Cost-effectiveness Analysis of Early Sling Loosening Versus Delayed Sling Lysis in the Management of Voiding Dysfunction After Midurethral Sling Placement

Abstract

Objective The aim of this study was to perform a cost-effectiveness analysis comparing the management for ongoing voiding dysfunction after midurethral sling placement, including early sling loosening and delayed sling lysis. Methods A Markov model was created to compare the cost-effectiveness of early sling loosening (2 weeks) versus delayed sling lysis (6 weeks) for the management of persisting voiding dysfunction/retention after midurethral sling placement. A literature review provided rates of resolution of voiding dysfunction with conservative management, complications, recurrent stress urinary incontinence, or ongoing retention, as well as quality-adjusted life years (QALYs). Costs were based on 2020 Medicare reimbursement rates. Incremental cost-effectiveness ratios were compared using a willingness-to-pay threshold of $100,000/QALY. One-way and probabilistic sensitivity analyses were performed. Results At 1 year, early sling loosening resulted in increased costs ($3,575 vs $1,836) and higher QALYs (0.948 vs 0.925) compared with delayed sling lysis. This translated to early sling loosening being the most cost-effective strategy, with an incremental cost-effectiveness ratio of $74,382/QALY. The model was sensitive to multiple variables on our 1-way sensitivity analysis. For example, delayed sling lysis became cost-effective if the rate of voiding dysfunction resolution with conservative management was greater than or equal to 57% or recurrent stress urinary incontinence after early loosening was greater than or equal to 9.6%. At a willingness-to-pay threshold of 100,000/QALY, early sling loosening was cost-effective in 82% of microsimulations in probabilistic sensitivity analysis. Conclusions Early sling loosening represents a more cost-effective management method in resolving ongoing voiding dysfunction after sling placement. These findings may favor early clinical management in patients with voiding dysfunction after midurethral sling placement.