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. 2022 Apr 28:13:893121.
doi: 10.3389/fneur.2022.893121. eCollection 2022.

Ischemic Stroke-A Scientometric Analysis

Dominic Millenaar  1 , Andreas Ragoschke-Schumm  2 , Tobias Fehlmann  3 , Maximilian Raible  1 , Piergiorgio Lochner  2 , Michael Böhm  1 , Klaus Fassbender  2 , Andreas Keller  3   4 , Felix Mahfoud  1   5 , Christian Ukena  1
Affiliations

Ischemic Stroke-A Scientometric Analysis

Dominic Millenaar et al. Front Neurol. .

Abstract

Background: Stroke is the second leading cause of death world-wide. A comprehensive scientometric study regarding ischemic stroke research has not been performed yet. This study aims at investigating the global research output on ischemic stroke research.

Methods: All 21,115 articles regarding ischemic stroke were retrieved from the Web-of-Science-Core-Collection and analyzed regarding regional differences, the authors' sex, subtopics of stroke, as well as international research collaborations.

Results: A total of 132 different countries participated, with the USA contributing most publications with 4,614 (21.9%), followed by China with 3,872 (18.3%), and Germany with 1,120 (5.3%). Analyzing the scientific quality of different countries by H-index, the USA ranked first with an H-index of 202, followed by Germany (H-index 135) and the United Kingdom (UK;H-index 129). The most frequently used topic was "Clinical Neurology" with 9,028 publications. Among all first authors attributed to their sex, 32.3% of all first authors were female and 67.7% were male (4,335 vs. 9,097). The proportion of female last authors was comparatively lower at 22.4% (3,083 publications) compared with 77.6% male authors (10,658 publications). There was a broad network of international collaborations.

Conclusions: Research in ischemic stroke has substantially increased over time. Scientists from the USA have the highest number of publications, followed by China and Germany. Measured by the H-index, the USA held the highest publication quality, followed by Germany and the UK. The scientific landscape was male-dominated with 67.7% of all first authors being male. Worldwide international collaborations play a major role in ischemic stroke research.

Keywords: citation analysis; hemorrhagic; ischemic; research; stroke.

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Conflict of interest statement

DM has received honoraria from Bayer, Boston Scientific, and Daiichi Sankyo. MB receives honoraria for lectures and scientific advice from Abbott, Astra-Zeneca, Boehringer-Ingelheim, Medtronic, Novartis, Servier, and Vifor. FM has received scientific support and speaker honoraria from Bayer, Boehringer Ingelheim, Medtronic, and ReCor Medical. CU received scientific support and speaker honorarium from Bayer, Boehringer-Ingelheim, Medtronic Inc., Recor Medical, and Pfizer. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
Flow chart of all included articles according to the PRISMA guidelines.
Figure 2
Figure 2
Institute heatmap of the world visualizing all research articles regarding ischemic stroke world-wide. The color intensity proportionally represents the number of publications per institute. Map data by Google [map-data, google, inegi, orion me (source https://www.google.com/maps/)].
Figure 3
Figure 3
Global distribution of number of publications and H-index. World map showing the number of publications (A) and the H-index (B) of research in ischemic stroke. The legend on the right side codes the color intensity of the map.
Figure 4
Figure 4
Chord diagram of international collaborations. Visualization of all countries with international collaborations sorted by frequency of global collaboration. The connection chords of the chord diagram reflect the frequency of joint publications.
See this image and copyright information in PMC

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