The differential diagnosis of urinary symptoms may allow health professionals to establish a therapeutic objective and to choose the appropriate treatment for the patient's complaint. The aim of this study was to cross-culturally adapt the Three Incontinence Questionnaire (3IQ) into Brazilian Portuguese (3IQ-Br) and to analyze test-retest reliability, construct, and criterion validity in women.
The cross-cultural adaptation of the 3IQ-Br included forward-translation, back-translation, and consensus among an expert committee. Participants with and without urinary incontinence (UI) completed the 3IQ-Br, King's Health Questionnaire (KHQ), and Questionnaire for Female Urinary Incontinence Diagnosis (QUID-Br). Only women with UI answered 3IQ-Br after 7-10 days. Test-retest reliability and construct validity were analyzed using the Cohen linear kappa (k). The 3IQ-Br accuracy was analyzed using the area under the curve (AUC) of the receiver-operating characteristic (ROC) curve, considering the sensitivity and specificity to correctly classify women with and without UI.
The reliability of each question from the 3IQ-Br was considered substantial in the test-retest. The agreement among 3IQ-Br, QUID-Br, and KHQ was almost perfect for UI diagnosis (k > 0.8). The 3IQ-Br was considered to have good accuracy in distinguishing women with UI considering the KHQ (AUC 0.83, 95% confidence interval [CI] 0.78 to 0.87, p < 0.001), and fair to the QUID-Br (AUC 0.73, 95% CI 0.68 to 0.78; p < 0.001).
The results of this study showed that this version of the 3IQ-Br has acceptable measurement properties for identifying and differentiating UI symptoms in Brazilian women.
International urogynecology journal. 2022 Jan 05 [Epub ahead of print]
Michele Elisabete Rúbio Alem, Jordana Barbosa da Silva, Ana Carolina Sartorato Beleza, Thais Cristina Chaves, Patricia Driusso
Women's Health Research Laboratory, Physical Therapy Department, Federal University of São Carlos, Rodovia Washington Luís, 235 km, São Carlos, SP, CEP 13565-905, Brazil., Physical Therapy Department, Federal University of São Carlos, São Carlos, São Paulo, Brazil., Women's Health Research Laboratory, Physical Therapy Department, Federal University of São Carlos, Rodovia Washington Luís, 235 km, São Carlos, SP, CEP 13565-905, Brazil. .