External validation of de novo stress urinary incontinence prediction model after vaginal prolapse surgery

Persistent and De Novo Stress Urinary Incontinence After Minimally Invasive Sacrocolpopexy

IMPORTANCE

Data on stress urinary incontinence (SUI) after minimally invasive sacrocolpopexy (SCP) with or without midurethral sling placement are limited.

OBJECTIVE

The aim of the study was to determine the incidence of SUI after minimally invasive sacrocolpopexy.

STUDY DESIGN

This was a secondary analysis of 2 randomized clinical trials of participants undergoing SCP. Participants completed symptom assessment and urodynamic testing. Participants underwent SCP with or without midurethral sling placement. Preoperatively, participants were defined as having symptomatic SUI, occult SUI, or no SUI. Participants completed the Pelvic Floor Distress Inventory-20 at 6 and 12 months postoperatively and were categorized as having persistent SUI in the setting of symptomatic or occult SUI or de novo SUI.

RESULTS

Eighty-one participants were included. Sixty-one participants met inclusion criteria for the persistent SUI analysis: 42 participants with symptomatic SUI and 19 participants with occult SUI. There were 20 participants in the de novo SUI group. The overall incidence of persistent SUI was 26.2% (95% confidence interval [CI], 15.8%-39.1%) with 33.3% (95% CI, 19.6%-49.6%) of symptomatic and 10.5% (95% CI, 1.5%-33.1%) of occult participants. Bothersome symptoms were defined as "moderately" or "quite a bit" bothered postoperatively. Of participants with symptomatic SUI, 14.3% participants were bothered and no participants underwent retreatment. No patient with occult SUI was bothered; however, 1 patient underwent retreatment. The incidence of de novo SUI was 45% (95% CI, 23.1%-68.5%). No patient in the de novo SUI group was bothered or underwent SUI treatment.

CONCLUSIONS

Approximately 1 in 4 participants reported persistent SUI. Almost 50% reported de novo SUI. However, few participants were bothered or underwent treatment.

External validation of the de novo stress urinary incontinence prediction model after pelvic organ prolapse surgery in Korean women: a retrospective cohort study

BACKGROUND

De novo stress urinary incontinence (SUI) may develop following pelvic organ prolapse surgery. Performing prophylactic continence surgery may reduce the risk of de novo SUI and subsequent continence surgery; however, it may increase the risk of complications. Therefore, many surgeons try to identify women at high risk for de novo SUI and perform continence surgery selectively. Recently, a model for predicting the risk of de novo SUI after prolapse surgery was developed using data from the Outcomes following vaginal Prolapse repair and midUrethral Sling (OPUS) trial; its prediction accuracy was significantly better than that of the stress test alone. However, few studies have verified its prediction accuracy in discrete populations. The aim of this study was to externally validate the prediction model for de novo SUI after prolapse surgery in Korean women.

METHODS

This retrospective cohort study included 320 stress-continent women who underwent prolapse surgery for pelvic organ prolapse quantification stage 2-4 anterior or apical prolapse and who completed a 1-year follow-up. Predicted probabilities by the de novo SUI online risk calculator were compared with observed outcomes and quantitated using the model's area under the curve and calibration plot. Subgroup analyses were also performed by the type of prolapse surgery.

RESULTS

The de novo SUI prediction model showed moderate discrimination in our study cohort; area under the curve (95% confidence interval) = 0.73 (0.67-0.78) in the whole cohort, 0.69 (0.61-0.78) in women who underwent native tissue repair or colpocleisis, and 0.74 (0.65-0.82) in those who underwent sacrocolpopexy. Calibration curves demonstrated that the model accurately predicted the observed outcomes of de novo SUI in women who underwent native tissue repair or colpocleisis but underestimated outcomes in those who underwent sacrocolpopexy. The predicted probability cutoff points corresponding to an actual risk of 50% were 40% in women who underwent native tissue repair or colpocleisis and 30% in those who underwent sacrocolpopexy.

CONCLUSIONS

The de novo SUI prediction model is acceptable for use in Korean women and may aid in shared decision-making regarding prophylactic continence procedure at the time of prolapse surgery.

