Evaluating the predictive value of osteoarthritis diagnoses in an administrative database.
Meyers Primary Care Institute; Department of Medicine, Division of Geriatric Medicine; Department of Medicine, Division of Rheumatology
Medical Subject Headings
Aged; Confidence Intervals; Databases, Factual; Evaluation Studies as Topic; Female; Humans; Male; Middle Aged; Osteoarthritis; Predictive Value of Tests; Prevalence; Sex Ratio
Health Services Research | Medicine and Health Sciences
OBJECTIVE: To assess the positive and negative predictive values of osteoarthritis (OA) diagnoses contained in an administrative database. METHODS: We identified all members (> or =18 years of age) of a Massachusetts health maintenance organization with documentation of at least one health care encounter associated with an OA diagnosis during the period 1994-1996. From this population, we randomly selected 350 subjects. In addition, we randomly selected 250 enrollees (proportionally by the age and sex of the 350 subjects) who did not have a health care encounter associated with an OA diagnosis. Trained nurse reviewers abstracted OA-related clinical, laboratory, and radiologic data from the medical records of both study groups (all but 1 chart was available for review). Pairs of physician reviewers evaluated the abstracted information for both groups of subjects and rated the evidence for the presence of OA according to 3 levels: definite, possible, and unlikely. RESULTS: Among the group of patients with an administrative diagnosis of OA, 215 (62%) were rated as having definite OA, 36 (10%) possible OA, and 98 (28%) unlikely OA, according to information contained in the medical record. The positive predictive value of an OA diagnosis was 62%. In those without an administrative OA diagnosis, 44 (18%) were assigned a rating of definite OA. The negative predictive value of the absence of an administrative OA diagnosis was 78%. CONCLUSION: Use of administrative data in epidemiologic and health services research on OA may lead to both case misclassification and under ascertainment.
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Citation: Arthritis Rheum. 2000 Aug;43(8):1881-5.
Harrold, Leslie R.; Yood, Robert A.; Andrade, Susan E.; Reed, John I.; Cernieux, Jackie; Straus, Walter; Weeks, Mary; Lewis, Barbara E.; and Gurwitz, Jerry H., "Evaluating the predictive value of osteoarthritis diagnoses in an administrative database." (2000). Meyers Primary Care Institute Publications and Presentations. 90.