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Comparing Bibliometric Analysis Using PubMed, Scopus, and Web of Science Databases
Published on: October 24, 2019
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Exploring PubMed as a reliable resource for scholarly communications services.
Peace Ossom Williamson1, Christian I J Minter2
1Director for Research Data Services, Libraries, University of Texas at Arlington, 702 Planetarium Place, Box 19497, Arlington, TX 76019, peace@uta.edu.
Journal of the Medical Library Association : JMLA
|January 2, 2019
Summary
PubMed Central (PMC) content does not decrease PubMed's reliability, as MEDLINE remains the primary index. PMC serves as an open archive, ensuring quality biomedical literature access.
Area of Science:
- Biomedical Informatics
- Bibliometrics
- Scholarly Communication
Background:
- PubMed is a globally accessible biomedical resource, including MEDLINE and other National Library of Medicine (NLM) resources.
- Growth of PubMed Central (PMC) and public access mandates have influenced PubMed's content composition.
- Recent claims suggest PMC content may be of low quality, potentially impacting PubMed's overall reliability.
Purpose of the Study:
- To evaluate claims regarding the quality of content within PMC.
- To assess the impact of PMC growth on PubMed's reliability and composition.
- To explore PubMed's evolving role in the scholarly communication landscape.
Main Methods:
- Assessed the percentage of MEDLINE-indexed records within PubMed and various PMC subsets.
- Utilized the National Center for Biotechnology Information (NCBI) interface for data retrieval.
- Conducted interviews with a PMC external reviewer and NLM staff for clarification.
Main Results:
- Approximately 91% of PubMed content is MEDLINE-indexed; however, this percentage has slightly decreased with PMC's expansion.
- The decrease is attributed to an increase in non-MEDLINE-indexed journals within PMC, not author manuscripts.
- Author manuscripts in PMC are highly likely (85%) to be from MEDLINE-indexed journals.
Conclusions:
- The distinct scopes of PMC (open archive) and MEDLINE (selective index) explain their content overlap.
- Both resources maintain quality control through dedicated maintenance and facilitation.
- Funding from major grantors serves as a significant component of quality assurance within PMC.
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