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DESTIN, FLA. -- The tender point criteria commonly used to diagnose fibromyalgia are not useful and in fact may even explain why the disease appears to disproportionately affect women, Daniel Clauw, M.D., said at a rheumatology meeting sponsored by Virginia Commonwealth University.
According to the American College of Rheumatology's 1990 classification criteria, patients must have widespread pain and tenderness in 11 of 18 tender points in order to be diagnosed with fibromyalgia.
Yet "tender points merely represent areas of the body where everyone is more tender," explained Dr. Clauw, the executive director of the Chronic Pain and Fatigue Research Center at the University of Michigan in Ann Arbor.
Fibromyalgia patients and healthy individuals were found to have different thresholds of pain in those tender points. These two groups also had different thresholds of pain in areas not thought to be tender. In addition, the cutoff of 11 out of 18 tender points is arbitrary. "We know that tenderness varies a great deal from day to day and week to week, especially in women," he said.
In clinical practice, many physicians are ...