Translation, cross-cultural adaptation, and validation of the Developmental Coordination Disorder Daily Questionnaire (DCDDaily-Q) for the Brazilian context

Abstract

Introduction: The Developmental Coordination Disorder Daily Questionnaire (DCDDaily-Q) is an instrument designed to assess the performance, participation, and acquisition of a wide range of activities of daily living (ADLs) in children with developmental coordination disorder (DCD). Objective: To conduct the cross-cultural adaptation and examine the reliability and construct validity of the DCDDaily-Q in Brazilian children aged six to eight years. Method: The validation process was conducted in six stages: translation, synthesis, back-translation, review by an expert committee, administration to the target population, and analysis of psychometric properties. In the final stage, a study was conducted with 263 children aged six to eight years, in which parents or guardians answered the questionnaire, allowing for the analysis of reliability (Cronbach’s alpha) and construct validity (through confirmatory factor analysis). Results: The DCDDaily-Q showed good internal consistency in the performance (α = 0.876), participation (α = 0.838), and acquisition (α = 0.970) scales of ADLs. Confirmatory factor analysis indicated that the Brazilian version of the DCDDaily-Q demonstrates adequate semantic and cultural equivalence with the original construct. However, to achieve satisfactory fit indices in the confirmatory model it was necessary to establish error covariance between some items in the performance and participation scales. Conclusion: The findings suggest that the Brazilian version of the DCDDaily-Q is a reliable and valid instrument for assessing the acquisition, participation, and performance of a wide variety of ADLs.