The long term predictive value of preoperative pressure flow studies in the resolution of overactive bladder after insertion of a retropubic midurethral sling

Predictors of cure and overactive bladder syndrome after a mid-urethral sling procedure in women with stress urinary incontinence

OBJECTIVES

To determine predictive factors for the cure of stress urinary incontinence (SUI) or persisting or de novo overactive bladder syndrome (OAB) after a mid-urethral sling procedure (MUS) for women with SUI, especially for menopausal women.

STUDY DESIGN

All women who had consecutively received MUS for SUI between January 2008 and July 2019 in a tertiary referral center were reviewed.

MAIN OUTCOME MEASURES

Multivariable Cox proportional hazards model or logistic regression analysis was used to assess the predictors of cure and persisting or de novo OAB after MUS.

RESULTS

A total of 385 women had undergone MUS, of whom 265 (68.8%) were menopausal. The multivariable Cox proportional hazards model revealed that age (hazard ratio = 1.04), and preoperative detrusor overactivity (hazard ratio = 2.26) were independent predictors of persisting/recurrent SUI. Among the 216 women with preoperative OAB, 109 (50.5%) experienced resolution of their OAB after MUS; and among 169 women without preoperative OAB, twenty-five (14.8%) women developed de novo OAB after MUS (p < 0.0001). Preoperative OAB (hazard ratio = 3.97), small voided volume (hazard ratio = 0.83), and preoperative detrusor overactivity (hazard ratio = 1.62) were predictors of postoperative OAB. In addition, six (1.6%) women had mesh extrusion. Parity (odds ratio = 2.08) was the sole predictor of mesh extrusion. Menopause (hazard ratio = 1.69) was a predictor of postoperative OAB in the univariate analysis. However, menopause was not a predictor of cure or OAB in the multivariable analysis.

CONCLUSIONS

Age and preoperative detrusor overactivity were independent predictors of persisting/recurrent SUI. In addition, preoperative OAB, small voided volume, and preoperative detrusor overactivity were predictors of postoperative OAB. These findings could serve as a guide for preoperative consultation for MUS.

The evolution of incontinence into resolved, refractory and de novo urgency urinary incontinence following sling placement at time of prolapse repair in a large urodynamic cohort

PURPOSE

To improve counseling in women at risk of refractory and/or de novo urgency urinary incontinence (UUI) following sling placement at time of prolapse repair, we created an outcome model to characterize changes in storage dysfunction.

MATERIALS AND METHODS

We identified 139 women who underwent urodynamics followed by sling or no sling placement at the time of prolapse repair over a 6-year period. Our primary outcome was the presence of UUI following sling placement. Data were analyzed in SAS using chi-square, Fisher's exact, Student's t-test, and Kaplan-Meier methods.

RESULTS

At baseline, the sling group had significantly higher subjective (62/81 [76.5%] vs. 18/58 [31.0%]; p<0.001), objective (62/81 [76.5%] vs. 6/58 [10.3%]; p<0.001), and occult (41/81 [50.6%] vs. 6/58 [10.3%]; p<0.001) stress urinary incontinence (SUI); and rates of subjective and objective UUI were similar to the no sling group prior to surgery. After surgery (mean follow-up 859 days) there was no difference with or without sling, in the rate of SUI (subjective, objective) and further SUI treatments (bulking agent, repeat sling). Higher rates of de novo (13/81 [16.0%] vs. 6/58 [10.3%]; p=0.454) and refractory (31/81 [38.3%] vs. 14/58 [24.1%]; p=0.048) UUI were noted in the sling group following surgery. On Kaplan-Meier analysis, a greater proportion of women in the no sling group did not report UUI at longest follow-up (hazard ratio 0.63; 95% confidence interval 0.37-1.06; p=0.081).

CONCLUSIONS

Women should be counseled on the risk of de novo and refractory UUI following sling placement at time of prolapse repair.