SciVerse Scopus database published from 2000 through 2019. The search was conducted using Medical Subject headings entry terms, i.e. “Naturopathy” OR “Naturopathic Medicine” using the “Document” search option. The search results comprised of documents that had these above search terms in their article title, abstract and keywords. The retrieved documents were then analyzed concerning different parameters like the growth of publications, authorship patterns, productive countries and institutions, highly cited papers, top prolific authors, funding agencies and document types.

Findings

The results of this study reveal that a total of 1,099 documents were published during 20-year time span. The most preferred publication type is research articles 683 (62.14%). Germany, USA, Australia, India and Canada were the most productive countries in terms of the number of scientific documents. The findings also show that the most preferred journal in the field of naturopathy is MMW Fortschritte der Medizin, with 115 documents followed by Journal of Alternative and Complementary Medicine with 58 documents. In contrast, the journal BMC Complementary and Alternative Medicine had the highest citations per paper (17.85). For the 20-year study period, the average value for the degree of collaboration was calculated as 0.57, indicating 54% of the total publications in naturopathy were multi-authored. The value of the collaboration coefficient (CC) signifies the levels of multi-authored papers. CC was highest in the year 2019 (0.55) indicating that the publications were contributed in collaboration rather than in isolation and the number of multi-authored/mega-authored papers outnumbered the single authors in the collection of all authors in the year 2019. Bastyr University, USA was the most productive Institution. Journal articles were the most preferred form of publication.

Practical implications

This study traces various trends in the research behavior and preferences of researchers in the field of naturopathy. It thus can be of immense help to identify strong areas in naturopathy research. Further, this study will help the librarians to identify the core/preferred journals in naturopathy. 

Originality/value

This paper makes an endeavor to carry an extensive bibliometric study that provides an overview of emerging trends in naturopathy research.

Blue Economy and Coastal Tourism: A Comprehensive Visualization Bibliometric Analysis

This paper aims to analyze the scientific production of the blue economy and coastal tourism research fields to identify research topics and publication patterns. Accordingly, bibliometric analysis was selected as a quantitative meta-analysis literature review method. Scopus was the main database for extracting the scientific production in blue economy and coastal tourism. Various bibliometrics analysis techniques were used to analyze 476 and 49 publications in blue economy and coastal tourism, respectively. The main results are summarized as follows: (i) the number of publications in the blue economy scientific sector has increased significantly, and (ii) contrarily, a relatively small body of blue economy literature is concerned with the coastal tourism sector despite its significant role in the blue economy.

Resources for forwards citation searching for implementation studies in dementia care: A case study comparing Web of Science and Scopus

BACKGROUND

Forwards citation searching is a valuable method for finding relevant studies in reviews where concepts are not clearly defined. Scopus and Web of Science can both be used for forwards citation searching but there is little evidence comparing the resources for this purpose.

METHOD

104 source records relevant to a scoping review of implementation and dissemination strategies in dementia care were checked for inclusion on Web of Science and Scopus. The number of citing references was recorded. Where citing references appeared unique to one of the resources, they were checked for inclusion on the other resource to assess the performance of citation links.

RESULTS

1397 citing references were returned by Scopus and 1010 were returned by Web of Science. For the unique citing references returned by Web of Science (n = 52), 36 were subsequently found to be on Scopus but had failed to be picked up as citing a source record. Of the unique citing references returned by Scopus (n = 355), 83 were found to be on Web of Science but had failed to be picked up as citing a source record. 26 additional relevant records were identified for the review by forwards citation searching. All were found on Scopus; six would have been missed by searching Web of Science alone.

CONCLUSION

Citation searching using Scopus alone would have found all additional relevant studies for the review. Both Scopus and Web of Science failed to return all citing references from the source records, even where they were present on the database, indicating poor links between citations.

The Impact of the University Classroom on Managing the Socio-Educational Well-being: A Global Study

The university learning classroom, in addition to a space for activities and architectural object, has a direct impact on the academic motivation, well-being and social relationships of the students. Thus, the link between the university classroom and the management of the socio-educational well-being of the student, in accordance with the principles of well-being theory, is a challenge that the current university must manage. The progress of worldwide research on this topic has been studied during the period 2004-2018. For this aim, a bibliometric study of 1982 articles has been applied. The results provide data of the scientific productivity of the journals, authors, institutions and countries that contribute to this research. The evidence reveals growing interest, especially in the last six years. The main category is Social Sciences. The most productive journals are Computers and Education, American Journal of Pharmaceutical Education, and Theory into Practice. The author with most articles is Reddy, from Rutgers University. The most productive institution is the University of Virginia. The United States is the country with most academic publications, citations and with most international collaborations in its works. Worldwide research has followed an increasing trend, with optimum publication levels in latest years.

Indispensable Amino Acid-Deficient Diets Induce Seizures in Ketogenic Diet-Fed Rodents, Demonstrating a Role for Amino Acid Balance in Dietary Treatments for Epilepsy

Background

Low protein amounts are used in ketogenic diets (KDs), where an essential (indispensable) amino acid (IAA) can become limiting. Because the chemically sensitive, seizurogenic, anterior piriform cortex (APC) is excited by IAA limitation, an imbalanced KD could exacerbate seizure activity.

