The definition of biomedical research subfields with title keywords and application to the analysis of research outputs

Abstract

Authors of biomedical research papers publish most of them in journals that are not specialist in their subfield. So a filter to retrieve papers in a subfield from a database must be based primarily on title keywords although the names of specialist journals can also be used. In studies to compare outputs in different subfields, the subfield filters must be calibrated to allow for their lack of both recall and precision. Two methods are described, and the results used to construct an output portfolio analysis. The importance of title keywords is illustrated by analysis of: output of different countries as a fraction of world total for a subfield; quality and research level of journals used by researchers; and the numbers of citations received by their papers. New graphical methods of presentation of these indicators are used.

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