Identification of the Urogenital Distress Inventory-6 and the Incontinence Impact Questionnaire-7 cutoff scores in urinary incontinent women

PURPOSE: Urogenital Distress Inventory-6 (UDI-6), Incontinence Impact Questionnaire-7 (IIQ-7) and The International Consultation on Incontinence (ICIQ-SF) Short Form are used to diagnose individuals with urinary incontinence (UI) and to assess the impact of the dysfunction on patient quality of life. While ICIQ-SF has fixed cutoff values—UDI-6 and IIQ-7 do not. We aimed to find the cutoff scores for UDI-6 and IIQ-7 in women with UI. METHODS: The study involved 205 women aged between 31 and 83 years—155 with, and 50 without UI symptoms. All participants completed all three questionnaires: ICIQ-SF, UDI-6 and IIQ-7. Patients were categorized according to their ICIQ-SF scores, as symptomatic ICIQ-SF ≥ 6 (n = 134) and asymptomatic ICIQ < 6 (n = 60). The Receiver Operating Characteristics (ROC) curve was used to test how well UDI-6 allowed a discrimination between patients suffering from UI and those who do not. Area under Curve (AUC) statistic was calculated to measure the UDI-6 and IIQ-7 Total Score efficiency. RESULTS: The cutoff values were selected. On the basis of the ROC curve analysis, the UDI-6 Total Score of 33.33 and IIQ-7 Total Score of 9.52 were determined to be the optimal cutoff for distinguishing between symptomatic and asymptomatic women (AUC = 0.94-UDI-6 and 0.91-IIQ-7). CONCLUSIONS: For UDI-6 scores more than 33.33 indicate higher distress caused by UI symptoms. Moreover, the higher impact of UI on health- related quality of life is seen in women who scored 9 or more in the IIQ-7 questionnaire, and such women felt impaired quality of life. Trial registration number NCT04433715, 11.06.2020 “retrospectively registered”.