Semantic refinement and error correction in large terminological knowledge bases
Data & Knowledge Engineering
Consistency across the hierarchies of the UMLS semantic network and metathesaurus
Journal of Biomedical Informatics - Special issue: Unified medical language system
Structural group auditing of a UMLS semantic type's extent
Journal of Biomedical Informatics
A review of auditing methods applied to the content of controlled biomedical terminologies
Journal of Biomedical Informatics
Structural group-based auditing of missing hierarchical relationships in UMLS
Journal of Biomedical Informatics
The Neighborhood Auditing Tool: A hybrid interface for auditing the UMLS
Journal of Biomedical Informatics
Auditing complex concepts of SNOMED using a refined hierarchical abstraction network
Journal of Biomedical Informatics
Auditing concept categorizations in the UMLS
Artificial Intelligence in Medicine
A RELATIONSHIP-CENTRIC HYBRID INTERFACE FOR BROWSING AND AUDITING THE UMLS
Journal of Integrated Design & Process Science
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Auditing healthcare terminologies for errors requires human experts. In this paper, we present a study of the performance of auditors looking for errors in the semantic type assignments of complex UMLS concepts. In this study, concepts are considered complex whenever they are assigned combinations of semantic types. Past research has shown that complex concepts have a higher likelihood of errors. The results of this study indicate that individual auditors are not reliable when auditing such concepts and their performance is low, according to various metrics. These results confirm the outcomes of an earlier pilot study. They imply that to achieve an acceptable level of reliability and performance, when auditing such concepts of the UMLS, several auditors need to be assigned the same task. A mechanism is then needed to combine the possibly differing opinions of the different auditors into a final determination. In the current study, in contrast to our previous work, we used a majority mechanism for this purpose. For a sample of 232 complex UMLS concepts, the majority opinion was found reliable and its performance for accuracy, recall, precision and the F-measure was found statistically significantly higher than the average performance of individual auditors.