Italian versions of the Urogenital Distress Inventory-6 and Incontinence Impact Questionnaire-7: translation and validation in women with urinary incontinence

Purpose: To culturally adapt and validate the Urogenital Distress Inventory-6 and Incontinence Impact Questionnaire-7 (short forms) for use in Italian-speaking women with urinary incontinence. Methods: We developed Italian versions of the two questionnaires through forward-backward translation, expert review and cognitive interviews. We then administered them to 100 women with urinary incontinence (mean age 58.02 +/- 11.9 years) to assess the internal consistency (Cronbach's alpha), test-retest reliability (intraclass correlation coefficient), standard error of measurement, minimum detectable change, and construct validity by hypothesis testing. Results: No difficulties in acceptability emerged. Internal consistency was 0.61 for Urogenital Distress Inventory-6 and 0.88 for Incontinence Impact Questionnaire-7. Test-retest reliability was respectively 0.79 and 0.91. The minimum detectable change was respectively 22.9 and 18.1 points (on a 0-100 scale). Nine out of 10 a priori hypotheses regarding construct validity were confirmed. Conclusions: The Italian versions of the Urogenital Distress Inventory-6 and Incontinence Impact Questionnaire-7 showed reliability levels in line with the literature and good construct validity. Thus, we think that the present study extends the evidence for both questionnaires as useful tools for assessing women with urinary incontinence.

Automated summary

This study highlights the importance of culturally adapting and validating assessment tools for urinary incontinence in Italian-speaking women. The Italian versions of Urogenital Distress Inventory-6 and Incontinence Impact Questionnaire-7 demonstrated good internal consistency, test-retest reliability, and construct validity, supporting their usefulness as tools for assessing women with urinary incontinence.