Introduction: The publication rate of systematic reviews (SRs) and meta-analyses (MA) has been substantially growing in Ethiopia. However, there is no robust study that systematically characterized these SRs and MA. The objective of this study was to map authors collaboration networks and identify trending research topics and most cited SRs and MA in Ethiopia.
Methods and Materials: SRs and MA published up to December 31, 2021, were searched in PubMed, PsycInfo, EMBASE, and Web of Science databases. We included all SRs and MA based on preclinical, clinical, and public health primary studies associated with the Ethiopian population irrespective of the place of publication and authors affiliation. Full record and cited references meta-data of SRs and MA were extracted from the Web of Science Core Collection database. VOSviewer software was used to perform bibliometric analysis and create, visualize, and explore network maps of authors collaboration, keyword and term occurrences, journals and (co-)citations using the full or binary counting method. The relevance of an item and strength of link between items was measured by their weight (frequencies) and total link strength (TLS) respectively.
Results: In total, 422 SRs and MA were included in our analysis that published by nearly 14 research groups (1,066 authors participated) who affiliated with institutions from 33 countries. The largest number of SRs and MA were published by authors affiliated with institutions in Amhara region. These SRs and MA were published in 160 journals, which most of them published in PLOS ONE and BioMed Central journals. Strong collaboration was observed among authors affiliated with institutions in Ethiopia, the Netherlands, Australia, and Canada. The trending research topics were maternal and child health, infectious disease (except HIV/AIDS), depression and substance use, nutritional problems, HIV/AIDS, hepatitis, and cardiometabolic diseases and risk factors. The most cited SR was published on domestic violence against women in 2015.
Conclusions: In this study, for the first time, we provided a comprehensive summary of active author collaboration networks, trending research topics, and influential SRs and MA to gain a deeper understanding of SRs and MA researches outputs in Ethiopia. We believe our study informs researchers, higher institutions, and policymakers about trends and gaps in preclinical, clinical, and public health studies. National and international authors collaboration should encourage and stakeholders fund researchers to increase the output of primary studies, publication rate of SRs and MA, and broaden research areas to less explored topics.