Objective

We questioned whether dietary IAA depletion worsens seizure activity in rodents fed KDs.

Methods

In a series of 6 trials, male rats or gerbils of both sexes (6-8/group) were given either control diets (CDs) appropriate for each trial, a KD, or a threonine-devoid (ThrDev) diet for ≥7 d, and tested for seizures using various stimuli. Microchip analysis of rat APCs was also used to determine if changes in transcripts for structures relevant to seizurogenesis are affected by a ThrDev diet. Glutamate release was measured in microdialysis samples from APCs during the first meal after 7 d on a CD or a ThrDev diet.

Results

Adult rats showed increased susceptibility to seizures in both chemical (58%) and electroshock (doubled) testing after 7 d on a ThrDev diet compared with CD (each trial, P ≤ 0.05). Seizure-prone Mongolian gerbils had fewer seizures after receiving a KD, but exacerbated seizures (68%) after 1 meal of KD minus Thr (KD-T compared with CD, P < 0.05). In kindled rats fed KD-T, both counts (19%) and severities (77%) of seizures were significantly elevated (KD-T compared with CD, P < 0.05). Gene transcript changes were consistent with enhanced seizure susceptibility (7-21 net-fold increases, P = 0.045-0.001) and glutamate release into the APC was increased acutely (4-fold at 20 min, 2.6-fold at 60 min, P < 0.05) after 7 d on a ThrDev diet.

Conclusion

Seizure severity in rats and gerbils was reduced after KDs and exacerbated by ThrDev, both in KD- and CD-fed animals, consistent with the mechanistic studies. We suggest that a complete protein profile in KDs may improve IAA balance in the APC, thereby lowering the risk of seizures.

Worldwide research productivity in the field of spine surgery: a 10-year bibliometric analysis

PURPOSE

Bibliometrics is increasingly used to assess the quantity and quality of scientific research output in many research fields worldwide. However, the bibliometric studies in the field of spine surgery are scarce. This study aimed to evaluate the worldwide research productivity in the field of spine surgery using bibliometric methods and to provide an insight into the spine research for surgeons and researchers.

METHODS

Articles published between 2004 and 2013 were retrieved using the Scopus database in 5 spine journals, including Spine, European Spine Journal, The Spine Journal, Journal of Neurosurgery: Spine, and Journal of Spinal Disorders and Techniques. The number of articles, trend of publications, countries' contribution and h-index, authorship, subspecialty, funding source, journal pattern, institutions, and top cited articles were analyzed.

RESULTS

A total of 13,115 publications were identified in the database of Scopus from 2004 to 2013. The time trend of the number of articles showed a significant increase of 1.9-fold between 2004 and 2013 (p = 0.000). The largest number of articles in the field of spine surgery was from United States (39.17%), followed by Japan (10.74%) and China (8.62%). United States also have the highest h-index (106), followed by Canada (60) and United Kingdom (54). China (p = 0.000) and South Korea (p = 0.000) have a significantly increasing trend of contribution proportion to the world spine production over time in years, but h-index was still low (39 and 38, respectively). Spine published the highest number of articles (45.44%), followed by European Spine Journal (21.43%) and Journal of Neurosurgery: Spine (13.32%). The most productive institutions were University of California, San Francisco (1.98%), followed by Thomas Jefferson University (1.61%) and University of Toronto (1.41%).

CONCLUSIONS

There has a rapid increase of scientific research productivity in the field of spine surgery during the past 10 years. United States has special contributions to the body of spine publications. China and South Korea have increasing contributions to the field of spine surgery.

Bibliometric profile of the global scientific research on autism spectrum disorders

BACKGROUND

Autism spectrum disorders (ASD) are a group conditions classified as neuro-developmental disorders. Research activity on ASD is important for all countries since such disorders have both social and health consequences. The objective of this study was to analyze research output on ASD during the period 2005-2014.

METHODS

All articles relevant to ASD plus all articles published in autism journals were retrieved using Scopus database. VOSviewer software was used to create density and network visualization maps. Bibliometric indicators were investigated by analyzing annual research output, languages, countries, institutions, journals, title terms, highly cited articles, and co-authorship relations.

RESULTS

A progressive annual growth of ASD research was observed from 2005 to 2014. During this period, a total of 18,490 articles were retrieved. The majority of these articles was published in Journal of Autism and Developmental Disorders with 48,416 citations and an average citation of 23.59 citations per article. The countries that published the largest number of articles were the United States (US) (n = 8594; 46.48 %), United Kingdom (n = 2430; 13.14 %) and Canada (n = 1077; 5.8 %). International collaborations produced 30.18 % of the articles published by top 10 productive countries. King's College London (UK) ranked first in number of publications and total citations. The top 10 list of productive institutions was dominated by US academic and research institutions. More than half of the highly cited articles were in the field of molecular genetics. Articles with more than 50 citations were published mainly by authors from USA, UK and Canada.

CONCLUSIONS

There is a worldwide growth of publications on ASD led by countries in Northern America and Europe. Retrieved articles were published in a wide range of journals. Molecular genetics of ASD is the primary hot topic on ASD. For some leading countries, intra country collaboration is dominant.