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CC BY-NC-ND 4.0 · Arq Neuropsiquiatr 2018; 76(10): 674-684
DOI: 10.1590/0004-282X20180098
Article

Cross-cultural adaptation and validation of the International Cooperative Ataxia Rating Scale (ICARS) to Brazilian Portuguese

Tradução para o português e validação da Escala Cooperativa Internacional para Avaliação das Ataxias (ICARS)
Fernanda Aparecida Maggi
1   Universidade Federal de São Paulo, Departamento de Neurologia, Divisão de Neurologia Geral, São Paulo SP, Brasil;
,
Pedro Braga-Neto
2   Universidade Federal do Ceará, Departamento de Medicina Clínica, Divisão de Neurologia;
3   Universidade Estadual do Ceará, Centro de Ciências da Saúde, Fortaleza CE, Brasil;
,
Hsin Fen Chien
4   Universidade de São Paulo, Faculdade de Medicina, Intituto de Ortopedia e Traumatologia, São Paulo SP, Brasil;
,
Maria Thereza Drumond Gama
1   Universidade Federal de São Paulo, Departamento de Neurologia, Divisão de Neurologia Geral, São Paulo SP, Brasil;
,
Flávio Moura Rezende Filho
1   Universidade Federal de São Paulo, Departamento de Neurologia, Divisão de Neurologia Geral, São Paulo SP, Brasil;
,
Maria Luiza Saraiva-Pereira
5   Hospital de Clínicas de Porto Alegre, Laboratório de Identificação Genética e Serviço de Genética Médica, Porto Alegre RS, Brasil;
6   Universidade Federal do Rio Grande do Sul, Departamento de Bioquímica, Porto Alegre RS, Brasil;
,
Laura Bannach Jardim
5   Hospital de Clínicas de Porto Alegre, Laboratório de Identificação Genética e Serviço de Genética Médica, Porto Alegre RS, Brasil;
7   Universidade Federal do Rio Grande do Sul, Departamento de Medicina Interna, Porto Alegre RS, Brasil;
,
Mariana Callil Voos
8   Universidade de São Paulo, Faculdade de Medicina, Departamento de Fisioterapia, Terapia Ocupacional e Fonoaudiologia, São Paulo SP, Brasil
,
José Luiz Pedroso
1   Universidade Federal de São Paulo, Departamento de Neurologia, Divisão de Neurologia Geral, São Paulo SP, Brasil;
,
Orlando Graziani Povoas Barsottini
1   Universidade Federal de São Paulo, Departamento de Neurologia, Divisão de Neurologia Geral, São Paulo SP, Brasil;
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ABSTRACT

Introduction: The clinical assessment of patients with ataxias requires reliable scales. We aimed to translate, adapt and validate the International Cooperative Ataxia Rating Scale (ICARS) into Brazilian Portuguese.

Methods: The steps of this study were forward translation, translation synthesis, backward translation, expert committee meeting, preliminary pilot testing and final assessment. Thirty patients were enrolled in the preliminary pilot testing and 61 patients were evaluated for construct validity, internal consistency, intra- and inter-rater reliability and external consistency.

Results: This study showed good validity of the construct and high internal consistency for the full scale, except for the oculomotor domain (Cronbach's alpha = 0.316, intraclass correlation coefficients intra- = 82.4% and inter- = 79.2%). A high correlation with the Scale for the Assessment and Rating of Ataxia was observed. We found good intra-rater agreement and relative inter-rater disagreement, except in the posture and gait domain.

Conclusion: The present ICARS version is adapted for the Brazilian culture and can be used to assess our ataxic patients.

RESUMO

Introdução: A avaliação clínica de pacientes atáxicos requer instrumentos confiáveis. Nosso objetivo foi traduzir, adaptar culturalmente e validar a International Cooperative Ataxia Rating Scale (ICARS) para a língua portuguesa do Brasil.

Métodos: As etapas foram tradução, síntese das traduções, retrotradução, comitê de especialistas, pré-teste e avaliação final. O pré-teste foi realizado com 30 pacientes. Outros 61 pacientes foram avaliados para validade do constructo, consistência interna, confiabilidade intra e interexaminadores e consistência externa.

Resultados: Este estudo mostrou boa validade do constructo e alta consistência interna para o total da escala, exceto para o domínio Oculomotor (alfa de Cronbach = 0.316, CCIintra = 82.4% e CCIinter = 79.2%). Alta correlação com a Scale for the Assessment and Rating of Ataxia foi observada. Nós encontramos boa concordância intraexaminador e relativa discordância interexaminadores, com exceção dos domínios postura e marcha.

Conclusão: Esta versão da ICARS está adaptada para a cultura brasileira e pode ser usada em pacientes com ataxia.

Keywords:

Spinocerebellar ataxias - translating - validation studies

Palavras-chave:

Ataxias espinocerebelares - tradução - estudos de validação

Support

This work did not receive any specific grant from funding agencies in the public, commercial, or non-profit sectors. The authors Pedro Braga-Neto, Maria Luiza Saraiva-Pereira and Laura Bannach Jardim were supported by the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq).


APPENDIX



Publication History

Received: 28 April 2018

Accepted: 20 June 2018

Article published online:
22 August 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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