Association Between Hemoglobin A1c and Midurethral Sling Complications in Diabetic Women: A Cohort Study

Abstract

Objective: We aimed to evaluate the association between hemoglobin A1c (HbA1c) levels and midurethral sling (MUS) complications.

Methods: This was a multihospital, retrospective cohort study from 2010 to 2020. We included all women with diabetes mellitus who underwent a synthetic mesh MUS procedure and had a preoperative HbA1c within 3 months of surgery. The primary outcome was a composite of complications, including MUS mesh exposure, surgical site granulation tissue or infection, urinary tract infection, surgical site pain beyond 6 weeks postoperatively, and MUS failure. A sensitivity analysis analyzing MUS failure alone was performed.

Results: During the study period, 109 women met the inclusion criteria. Most were White (52.2%) and had a median body mass index of 31.2 kg/m2, and 84.9% were postmenopausal. Median HbA1c was 7.2% (interquartile range, 6.3%-7.7%). Urinary tract infection was the most common complication in 12 (11.0%) women. Mesh exposure was diagnosed in 7 (6.4%) women. Seventeen (15.6%) had MUS failure. On univariate regression analysis, a higher HbA1c was associated with increased odds of composite complications (odds ratio, 1.67; 95% confidence interval, 1.20-2.32; P = 0.002) and MUS failure (odds ratio, 1.81, 95% confidence interval, 1.26-2.60; P = 0.001). On multivariate analysis, higher HbA1c levels were associated with a composite of complications and failure (P < 0.05). Based on the receiver operating characteristic curve, HbA1c greater than 8% demonstrated a specificity of 85.7% and a sensitivity of 50% for MUS failure.

Conclusions: In diabetic patients, a higher HbA1c was associated with a higher risk of MUS complications and failure. Obtaining an HbA1c within 3 months of surgery may help with risk stratification.