| http://www.w3.org/ns/prov#value | - Periarticular structures, especially the muscles, are also affected.2 While any diarthrodial joint can be involved in OA, the distal and proximal interphalangeal joints of the hands are the most commonly affected, followed by the knees and the hips.3, 5 A diagnosis of OA is determined by joint symptoms, including pain and functional impairment or joint pathoanatomic changes, or both.
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