The Longitudinal Outcome of Fibromyalgia: A Study of 1555 Patients

  title={The Longitudinal Outcome of Fibromyalgia: A Study of 1555 Patients},
  author={Brian T. Walitt and Mary-Ann Fitzcharles and Afton L Hassett and Robert S. Katz and Winfried H{\"a}user and Frederick Wolfe},
  journal={The Journal of Rheumatology},
  pages={2238 - 2246}
Objective. To describe the diagnosis status and outcome of patients diagnosed with fibromyalgia (FM) by US rheumatologists. Methods. We assessed 1555 patients with FM with detailed outcome questionnaires during 11,006 semiannual observations for up to 11 years. At entry, all patients satisfied American College of Rheumatology preliminary 2010 FM criteria modified for survey research. We determined diagnosis status, rates of improvement, responder subgroups, and standardized mean differences… 

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