International Urogynecology consultation chapter 2 committee 3: the clinical evaluation of pelvic organ prolapse including investigations into associated morbidity/pelvic floor dysfunction

INTRODUCTION AND HYPOTHESIS

This manuscript from Chapter 2 of the International Urogynecology Consultation (IUC) on Pelvic Organ Prolapse (POP) reviews the literature involving the clinical evaluation of a patient with POP and associated bladder and bowel dysfunction.

METHODS

An international group of 11 clinicians performed a search of the literature using pre-specified search MESH terms in PubMed and Embase databases (January 2000 to August 2020). Publications were eliminated if not relevant to the clinical evaluation of patients or did not include clear definitions of POP. The titles and abstracts were reviewed using the Covidence database to determine whether they met the inclusion criteria. The manuscripts were reviewed for suitability using the Specialist Unit for Review Evidence checklists. The data from full-text manuscripts were extracted and then reviewed.

RESULTS

The search strategy found 11,242 abstracts, of which 220 articles were used to inform this narrative review. The main themes of this manuscript were the clinical examination, and the evaluation of comorbid conditions including the urinary tract (LUTS), gastrointestinal tract (GIT), pain, and sexual function. The physical examination of patients with pelvic organ prolapse (POP) should include a reproducible method of describing and quantifying the degree of POP and only the Pelvic Organ Quantification (POP-Q) system or the Simplified Pelvic Organ Prolapse Quantification (S-POP) system have enough reproducibility to be recommended. POP examination should be done with an empty bladder and patients can be supine but should be upright if the prolapse cannot be reproduced. No other parameters of the examination aid in describing and quantifying POP. Post-void residual urine volume >100 ml is commonly used to assess for voiding difficulty. Prolapse reduction can be used to predict the possibility of postoperative persistence of voiding difficulty. There is no benefit of urodynamic testing for assessment of detrusor overactivity as it does not change the management. In women with POP and stress urinary incontinence (SUI), the cough stress test should be performed with a bladder volume of at least 200 ml and with the prolapse reduced either with a speculum or by a pessary. The urodynamic assessment only changes management when SUI and voiding dysfunction co-exist. Demonstration of preoperative occult SUI has a positive predictive value for de novo SUI of 40% but most useful is its absence, which has a negative predictive value of 91%. The routine addition of radiographic or physiological testing of the GIT currently has no additional value for a physical examination. In subjects with GIT symptoms further radiological but not physiological testing appears to aid in diagnosing enteroceles, sigmoidoceles, and intussusception, but there are no data on how this affects outcomes. There were no articles in the search on the evaluation of the co-morbid conditions of pain or sexual dysfunction in women with POP.

CONCLUSIONS

The clinical pelvic examination remains the central tool for evaluation of POP and a system such as the POP-Q or S-POP should be used to describe and quantify. The value of investigation for urinary tract dysfunction was discussed and findings presented. The routine addition of GI radiographic or physiological testing is currently not recommended. There are no data on the role of the routine assessment of pain or sexual function, and this area needs more study. Imaging studies alone cannot replace clinical examination for the assessment of POP.

External validation of a model predicting de novo stress urinary incontinence after pelvic organ prolapse surgery

AIMS

De novo stress urinary incontinence (SUI) may develop after surgical correction of advanced pelvic organ prolapse (POP) in otherwise continent women. Prediction of which women with POP will develop SUI after the prolapse is corrected is difficult. We aimed to externally validate a previously described prediction model for de novo SUI after performing vaginal surgery for POP and to assess its clinical performance when used as a diagnostic test.

METHODS

This retrospective cohort study included all continent women with ≥ stage 2 POP according to the POP-Quantification System who underwent reconstructive surgery for symptomatic POP. Surgical correction for prolapse of the anterior and/or apical compartment was performed using native tissue or vaginal mesh repair. Seven parameters of the prediction model including age at surgery, number of vaginal births, body mass index, preoperative stress test, previous continence procedure history, urine leakage associated with a feeling of urgency, and diagnosis of diabetes for each patient was provided from the medical records, and the predicted probability of de novo SUI after POP surgery was calculated. The primary outcome used to validate the prediction model was the presence of SUI 1 year after surgery. A receiver operating characteristic (ROC) curve was generated to evaluate the predictive accuracy. A cut-off point of ≥ 50% was used to evaluate its clinical performance as a diagnostic test.

