Adverse Event Reports Vary in Completeness
University of Tokyo researchers say the quality of adverse event reports submitted to FDA seems to depend on information costs accrued to potential reporters. They found that the completeness of reports from consumers was generally greater than that of reports from healthcare professionals.
“Completeness of specific items varied among different occupations,” the researchers say in an open source article in the Journal of Clinical Pharmacy and Therapeutics, “which may reflect accessibility to, and/or availability of, relevant information for each type of reporter. There was a clear association between the proportion of known adverse drug reactions in a report and completeness, suggesting that consumers and healthcare professionals are likely to consult labeling information when reporting adverse events.”
The report says that researchers should consider the impact of database heterogeneity and possible sample selection bias when using spontaneous adverse event reports as a sample of events in the U.S.