Skip Navigation


Rheumatology Advance Access originally published online on June 6, 2006
Rheumatology 2007 46(1):131-134; doi:10.1093/rheumatology/kel171
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Supplementary data
Right arrow All Versions of this Article:
46/1/131    most recent
kel171v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (3)
Right arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by Zijlstra, T. R.
Right arrow Articles by Rasker, J. J.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Zijlstra, T. R.
Right arrow Articles by Rasker, J. J.
Related Collections
Right arrow Fibromyalgia
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author 2006. Published by Oxford University Press on behalf of the British Society for Rheumatology. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Validation of a Dutch translation of the fibromyalgia impact questionnaire

T. R. Zijlstra1, E. Taal2, M. A. F. J. van de Laar1,2 and J. J. Rasker2

1Department of Rheumatology, Medisch Spectrum Twente Hospital and 2Department of Communication Studies, University of Twente, Enschede, The Netherlands.

Correspondence to: Theo R. Zijlstra, MD, Campherbeeklaan 105, 8024 BV Zwolle, The Netherlands. E-mail: tr.zijlstra{at}worldonline.nl


  Abstract

Objectives. To validate a Dutch translation of the fibromyalgia impact questionnaire (FIQ).

Materials and methods. Data were taken from two randomized clinical trials on Spa treatment and venlafaxine in fibromyalgia (FM). Participants completed the Dutch FIQ and a set of validated questionnaires for general health (RAND-36), depression (Beck depression inventory, BDI), pain (McGill pain questionnaire, MPQ) and fatigue (checklist individual strength, CIS). Internal consistency within the FIQ item ‘physical functioning’ was studied using Cronbach's {alpha}. Test–retest reliability was studied with intra-class-correlation (ICC) in a subsample of 76 control subjects over a 3 month period without specific intervention. Construct validity was evaluated by correlating the FIQ to other questionnaires. Sensitivity to change was studied using standardized response means (SRM).

Results. The study sample consisted of 213 women and 11 men (mean age 47 yrs, mean disease duration 11 yrs). Cronbach's {alpha} for the item ‘physical functioning’ was 0.91, indicating high internal consistency. Test–retest reliability was acceptable, with ICC ranging from 0.45 for ‘morning tiredness’ to 0.71 for ‘physical function’. FIQ correlated significantly with the RAND-36, with Spearman's {rho} ranging from –0.60 to –0.70 for items measuring the same concept. Similar patterns of correlation were seen with MPQ, BDI and CIS. Sensitivity to change was sufficient, with SRM after Spa treatment ranging from 0.3 for ‘work days missed’ to 0.9 for ‘days felt good’. Similar SRM were found in the venlafaxine trial for patients reporting general improvement.

Conclusion. The Dutch FIQ is a valid instrument for measuring health status in FM, showing sufficient reliability, construct validity and responsiveness.

KEY WORDS: Fibromyalgia impact questionnaire, Fibromyalgia, Dutch version, Validation, Health assessment


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.