Cross-cultural adaptation to Brazilian Portuguese and assessment of the measurement properties of the Questionnaire for Urinary Incontinence Diagnosis (QUID)

Abstract

ObjectiveThis study aimed to adapt the Questionnaire for Urinary Incontinence Diagnosis (QUID) into Brazilian Portuguese (QUID-Br) and evaluate its measurement properties, given as reliability, validity, and responsiveness in women with urinary incontinence. Study designIt was a methodological study which enrolled 168 women (mean age = 55.1, standard deviation = 17.9 years old). Translation and cross-cultural adaptation were done and subsequently analysis of the measurement properties of QUID-Br were tested: structural validity (by exploratory and confirmatory factory analysis) internal consistency (Cronbach’s α) construct validity (Pearson Correlation), and test-retest reliability (Intraclass Correlation Coefficient). ResultsThe QUID-Br two-factor was confirmed showing two domains with three items each: stress urinary incontinence (SUI) and urge urinary incontinence (UUI). Furthermore, QUID-Br showed acceptable internal consistency for both scales (Cronbach’s α > 0.70), reliability [intraclass correlation coefficient (ICC = 0.85 for SUI and 0.87 for UUI)] with 95 % confidence interval (CI) and construct validity - with all the hypothesis raised a priori being confirmed. ConclusionsThe results of the present investigation showed that the QUID-Br is a valid, reliable, and consistent instrument to be administered to Brazilian women and its use is recommended in clinical practice and research.