Rheumatology International

, Volume 34, Issue 2, pp 181–189 | Cite as

Validation of a Persian version of the Fibromyalgia Impact Questionnaire (FIQ-P)

  • Ali Bidari
  • Morteza Hassanzadeh
  • Mohamad-Farzam Mohabat
  • Elham Talachian
  • Effat Merghati KhoeiEmail author
Original Article


The aim of this study is to translate, adapt, and validate a Persian version of the Fibromyalgia (FM) Impact Questionnaire (FIQ-P). The FIQ-P was adapted following the translation and back-translation approach; then, it was administered to thirty females with FM. Participants also completed two other validated questionnaires, the Medical Outcome Survey Short Form-36 (SF-36) and the Beck Depression Inventory (BDI). Internal consistency within the FIQ-P items and its test–retest reliability were assessed with Cronbach’s alpha and Spearman’s correlation coefficient, respectively. Construct validity was analyzed by Spearman’s r when correlating the FIQ-P to other questionnaires. The translated version was concordant. Adaptation affected two sub-items of physical function. Participants’ mean age ± standard deviation was 40.4 ± 9.0 years. Internal consistency proved good with α = 0.80. Test–retest coefficient ranged from 0.50 for the item “work days missed” to 0.79 for all FIQ-P items. Fair and statistically significant (P < 0.01) correlations were found between the FIQ-P items and two other questionnaires, SF-36 (r = −0.57) and BDI (r = 0.53). We concluded that the FIQ-P is a valid and reliable instrument for measuring health status of Persian-speaking FM patients.


Fibromyalgia Impact Questionnaire Validation studies Persian Iran 


Conflict of interest



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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Ali Bidari
    • 1
  • Morteza Hassanzadeh
    • 2
  • Mohamad-Farzam Mohabat
    • 3
  • Elham Talachian
    • 4
  • Effat Merghati Khoei
    • 5
    Email author
  1. 1.Department of RheumatologyIran University of Medical SciencesTehranIran
  2. 2.Department of Internal MedicineIran University of Medical SciencesTehranIran
  3. 3.Medical Laser Research Center, Iranian Center for Medical Laser (ICML)Academic Center for Education, Culture and Research (ACECR)TehranIran
  4. 4.Division of Pediatric GastroenterologyIran University of Medical SciencesTehranIran
  5. 5.Brain and Spinal Cord Injury Research Center (BASIR), Iranian National Center of Addiction Studies (INCAS)Tehran University of Medical SciencesTehranIran

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