Author(s): Hannan MT, Felson DT, Pincus T
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Abstract OBJECTIVE: To analyze cross sectional data from the National Health and Nutrition Examination Survey (NHANES I) concerning 3 indicators of osteoarthritis (OA) of the knee: radiographic evidence of structural damage, self-reported knee pain, and self-report of a diagnosis of arthritis at any joint by a physician. METHODS: Analysis of NHANES I data for 6880 persons ages 25-74 in the United States. RESULTS: Radiographic stage 2-4 knee OA was found in 319 subjects (3.7\%); only 47\% of these individuals reported knee pain, and only 61\% reported that a physician had told them that they had arthritis. Knee pain was reported by 1004 subjects (14.6\%), only 15\% of whom had radiographic stage 2-4 changes of OA, and 59\% of whom reported having a diagnosis of arthritis by a physician. A report of arthritis diagnosed by a physician was given by 1762 subjects (25.6\%), of whom only 11\% had stage 2-4 radiographic knee OA and 34\% reported knee pain. CONCLUSION: Substantial discordance exists in this population based study between radiographic OA of the knee versus knee pain, versus a diagnosis of arthritis by a physician. These phenomena may be important in the design of clinical research studies, as well as in criteria for OA.
This article was published in J Rheumatol
and referenced in Journal of Novel Physiotherapies