Liyuan Huang

Baseline urodynamic predictors of treatment failure 1 year after mid urethral sling surgery

PURPOSE We determined whether baseline urodynamic study variables predict failure after mid urethral sling surgery. MATERIALS AND METHODS Preoperative urodynamic study variables and postoperative continence status were analyzed in women participating in a randomized trial comparing retropubic to transobturator mid urethral sling. Objective failure was defined by positive standardized stress test, 15 ml or greater on 24-hour pad test, or re-treatment for stress urinary incontinence. Subjective failure criteria were self-reported stress symptoms, leakage on 3-day diary or re-treatment for stress urinary incontinence. Logistic regression was used to assess associations between covariates and failure controlling for treatment group and clinical variables. Receiver operator curves were constructed for relationships between objective failure and measures of urethral function. RESULTS Objective continence outcomes were available at 12 months for 565 of 597 (95%) women. Treatment failed in 260 women (245 by subjective criteria, 124 by objective criteria). No urodynamic variable was significantly associated with subjective failure on multivariate analysis. Valsalva leak point pressure, maximum urethral closure pressure and urodynamic stress incontinence were the only urodynamic variables consistently associated with objective failure on multivariate analysis. No specific cut point was determined for predicting failure for Valsalva leak point pressure or maximum urethral closure pressure by ROC. The lowest quartile (Valsalva leak point pressure less than 86 cm H2O, maximum urethral closure pressure less than 45 cm H2O) conferred an almost 2-fold increased odds of objective failure regardless of sling route (OR 2.23, 1.20-4.14 for Valsalva leak point pressure and OR 1.88, 1.04-3.41 for maximum urethral closure pressure). CONCLUSIONS Women with a Valsalva leak point pressure or maximum urethral closure pressure in the lowest quartile are nearly 2-fold more likely to experience stress urinary incontinence 1 year after transobturator or retropubic mid urethral sling.

The Impact of Obesity on Urinary Incontinence Symptoms, Severity, Urodynamic Characteristics and Quality of Life

PURPOSE We compared urinary incontinence severity measures and the impact of stress urinary incontinence in normal, overweight and obese women. MATERIALS AND METHODS Baseline characteristics of subjects in the SISTEr (655) and the TOMUS (597) were analyzed. Body mass index was defined as normal (less than 25 kg/m(2)), overweight (25 to less than 30 kg/m(2)) and obese (30 kg/m(2) or greater). Independent urinary incontinence severity measures included a 3-day diary including incontinence episode frequency, Urogenital Distress Inventory scores and Valsalva leak point pressure from urodynamic testing. Impact was measured using the Incontinence Impact Questionnaire. Multivariable regression models were fit for each severity measure (Urogenital Distress Inventory, incontinence episode frequency, Valsalva leak point pressure and Incontinence Impact Questionnaire) on weight category. Covariates included age, race, diabetes and variables significantly associated with body mass index on bivariate analysis. RESULTS Mean age (SD) of participants was 51.9 (10.3) in SISTEr and 52.9 (11.0) in TOMUS. In each trial 45% of subjects were obese. In SISTEr multivariable regression analyses showed that higher weight category was independently associated with higher mean Urogenital Distress Inventory score (p = 0.003), incontinence episode frequency (p <0.0001), Valsalva leak point pressure (p = 0.003) and Incontinence Impact Questionnaire score (p = 0.0004). In TOMUS higher weight category was not associated with Urogenital Distress Inventory score (p = 0.24) but was associated with higher incontinence episode frequency (p = 0.0003), Valsalva leak point pressure (p = 0.0006) and Incontinence Impact Questionnaire score (p <0.0001). CONCLUSIONS Obese women undergoing surgery for stress urinary incontinence report more incontinence episodes, more symptom distress and worse quality of life despite better measure of urethral function (higher Valsalva leak point pressure) on urodynamics.

Demographic and Clinical Predictors of Treatment Failure One Year After Midurethral Sling Surgery

