Vol.23 No.5

Original Article

The Japanese version of the modified ACR Preliminary Diagnostic Criteria for Fibromyalgia and the Fibromyalgia Symptom Scale: reliability and validity

Authors

Chie Usui 1 , Kotaro Hatta1 , Satoko Aratani2 , Naoko Yagishita3 , Kenya Nishioka4 , Teruhisa Kanazawa5 , Kenji Itoh6 , Yoshihisa Yamano3 , Hiroyuki Nakamura7 , Toshihiro Nakajima2 , Kusuki Nishioka2

  • Department of Psychiatry, Juntendo University Nerima Hospital, 3-1-10 Takanodai, Nerima-ku, Tokyo 177-8521, Japan
  • Institute of Innovative Medical Science and Education, Tokyo Medical University, 6-1-1 Shinjuku, Shinjuku-ku, Tokyo 160-8402, Japan
  • Institute of Medical Science, St. Marianna University School of Medicine, 2-16-1 Sugo, Miyamae-ku, Kawasaki Kanagawa, 216-8511, Japan
  • Department of Neurology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
  • Department of Rheumatology, Tokyo Medical University Ibaraki Medical Center, 3-20-1 Chuo, Ami-cho, Inashiki-gun Ibaraki, 300-0395, Japan
  • Department of Rheumatology, National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan
  • Department of Environmental and Preventive Medicine, Graduate School of Medical Science, Kanazawa University, Kakuma-cho, Kanazawa Ishikawa, 920-1192, Japan
Received:

18 January 2012

Accepted:

23 August 2012

Published online:

24 September 2012

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Abstract

Purpose The aim of this study is to investigate the reliability and validity of the Japanese version of the modified American College of Rheumatology (ACR) Preliminary Diagnostic Criteria for Fibromyalgia (mACR 2010-J) and the Fibromyalgia Symptom Scale (mFS-J). Methods According to the ACR 1990 classification criteria, patients with chronic pain were divided into the fibromyalgia group and nonfibromyalgia group (rheumatoid arthritis and osteoarthritis). Patients in both groups were assessed using mACR 2010-J and mFS-J. Results 294 of 462 (64 %) patients in the fibromyalgia group met mACR 2010-J, whereas 4 % (9/231) of the nonfibromyalgia group did, with sensitivity of 64 %, specificity of 96 %, positive predictive value of 97 %, negative predictive value of 56 %, and positive likelihood ratio of 16.3. Mean total scores on mFS-J significantly differentiated the fibromyalgia from the nonfibromyalgia group. According to the value of the Youden index, the best cutoff score for the mFS-J was 9/10. Conclusion Our findings indicate that mACR 2010-J as a positive test and mFS-J as a quantification scale might be suitable for assessing fibromyalgia among Japanese chronic pain populations.

Key words

Diagnostic criteria, Fibromyalgia, Symptom scale, Modified ACR Preliminary Diagnostic Criteria for Fibromyalgia