Clinical Rheumatology

, Volume 32, Issue 3, pp 333–339 | Cite as

Not throwing out the baby with the bathwater: lessons from the Fibromyalgia Impact Questionnaire

  • C. Paul van Wilgen
  • Pieter Jelle Vuijk
  • Miriam W. van Ittersum
  • Jo Nijs
Original Article
First Online:
Received:
Revised:
Accepted:

Abstract

The Fibromyalgia Impact Questionnaire (FIQ) is the most frequently used questionnaire in patients with fibromyalgia in the last 20 years. Recently, a revised version of the FIQ has been published. In this study, we examined the factor structure of the original version using explorative and confirmative factor analyses in a representative group of about 500 Dutch and Belgian patients with fibromyalgia, in which the work-related item was excluded. The FIQ consisting of a three-factor structure with a functional domain (ten items), physical symptom domain (six items), and mental symptom domain (two items), which is the most accurate. From the data presented, it is concluded that the FIQ is a solid, worldwide-used questionnaire with a history of 20 years consisting of three domains. When constructing a revised FIQ, the results of this study can be incorporated.

Keywords

Disability Factor analysis Fibromyalgia Psychometric Questionnaire Validity 
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Notes

Acknowledgments

The authors would like to thank all patients who participated in this study by filling out the FIQ.

Funding

None

Disclosures

None.

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Copyright information

© Clinical Rheumatology 2012

Authors and Affiliations

  • C. Paul van Wilgen
    • 1
  • Pieter Jelle Vuijk
    • 2
  • Miriam W. van Ittersum
    • 3
  • Jo Nijs
    • 4
    • 5
    • 6
  1. 1.TranscareTransdisciplinary Pain Management CenterGroningenThe Netherlands
  2. 2.Department of Clinical NeuropsychologyVU UniversityAmsterdamThe Netherlands
  3. 3.CaRES Centre of Applied Research and Innovation (Care Rehabilitation Education and Sports) and Department of Health Sciences, Community and Occupational Medicine, University of Groningen, University Medical Center GroningenGroningenThe Netherlands
  4. 4.Chronic Pain and Chronic Fatigue Research Group (CHROPIVER), Department of Human Physiology, Faculty of Physical Education and PhysiotherapyVrije Universiteit BrusselBrusselsBelgium
  5. 5.Chronic Pain and Chronic Fatigue Research Group (CHROPIVER), Division of Musculoskeletal Physiotherapy, Department of Health Care SciencesArtesis University College AntwerpAntwerpBelgium
  6. 6.Department of Physical Medicine and PhysiotherapyUniversity Hospital BrusselsBrusselsBelgium

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