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Quality of Life Research

Erschienen in:

01.02.2015

Examining unidimensionality and improving reliability for the eight subscales of the SF-36 in opioid-dependent patients using Rasch analysis

verfasst von: Yu-Yu Hsiao, Ching-Lin Shih, Wan-Hui Yu, Cheng-Hsi Hsieh, Ching-Lin Hsieh

Erschienen in: Quality of Life Research | Ausgabe 2/2015

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Abstract

Purpose

The Medical Outcome Study Short Form 36 (SF-36) is one of the most commonly used questionnaires for monitoring the Health-Related Quality of Life (HRQOL) of opioid-dependent patients. However, the unidimensionality and reliability of the SF-36 have not been verified in opioid-dependent patients. The aim of this study was to examine the unidimensionality and to improve the test reliability of the SF-36 for use in opioid-dependent patients.

Methods

A total of 583 opioid-dependent patients were recruited in the study. Unidimensionality was examined by conducting unidimensional Rasch analysis. Item fit statistics and principle component analysis were used to check the item-model fit in each of the eight subscales of the SF-36. Reliability was evaluated by applying both unidimensional and multidimensional Rasch analyses.

Results

After three misfitting items were excluded, the remaining items of each subscale in the SF-36 represented a single construct. The test reliabilities (0.80–0.87) yielded by the multidimensional approach were much higher than those (0.68–0.82) produced by the unidimensional approach.

Conclusion

The remaining 32 items of the SF-36 are appropriate for evaluating the HRQOL in opioid-dependent patients in terms of unidimensionality. Additionally, the test scores produced by the multidimensional approach were more accurate than those obtained by the unidimensional approach.

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Titel: Examining unidimensionality and improving reliability for the eight subscales of the SF-36 in opioid-dependent patients using Rasch analysis
verfasst von: Yu-Yu Hsiao
Ching-Lin Shih
Wan-Hui Yu
Cheng-Hsi Hsieh
Ching-Lin Hsieh
Publikationsdatum: 01.02.2015
Verlag: Springer International Publishing
Erschienen in: Quality of Life Research / Ausgabe 2/2015
Print ISSN: 0962-9343
Elektronische ISSN: 1573-2649
DOI: https://doi.org/10.1007/s11136-014-0771-z

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Springer Medizin

Examining unidimensionality and improving reliability for the eight subscales of the SF-36 in opioid-dependent patients using Rasch analysis

Abstract

Purpose

Methods

Results

Conclusion

Live-Webinar "Chronische Unterbauch- und Viszeralschmerzen in der Praxis managen"

Springer Medizin

Abstract

Purpose

Methods

Results

Conclusion

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