Construct Validity of the Brazilian Portuguese Version of the Thyroidectomy‐Related Voice and Symptom Questionnaire (BR‐PT‐TVSQ)

What is already known on this subject The Thyroidectomy-Related Voice and Symptom Questionnaire (TVSQ) was developed to identify and monitor symptoms related to voice, swallowing and neck discomfort in patients undergoing thyroidectomy. The TVSQ has already been translated and culturally adapted into Brazilian Portuguese (BR-PT-TVSQ). However, the BR-PT-TVSQ still lacks validation for other measurement properties, including construct validity. What this paper adds to existing knowledge This study demonstrates that the BR-PT-TVSQ has construct validity, featuring three dimensions and acceptable levels of internal consistency, convergent validity and discriminant validity. These forms of validity evidence ensure that the structure of the instrument accurately represents the outcomes and dimensions being investigated, making it suitable for clinical use. What are the potential or actual clinical implications of this work? The BR-PT-TVSQ is the only tool available in Brazilian Portuguese that has verified construct validity for the early assessment of symptoms related to voice, swallowing and neck discomfort in patients undergoing thyroidectomy. This questionnaire aids in decision-making and the rehabilitation process.