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Erschienen in:

01.11.2013

Validation of a Dutch version of the Neurological Fatigue Index (NFI-MS) for patients with multiple sclerosis in the Netherlands

verfasst von: Arthur Derksen, Lidwine B. Mokkink, Marc B. Rietberg, Dirk L. Knol, Raymond W. J. G. Ostelo, Bernard M. J. Uitdehaag

Erschienen in: Quality of Life Research | Ausgabe 9/2013

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Abstract

Purpose

Fatigue is a complex, multidimensional construct. Most questionnaires measuring fatigue do not meet the standards for good measurement properties. Therefore, the Neurological Fatigue Index for multiple sclerosis (NFI-MS) is recently developed using thorough methods. The aim of this study was to develop and validate the Dutch version of the NFI-MS.

Methods

The original English version of the NFI-MS was translated into Dutch using a forward–backward procedure. Reliability (intraclass correlation coefficient (ICC) and standard error of measurement (SEM)) were assessed for the summary score and the four subscale scores separately. Construct validity was assessed by testing hypotheses about expected correlations between the NFI-MS and other constructs (e.g. impact on functioning and depression) and expected differences on NFI scores between groups defined on the basis of disease type and work status.

Results

The reliability analyses (n = 118) showed that the ICC was 0.78 (NFI-MS summary) and ranged from 0.75 to 0.83 for the four subscales and the SEM was 2.5 (NFI-MS summary) and ranged from 1.1 to 2.2 for the four subscales. For construct validity (n = 136), 50 out of the 57 expected hypotheses were confirmed (88 %).

Conclusion

The present study shows that the Dutch version of the NFI-MS is a reliable and valid self-report questionnaire for measuring fatigue in Dutch patients with MS.

Vorheriger Artikel Evidence for a unidimensional 15-item version of the CASP-19 using a Rasch model approach

Nächster Artikel Psychometric evaluation of the EORTC computerized adaptive test (CAT) fatigue item pool

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Titel: Validation of a Dutch version of the Neurological Fatigue Index (NFI-MS) for patients with multiple sclerosis in the Netherlands
verfasst von: Arthur Derksen
Lidwine B. Mokkink
Marc B. Rietberg
Dirk L. Knol
Raymond W. J. G. Ostelo
Bernard M. J. Uitdehaag
Publikationsdatum: 01.11.2013
Verlag: Springer Netherlands
Erschienen in: Quality of Life Research / Ausgabe 9/2013
Print ISSN: 0962-9343
Elektronische ISSN: 1573-2649
DOI: https://doi.org/10.1007/s11136-013-0375-z

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Abstract

Purpose

Methods

Results

Conclusion

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