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Overactive Bladder Symptoms after Transobturator Sling Surgery for Pure Stress Urinary Incontinence: A Cross-Sectional Comparative Study

Introduction: Transobturator tape (TOT) surgery has been associated with increased overactive bladder (OAB) although much controversy exists. Methods: In a cross-sectional study, women who underwent TOT surgery for pure stress incontinence (MonarcTM) answered the 6 questions of the symptom bother (SB) subscale of the OAB questionnaire – short form (OABq-SF) and an additional question regarding whether symptoms began after surgery. Women with SB score over the 4th quartile (≥30/100) were reassessed after a longer follow-up. Patients from primary care were recruited as controls. Results: We recruited 213 patients (135 in the TOT group and 78 age-adjusted controls). The mean age of operated patients was 58.7 ± 10.1 years with a mean follow-up of 25.9 ± 13.2 months. OABq-SF SB scores did not differ between the TOT group and controls (respectively, 18.5 ± 30 and 15.5 ± 6.7, p = 0.202). A total of 48% patients reported no relationship between symptoms and surgery. Highly symptomatic operated patients were reassessed after a longer follow-up (46.3 ± 10.6 months). The mean score in the second follow-up (n = 25) was not statistically different from the first assessment (46.4 ± 22.7 and 58.1 ± 19.8, p = 0.059). Conclusions: Women who underwent TOT surgery did not show increased OAB SB scores when compared to controls. Our study suggests that OAB symptoms may thus be present but overlooked during initial clinical assessment.