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Objectives@#This study aims to examine the clinical outcomes of women who underwent a midurethral sling surgery for stress urinary incontinence and compare postoperative urinary symptoms among different body mass index (BMI) groups. @*Methods@#A retrospective cohort study on results after midurethral sling surgery according to BMI was conducted at the institution of the current study from January 2010 to December 2019. The study population was classified into three groups according to patients’ BMI (in kg/m2 ) during surgery: normal weight (BMI < 23.0 kg/m2 ), overweight (BMI, 23.0–24.9 kg/m2 ), and obese (BMI ≥ 25.0 kg/m2 ). The primary outcome was the recurrence of urinary symptoms after surgery. The secondary outcomes were operation time, estimated blood loss, length of hospital stay, and postoperative complications. @*Results@#This study included 376 patients (normal weight, 148; overweight, 74; and obese women, 154) who underwent midurethral sling surgery. No significant difference was noted in urinary symptom recurrence after midurethral sling surgery. Of the patients, 6.8% (n = 10), 9.5% (n = 7), and 7.8% (n = 12) were normal weight, overweight, and obese women, respectively (P = 0.775). Moreover, operation time (P = 0.589), blood loss (P = 0.138), and complication rate (P = 0.865) showed no significant difference. @*Conclusions@#Midurethral sling surgery is effective regardless of BMI. Even when midurethral sling surgery was performed as a concomitant surgery, no significant difference in urinary symptom recurrence, operation time, intraoperative blood loss, and complication rate was noted among different BMI groups.
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