Impact of Defined Risk Factors on Degree of Urinary Stress Incontinence and Sling Outcome: A Retrospective Cohort Analysis

Abstract

Urinary stress incontinence is a distressing condition that has a severe impact on quality of life for most affected women. The insertion of the suburethral tension-free vaginal tape (TVT) is regarded as the gold-standard surgical treatment option. It is unclear whether all women with severe SUI benefit equally from TVT. Thus, the aim of our study was to identify risk factors for severe SUI and determine whether successful the resolution of incontinence after a TVT procedure was different in women with a higher degree of SUI. In total, 168 women were included in this retrospective cohort study. Women with severe SUI showed a significantly lower maximum urethral closure pressure (MUCP) (median 53 cmH2O in moderate vs. 39 cmH2O in severe, p = 0.001) and higher BMI (median 26.1 kg/m2 in moderate vs. 28.5 kg/m2 in severe, p = 0.045). Sonographic bladder neck funneling was detected significantly more often in women with severe SUI (27% in moderate vs. 57% in severe, p = 0.004). Lower MUCP and higher BMI were identified as significant predictors of severe SUI (p < 0.032). There was no difference in parity, age, functional urethral length and negative urethral stress pressure. Overall postoperative continence after the insertion of TVT was 91.9%. We found no significant difference in postoperative continence between women with severe vs. moderate SUI, suggesting that in our cohort the success of TVT was not significantly affected by the severity of SUI. In our cohort, low MUCP and high BMI were shown to be significant predictors of SUI severity. Nevertheless, treatment success of SUI with TVT did not differ substantially in women with more severe SUI.