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Researchers have evaluated concordance between frequent hip pain and radiographic hip osteoarthritis (OA) in only a few studies. In this analysis, investigators used data from two cohort studies to calculate the accuracy of hip x-rays as a diagnostic test for hip OA. Hip pain “localized to the groin or anteriorly” was used as the clinical gold standard for hip OA.
In the Framingham study (946 patients; mean age, 64), 16% of hips in patients with frequent hip pain had radiographic OA, and 21% of hips with radiographic OA were frequently painful. The sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of radiographic hip OA for hip pain localized to the groin were 37%, 91%, 6%, and 99%, respectively. …