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Article
August 17, 1979

An Algorithm for the Operational Assessment of Adverse Drug ReactionsII. Demonstration of Reproducibility and Validity

Author Affiliations

From the Robert Wood Johnson Clinical Scholar Program and the Departments of Medicine (Drs Hutchinson and Feinstein), Pediatrics (Drs Leventhal and Kramer), and Epidemiology (Dr Feinstein), Yale University School of Medicine, New Haven, Conn; and the Department of Pharmacology, University of Rochester, Rochester, NY (Dr Karch); and the Department of Pharmacy Practice, University of Utah, Salt Lake City (Dr Lipman).

JAMA. 1979;242(7):633-638. doi:10.1001/jama.1979.03300070029018
Abstract

The reproducibility and validity of an algorithm for diagnosis of adverse drug reactions (ADRs) were tested in a clinical spectrum of 30 suspect cases. Using a questionnaire derived from the algorithm the three algorithm developers (nonexperts) agreed on the probability of ADR in 67% of cases, with pair-wise agreement varying from 73% to 87%. The pair-wise agreement of two clinical pharmacologic experts rose from 47% without the algorithm to 63% with the algorithm, with Kw, a chance-corrected index of weighted agreement, increasing from 0.26 to 0.57. The algorithmic assessments of the three nonexperts agreed with expert consensus in 80% to 83% of cases. The ADR algorithm appears to provide a reproducible and valid method of evaluating the likelihood of ADRs in individual patients. Its use can help improve the diagnostic and epidemiologic approach to these important, complex clinical phenomena.

(JAMA 242:633-638, 1979)

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