Turkish Adaptation of Four Questionnaires for Patients with Overactive Bladder: The Overactive Bladder Questionnaire...

This study aimed to translate, culturally adapt, and evaluate the psychometric properties of four patient-reported outcome measures developed for individuals with overactive bladder (OAB): the Overactive Bladder Questionnaire (OAB-Q), Urgency Questionnaire (UQ), Primary Overactive Bladder Symptom Questionnaire (POSQ), and Patient Perception of Bladder Condition (PPBC).

The study included 120 women diagnosed with OAB. The Turkish adaptation of the instruments was conducted using a standardized forward-backward translation and cultural adaptation process, and content validity was assessed on the basis of expert opinions. For test-retest reliability, participants completed the questionnaires twice with a 2-week interval. Internal consistency was evaluated using Cronbach's alpha coefficient, while test-retest reliability was examined using intraclass correlation coefficients (ICC) and Cohen's kappa analysis. Construct validity was assessed using exploratory and confirmatory factor analyses. Convergent and discriminant validity were analyzed using the King's Health Questionnaire (KHQ), bladder diary variables, and the pad test.

Cronbach's alpha coefficients ranged from 0.781 to 0.945 for the OAB-Q and from 0.795 to 0.910 for the UQ. The total Cronbach's alpha value for the POSQ was 0.70. Test-retest results demonstrated moderate to high temporal stability across all instruments. Factor analyses supported the original factor structures of the scales. A significant and moderate correlation was found between the POSQ and the KHQ, whereas the PPBC demonstrated independent construct validity by reflecting patients' subjective perceptions of their bladder condition.

The Turkish versions of these four instruments are valid, reliable, and culturally appropriate assessment tools for evaluating OAB symptoms, with potential utility in both clinical practice and research settings.