OBJECTIVE: To identify clinical and demographic factors predictive of midurethral sling failure. METHODS: Overall treatment failure was defined by one or more of the following objective outcomes: a positive stress test, positive 24-hour pad test or retreatment for stress urinary incontinence (SUI); subjective outcomes: self reported SUI by the Medical, Epidemiologic and Social Aspect of Aging questionnaire, incontinent episodes by 3-day diary, or retreatment for SUI, or a combination of these. Logistic regression models adjusting for sling type and clinical site were used to predict odds of overall treatment failure after univariable analysis. Models were also fit to compare factors associated with objective failure and subjective failure only. RESULTS: Previous UI surgery (odds ratio [OR] 1.99, 95% confidence interval [CI] 1.14–3.47); maximum Q-tip excursion<30° (OR 1.89, 95% CI 1.16–3.05); Medical, Epidemiologic and Social Aspect of Aging questionnaire urge score per 10 points (OR 1.97, 95% CI 1.21–3.21); and pad weight per 10 g (OR 1.06, 95% CI 1.02–1.10) were predictors of overall failure. Having concomitant surgery (OR 0.44, 95% CI 0.22–0.90) was predictive of subjective failure only rather than objective failure. Age per 10 years (OR 1.48, 95% CI 1.14–1.90); Urogenital Distress Inventory score per 10 points (OR 1.09, 95% CI 1.02–1.17); pad weight per 10 g (OR 1.05, 95% CI 1.01–1.10) were predictive of objective failure compared with subjective failure only. Associations of risk factors and failure were similar independent of sling type (retropubic or transobturator). CONCLUSION: Twelve months after surgery, risk factors for overall and objective treatment failure were similar in women undergoing retropubic and transobturator sling procedures. This information may assist in counseling patients regarding efficacy of sling procedures and in setting expectations for women at increased odds for treatment failure. CLINICAL TRIAL REGISTRATION: ClinicalTrials.gov, www.clinicaltrials.gov, NCT00325039. LEVEL OF EVIDENCE: II

Urodynamics, the supine empty bladder stress test, and incontinence severity

Determine whether urodynamic measures of urethral function [(valsalva leak point pressure (VLPP), maximum urethral closure pressure (MUCP), functional urethral length (FUL)] and the results of the supine empty bladder stress test (SEBST) correlate with each other and with subjective and objective measures of urinary incontinence (UI).

Factors Associated With Quality of Life in Women Undergoing Surgery for Stress Urinary Incontinence

PURPOSE We determined the association of clinicodemographic factors with urinary incontinence related quality of life in women undergoing surgery for stress urinary incontinence, and compared the incontinence specific Incontinence Impact Questionnaire and the International Consultation on Incontinence Questionnaire. Secondary objectives were to evaluate the contributions of incontinence severity and sexual function on quality of life. MATERIALS AND METHODS We used baseline data on 597 women in the Trial of Mid-Urethral Slings. Tested quality of life correlates included health status and history, sexual function, and urinary incontinence type, severity and bother. RESULTS On each questionnaire lower quality of life was associated with younger age, higher body mass index, more stress urinary incontinence symptoms, and more severe and bothersome urinary incontinence symptoms. Each measure identified factors associated with lower quality of life that were not identified by the other, including Hispanic ethnicity, poor health status and more urge urinary incontinence symptoms on the Incontinence Impact Questionnaire, and prior urinary incontinence treatment and more urinary incontinence episodes daily on the International Consultation on Incontinence Questionnaire. Sexually active women had similar quality of life as well as increased incontinence episodes on each questionnaire and more sexual dysfunction on the Incontinence Impact Questionnaire only. CONCLUSIONS In women planning stress urinary incontinence surgery quality of life is associated with nonurinary incontinence factors, and with the type, severity and degree of urinary incontinence symptom bother. Many factors are associated with quality of life as measured by the Incontinence Impact Questionnaire and the International Consultation on Incontinence Questionnaire. However, more nonurinary incontinence factors were associated with quality of life when measured by the former than by the latter. More than 1 scale may be needed to evaluate quality of life after treatment for stress urinary incontinence.

Association of baseline urodynamic measures of urethral function with clinical, demographic, and other urodynamic variables in women prior to undergoing midurethral sling surgery.

To explore how baseline demographic, clinical, and urodynamic (UDS) variables correlate with measures of urethral function in women planning midurethral sling surgery.

Condition-specific quality of life 24 months after retropubic and transobturator sling surgery for stress urinary incontinence

Aims To compare quality of life (QoL) and factors associated with QoL change after retropubic (RMUS) and transobturator midurethral slings (TMUS) using the Incontinence Impact Questionnaire (IIQ) and the International Consultation on Incontinence Questionnaire (ICIQ). Methods Five hundred ninety-seven women in a multicenter randomized trial of RMUS versus TMUS were examined. The IIQ and the ICIQ were obtained at baseline and at 12 and 24 months. Repeated-measures analysis of variance tested for differences by treatment group over time. Multivariable analysis identified factors associated with QoL change at 12 months postoperative, controlling for treatment group and baseline QoL. Results Improvement in IIQ was associated with the following: treatment success, younger age, improvement in stress urinary incontinence (SUI) symptom severity, and bother (all P < 0.05). Improvement in ICIQ was associated with treatment success, younger age, improvement in SUI symptom severity and bother, lower body mass index, and no reoperation (all P < 0.05). Improvement of the IIQ was stable over time (P = 0.35) for both treatment groups (P = 0.66), whereas the ICIQ showed a small but clinically insignificant decline (P = 0.03) in both treatment groups (P = 0.51). Conclusions Postoperative QoL was improved after RMUS and TMUS. Measures of QoL functioned similarly, although more surgically modifiable urinary incontinence factors predicted improvement with the IIQ.