title: Cross-cultural adaptation of the Revised Korean version of the Fibromyalgia Impact Questionnaire: its association with physical function and quality of life.
abstract: OBJECTIVE
  Despite its shortcomings, the Fibromyalgia Impact Questionnaire (FIQ) is widely used to assess clinical symptoms and measure therapeutic changes in patients with fibromyalgia (FM). Recently, the revised version of the FIQ (FIQR) was released. In this study, we validated the Korean version of the FIQR and evaluated whether the revised version is superior to the original version in reflecting the physical function and quality of life of these patients.
  
  
  METHODS
  Seventy-nine patients with FM were invited to complete a questionnaire that included the original FIQ, FIQR, Multidimensional Health Assessment Questionnaire (MDHAQ), Rheumatology Attitudes Index (RAI), and Medical Outcome Study Short-Form 36 (SF-36).
  
  
  RESULTS
  The test-retest reliability was assessed in 55 patients after 1 week, and the Spearman coefficients were 0.604-0.825 and Cronbach's alpha was 0.948 (95% confidence interval 0.930-0.964). The FIQR was significantly correlated with the pain visual analogue scale (VAS), fatigue VAS, RAI, MDHAQ, and physical and mental component summary scores of the SF-36. The FIQR was more strongly associated with the MDHAQ and SF-36 scores than with the original FIQ.
  
  
  CONCLUSIONS
  Our study showed that the FIQR is a reliable, valid instrument for assessing patients with FM and performs better in the prediction of physical function and health status than the original version.
authors.affiliation: Division of Rheumatology, Department of Internal Medicine, Chonnam National University Medical School and Hospital, Gwangju, South Korea.
authors.forename: Seong-Rye
authors.initials: SR
authors.lastname: Seo
authors.affiliation: Division of Rheumatology, Department of Internal Medicine, Chonnam National University Medical School and Hospital, Gwangju, South Korea.
authors.forename: Dong-Jin
authors.initials: DJ
authors.lastname: Park
authors.affiliation: Division of Rheumatology, Department of Internal Medicine, Chonnam National University Medical School and Hospital, Gwangju, South Korea.
authors.forename: Ji-Hyoun
authors.initials: JH
authors.lastname: Kang
authors.affiliation: Division of Rheumatology, Department of Internal Medicine, Chonnam National University Medical School and Hospital, Gwangju, South Korea.
authors.forename: Jeong-Won
authors.initials: JW
authors.lastname: Lee
authors.affiliation: Division of Rheumatology, Department of Internal Medicine, Chonnam National University Medical School and Hospital, Gwangju, South Korea.
authors.forename: Kyung-Eun
authors.initials: KE
authors.lastname: Lee
authors.affiliation: Division of Rheumatology, Department of Internal Medicine, Chonnam National University Medical School and Hospital, Gwangju, South Korea.
authors.forename: Lihui
authors.initials: L
authors.lastname: Wen
authors.affiliation: Division of Rheumatology, Department of Internal Medicine, Chonnam National University Medical School and Hospital, Gwangju, South Korea.
authors.forename: Tae-Jong
authors.initials: TJ
authors.lastname: Kim
authors.affiliation: Division of Rheumatology, Department of Internal Medicine, Chonnam National University Medical School and Hospital, Gwangju, South Korea.
authors.forename: Yong-Wook
authors.initials: YW
authors.lastname: Park
authors.affiliation: Division of Rheumatology, Department of Internal Medicine, Chonnam National University Medical School and Hospital, Gwangju, South Korea.
authors.forename: Shin-Seok
authors.initials: SS
authors.lastname: Lee
mesh_terms: D000328:Adult; D044466:Asian People / Q000523:psychology*; D003466:Cultural Characteristics; D005260:Female; D005356:Fibromyalgia / Q000175:diagnosis* / Q000208:ethnology / Q000503:physiopathology / Q000523:psychology; D006304:Health Status; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011788:Quality of Life; D015203:Reproducibility of Results; D056910:Republic of Korea; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires
keywords: fibromyalgia; questionnaires; validation studies