BACKGROUND
Existing systems to document adverse drug events often use free text data entry, producing non-standardized, unstructured data prone to misinterpretation. Standardized terminology may improve data quality, but it is unclear which data standard is most appropriate to document adverse drug event symptoms and diagnoses.
OBJECTIVE
Our objective was to compare the utility, strengths, and weaknesses of different data standards for documenting adverse drug event symptoms and diagnoses.
METHODS
We performed a mixed-methods sub-study of a multicenter retrospective chart review. We reviewed research records of prospectively diagnosed adverse drug events at 5 Canadian hospitals. Two pharmacy research assistants independently entered symptoms and/or diagnoses for adverse drug events using 4 standards: MedDRA, SNOMED CT, SNOMED Adverse Reaction, and ICD-11. Disagreements between research assistants regarding case-specific utility of data standards were discussed until reaching consensus. We used consensus ratings to determine proportion of adverse drug events covered by a data standard, and coded and analyzed field notes from consensus sessions.
RESULTS
We reviewed 573 adverse drug events and found MedDRA and ICD-11 had excellent coverage of adverse drug event symptoms and/or diagnoses. While MedDRA had the highest number of matches between the research assistants, ICD-11 had the fewest. SNOMED ADR had the lowest proportion of adverse drug event coverage. Research assistants were most likely to encounter terminological challenges with SNOMED ADR and usability challenges with ICD-11, and least likely with MedDRA.
CONCLUSIONS
Usability, comprehensiveness, and accuracy are important features of data standards for documenting ADE symptoms and diagnoses. Based on our results, we would recommend the use of MedDRA.
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