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CC BY-NC-ND 4.0 · Arq Neuropsiquiatr 2016; 74(04): 320-328
DOI: 10.1590/0004-282X20160030
ARTICLE

Validation of the Brazilian version of the neurological fatigue index for multiple sclerosis

Validação da versão brasileira do índice neurológico de fadiga na esclerose múltipla
Josiane Lopes
1   Universidade Estadual de Londrina, Programa de Pós Graduação em Ciências da Saúde,LondrinaPR,Brazil;
,
Edson Lopes Lavado
2   Universidade Estadual de Londrina,Departamento de Fisioterapia,LondrinaPR,Brazil;
,
Damacio Ramón Kaimen-Maciel
3   Universidade Estadual de Londrina,Departamento de Clínica Médica,LondrinaPR,Brazil.
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ABSTRACT

The Neurological Fatigue Index for Multiple Sclerosis (NFI-MS) is a new fatigue assessment instrument. The aim of this study was to cross-culturally adapt and assess the psychometric properties of the Brazilian version of the NFI-MS (NFI-MS/BR).

Method Two hundred and forty subjects with MS were recruited for this study. The adaptation of the NFI-MS was performed by translation and back translation methodology. In psychometric analysis was performed the administration of the questionnaires Epworth Sleep Scale, Fatigue Severity Scale, Modified Fatigue Impact Scale, Multiple Sclerosis Impact Scale-29, NFI-MS/BR and Pittsburgh Sleep Quality Index with retest of the NFI-MS/BR after 7 days.

Results Reliability was assessed (intraclass correlation coefficients between 0.77 and 0.86), and validity by testing 41 hypotheses about expected correlations between subscales and confirmed 36. The majority of correlations were demonstrated.

Conclusion The NFI-MS/BR is a cross-culturally adapted, valid, and reliable instrument for assessing MS fatigue among Brazilian subjects.

RESUMO

O índice neurológico de fadiga na esclerose múltipla (EM) (NFI-MS) é um novo instrumento de avaliação da fadiga. O objetivo deste estudo foi adaptar transculturalmente e avaliar as propriedades psicométricas da versão Brasileira do NFI-MS (NFI-MS/BR).

Método Duzentos e quarenta indivíduos com EM participaram deste estudo. A adaptação do NFI-MS/BR foi feita por meio de tradução e retrotradução. Na análise psicométrica foi realizada administração dos questionários Escala de Sono de Epworth, Escala de Severidade de Fadiga, Escala Modificada de Impacto de Fadiga, Escala de Impacto de EM, NFI-MS/BR e Índice de Qualidade de Sono de Pittsburgh com reteste do NFI-MS/BR em 7 dias.

Resultados A confiabilidade foi avaliada (coeficiente de correlação intraclasse entre 0,77 e 0,86), e a validade foi avaliada testando 41 hipóteses sobre as correlações esperadas com confirmação de 36 hipóteses. A maioria das correlações da validade de constructo foi demonstrada.

Conclusão O NFI-MS/BR é um instrumento adaptado transculturalmente, válido e confiável para avaliar fadiga em indivíduos brasileiros com EM.

multiple sclerosis - fatigue - assessment - validation studies - psychometrics
esclerose múltipla - fadiga - avaliação - estudos de validação - psicometria


Publication History

Received: 26 October 2015

Accepted: 05 January 2016

Article published online:
06 September 2023

© 2023. Academia Brasileira de Neurologia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commecial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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