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Health and Quality of Life Outcomes
Published in: Health and Quality of Life Outcomes 1/2013

Open Access 01-12-2013 | Research

Performance of the Dutch SF-36 version 2 as a measure of health-related quality of life in patients with rheumatoid arthritis

Authors: Peter M ten Klooster, Harald E Vonkeman, Erik Taal, Liseth Siemons, Lidy Hendriks, Alphons J L de Jong, Ellen A J Dutmer, Piet L C M van Riel, Mart A F J van de Laar

Published in: Health and Quality of Life Outcomes | Issue 1/2013

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Abstract

Background

The aim of this study was to examine the measurement properties of the Dutch SF-36 version 2 (SF-36v2) health survey in patients with rheumatoid arthritis (RA).

Methods

Scaling assumptions, internal reliability, and internal construct validity were examined using available data from 1884 RA patients included in the Dutch Rheumatoid Arthritis Monitoring (DREAM) registry. External construct validity and responsiveness to change were examined using baseline and 6-month follow-up data from a subset of 387 early RA patients participating in the DREAM remission induction cohort.

Results

The individual items of the SF-36v2 adequately met scaling assumptions, although four items correlated too highly with items from different scales. Internal consistency was high for all eight scales and the physical and mental health components underlying the scales were replicated, supporting the use of the standard scoring algorithms. The SF-36v2 scales demonstrated minimal floor effects and ceiling effects were noteworthy only for the role-physical, social functioning, and role-emotional scales. Correlations with other core measures were as expected and the SF-36v2 showed excellent known-groups validity in distinguishing between patients with low or moderate-high disease activity. All scales related to physical health showed moderate to large responsiveness to change in patients that achieved low disease activity at six months.

Conclusion

The SF-36v2 appears to be a psychometrically sound tool for the assessment of health-related quality of life of Dutch patients with RA.
Appendix
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Metadata
Title
Performance of the Dutch SF-36 version 2 as a measure of health-related quality of life in patients with rheumatoid arthritis
Authors
Peter M ten Klooster
Harald E Vonkeman
Erik Taal
Liseth Siemons
Lidy Hendriks
Alphons J L de Jong
Ellen A J Dutmer
Piet L C M van Riel
Mart A F J van de Laar
Publication date
01-12-2013
Publisher
BioMed Central
Published in
Health and Quality of Life Outcomes / Issue 1/2013
Electronic ISSN: 1477-7525
DOI
https://doi.org/10.1186/1477-7525-11-77

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