title: Does body mass index impact passing voiding trial after midurethral sling procedures for stress urinary incontinence?
abstract: OBJECTIVE
  : To test the hypothesis that body mass index (BMI) is a factor associated with passing a voiding trial after midurethral sling procedures for stress urinary incontinence (SUI).
  
  
  METHODS
  : The medical records of 136 consecutive patients who underwent placement of either tension-free vaginal tape (TVT) or transobturator tape (TOT) for SUI during a 1-year period (September 1, 2007 to August 31, 2008) were retrospectively reviewed. Variables assessed were BMI, age, and passing or failing a postoperative urinary voiding trial. Patients with concomitant pelvic organ prolapse surgeries were not included in this analysis.
  
  
  RESULTS
  : Sixty-seven patients underwent TVT, whereas 69 had TOT procedures. In the TVT group, 30 patients (42%) were unable to void immediately postoperatively compared with 11 patients (16%) in the TOT group (P = 0.0003). The mean (SD) age and BMI of patients who failed or passed voiding trials was 58.6 (12.0) years and 28.0 (4.9) kg/m or 53.5 (12.3) years and 29.8 (5.7) kg/m, respectively. Of 38 patients who did not pass a voiding trial on the day of the procedure, 31 (82%) passed on postoperative day 1, and all patients had passed a voiding trial by postoperative day 11. The mean (SD) BMI for 7 patients who did not pass voiding trial by postoperative day 1 was 28.3 (5.2) kg/m.
  
  
  CONCLUSIONS
  : Women with higher BMIs were more likely to pass voiding trials after midurethral sling procedures. Patients who had TOT placement had greater success passing a postprocedure voiding trial than did patients who had TVT placement.
authors.affiliation: Quillen ETSU Center for Pelvic Surgery and Urogynecology, Department of Obstetrics and Gynecology, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA.
authors.forename: R Keith
authors.initials: RK
authors.lastname: Huffaker
authors.forename: Nathan
authors.initials: N
authors.lastname: Livers
authors.forename: Paul M
authors.initials: PM
authors.lastname: Yandell
authors.forename: Bobby L
authors.initials: BL
authors.lastname: Shull
authors.forename: Tristi W
authors.initials: TW
authors.lastname: Muir
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Kuehl
authors.forename: Erin T
authors.initials: ET
authors.lastname: Bird