Risk Factors for Polypropylene Midurethral Sling Extrusion: A Case-Control Study

Abstract

Objective: To identify risk factors associated with surgical revision of midurethral sling (MUS) due to mesh extrusion.

Materiald and methods: This is a case-control study identifying women who underwent primary surgical revision of polypropylene MUS for vaginal mesh extrusion from 2001 to 2016. Cases of surgical revision were compared to a randomly selected control group in a 1:5 ratio. Patient demographics and clinical characteristics were compared and multivariate logistic regression modeling was performed to analyze the relationships between risk factors and vaginal mesh extrusion.

Results: In total, 64 cases were identified and compared to 400 controls. The average subject was 51.7 years old (range, 30-78) with a body mass index (BMI) of 27.9 kg/m² (range, 23.6-30.2) at the time of surgical revision. The median time to MUS revision was 318 days (interquartile range, 144-1355 days). Surgical revision was associated with current smokers (odds ratio [OR] = 5.43 [95% confidence interval [CI] 2.86, 10.31]), a BMI under 30 kg/m² (OR = 4.37 [95% CI = 2.05, 9.36]), age under 55 years (OR = 2.02, [95% CI = 1.13, 3.61]), a retropubic sling (OR = 2.10 [95% CI = 1.14, 3.88]), and fibromyalgia (OR = 3.33 [95% CI 1.12, 9.95]).

Conclusion: Smoking status, age under 55 years, BMI below 30 kg/m², fibromyalgia, and retropubic approach were factors associated with surgical revision of MUS due to vaginal mesh extrusion. These findings may improve counseling and patient selection.