# Deafness and Additional Disabilities Questionnaire: translation and cultural adaptation into Brazilian Portuguese

## TL;DR

The Deafness and Additional Disabilities Questionnaire was translated and adapted into Brazilian Portuguese for use with mothers of deaf children.

## Contribution

The paper presents a culturally adapted version of the DAD-Q questionnaire for Brazilian Portuguese speakers.

## Key findings

- The translated questionnaire achieved high internal consistency and was well understood by participants.
- Participants rated the instrument as very easy and quick to complete.
- The final version is called Questionário de Surdez e Deficiências Adicionais (DADQ-PT).

## Abstract

Translate and culturally adapt the Deafness and Additional Disabilities Questionnaire (DAD-Q) into Brazilian Portuguese.

Translation, back-translation, review by an expert committee, and cultural adaptation were conducted. For the cultural adaptation, 11 mothers of deaf children with additional disabilities, who use cochlear implants, participated. The reliability of the translated instrument was estimated using internal consistency analysis (Cronbach's Alpha). Equivalence was defined as the absence of difficulty in understanding the questions by at least 80% of the participants. The participants also rated the difficulty in responding to the Brazilian Portuguese version of the instrument and the time required for its application.

The discrepancies in the translation were resolved by the expert committee, and 100% of the participants reported understanding all the questions in the instrument without difficulty. The Cronbach's alpha coefficient demonstrated nearly perfect internal consistency for the instrument and substantial consistency in the other domains. Most participants rated the instrument as "very easy" and "quick" to respond to.

The DAD-Q instrument was translated and adapted into Brazilian Portuguese, resulting in the Questionário de Surdez e Deficiências Adicionais (DADQ-PT).

Traduzir e adaptar culturalmente o instrumento Deafness and Additional Disabilities Questionnaire (DAD-Q) para o Português Brasileiro.

Realizou-se a tradução, retrotradução, revisão por comitê de especialistas e adaptação cultural. Para a adaptação cultural, participaram 11 mães de crianças surdas com deficiências adicionais, usuárias de implante coclear. A confiabilidade do instrumento traduzido foi estimada utilizando-se a análise de consistência interna (Alfa de Cronbach). Adotou-se como equivalência a ausência de dificuldade de compreensão das questões por, no mínimo, 80% das participantes. As participantes também classificaram a dificuldade em responder à versão no português brasileiro do instrumento e o tempo de aplicação.

As divergências na tradução foram resolvidas pelo comitê de especialistas e 100% das participantes afirmaram compreender todas as questões do instrumento, sem dificuldades. O coeficiente alfa de Cronbach demonstrou consistência interna quase perfeita do instrumento e substancial nos demais domínios. A maioria das participantes classificou o instrumento como “muito fácil” e “rápido” de responder.

O instrumento DAD-Q foi traduzido e adaptado para o Português Brasileiro, resultando no “Questionário de Surdez e Deficiências Adicionais (DADQ-PT)”.