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Development of the Japanese version of the Fibromyalgia Impact Questionnaire (JFIQ): psychometric assessments of reliability and validity.
MedLine Citation:
PMID:  21303485     Owner:  NLM     Status:  In-Data-Review    
Aim:  To perform a psychometric assessment of the Japanese version of the Fibromyalgia Impact Questionnaire (JFIQ). Methods:  Data for the psychometric assessment were collected from Japanese fibromyalgia (FM) patients who visited a clinic. Analyses were performed to examine the reliability and validity of the JFIQ. Results:  A total of 56 patients were included in the analysis. There was no remarkable floor or ceiling effect for the JFIQ item or total scores. In the analysis of reproducibility, the interclass correlation coefficients of each item score and total score ranged from 0.61 to 0.95. Cronbach's alpha coefficient was 0.92. For the concurrent validity, the total score and most of the item scores correlated to every domain of Short Form-36 or Beck Depression Inventory-II to a moderate or great extent. The results of the known-group comparisons indicated that the total score tended to increase with the increase in severity of FM and pain (P-values for trend < 0.05). Conclusion:  This psychometric assessment demonstrated good reliability and validity of the JFIQ for use with Japanese FM patients. In the future, we expect that this questionnaire will be used in clinical studies and medical practice, and will be beneficial in the development of new therapies as well as for the comprehensive evaluation of patients' conditions in Japan.
Kenichi Osada; Hiroshi Oka; Tatsuya Isomura; Ikuro Nakamura; Keiichiro Tominaga; Shinobu Takahashi; Ayako Kojima; Kusuki Nishioka
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International journal of rheumatic diseases     Volume:  14     ISSN:  1756-185X     ISO Abbreviation:  Int J Rheum Dis     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-02-09     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101474930     Medline TA:  Int J Rheum Dis     Country:  England    
Other Details:
Languages:  eng     Pagination:  74-80     Citation Subset:  IM    
Copyright Information:
© 2011 The Authors. International Journal of Rheumatic Diseases © 2011 Asia Pacific League of Associations for Rheumatology and Blackwell Publishing Asia Pty Ltd.
Department of Neuropsychiatry Institute of Medical Science, St. Marianna University School of Medicine, Kanagawa CLINICAL STUDY SUPPORT, Inc., Aichi Argenes, Inc., Tokyo Kasumigaseki Urban Clinic, Tokyo Gakushuin University Graduate School of Humanities, Tokyo, Japan.
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