RESULTS

Two hundred twenty-five women were suitable for analysis. The rate of de novo SUI was 5.3%. The predictive accuracy of the model in our population using the area under the ROC curve was 0.56 (95% confidence interval = 0.35-0.77). Its performance as a diagnostic test was poor (positive likelihood ratio = 1.20 and negative likelihood ratio = 0.89).

CONCLUSIONS

Our clinical validation of this model showed that it did not have good clinical performance. We need future prospective studies to identify and incorporate additional markers of de novo SUI to improve the prediction capacity.

Predictors of occult stress urinary incontinence

BACKGROUND

Causes for occult stress urinary incontinence (SUI) are poorly recognised.

AIMS

To explore the mechanisms behind occult SUI. We hypothesised that cystocele type affects the risk of occult SUI.

MATERIALS AND METHODS

We conducted a retrospective, cross-sectional study on 878 consecutive women assessed at a tertiary urogynaecologic clinic between July 2016 and November 2018. The population of this study consisted of 424 women with urodynamic stress incontinence. Women with previous anti-incontinence surgery were excluded. All women underwent a standardised interview, clinical examination and urodynamic testing. Translabial ultrasound was used to categorise cystoceles into Green type II (cystocele with open retrovesical angle) and Green type III (cystocele with intact retrovesical angle). We compared women with overt SUI to those with occult SUI (defined as stress incontinence only observed after prolapse reduction) for demographic characteristics, urodynamic findings and functional anatomy. Predictors for occult SUI were identified with a multivariable logistic regression model.

RESULTS

Of 424 women, 362 (85%) had overt, and 62 (15%) occult SUI. There were 136 (32%) women who had a significant cystocele on imaging; 57 (42%) were classified as type II and 79 (58%) as type III. On multivariable regression, age and cystocele type were significantly associated with occult SUI. Odds for occult SUI was 10.9 times higher with type III (cystocele with an intact retrovesical angle) than with type II cystocele (cystocele with an open retrovesical angle; 95% CI 1.3-90.9).

CONCLUSIONS

Cystocele type affects the risk of occult SUI. Type III cystocele (intact retrovesical angle) associates with occult SUI.

Artificial intelligence (AI) in urology-Current use and future directions: An iTRUE study

OBJECTIVE

Artificial intelligence (AI) is used in various urological conditions such as urolithiasis, pediatric urology, urogynecology, benign prostate hyperplasia (BPH), renal transplant, and uro-oncology. The various models of AI and its application in urology subspecialties are reviewed and discussed.

MATERIAL AND METHODS

Search strategy was adapted to identify and review the literature pertaining to the application of AI in urology using the keywords "urology," "artificial intelligence," "machine learning," "deep learning," "artificial neural networks," "computer vision," and "natural language processing" were included and categorized. Review articles, editorial comments, and non-urologic studies were excluded.

RESULTS

The article reviewed 47 articles that reported characteristics and implementation of AI in urological cancer. In all cases with benign conditions, artificial intelligence was used to predict outcomes of the surgical procedure. In urolithiasis, it was used to predict stone composition, whereas in pediatric urology and BPH, it was applied to predict the severity of condition. In cases with malignant conditions, it was applied to predict the treatment response, survival, prognosis, and recurrence on the basis of the genomic and biomarker studies. These results were also found to be statistically better than routine approaches. Application of radiomics in classification and nuclear grading of renal masses, cystoscopic diagnosis of bladder cancers, predicting Gleason score, and magnetic resonance imaging with computer-assisted diagnosis for prostate cancers are few applications of AI that have been studied extensively.

CONCLUSIONS

In the near future, we will see a shift in the clinical paradigm as AI applications will find their place in the guidelines and revolutionize the decision-making process.

Determining the risk factors and characteristics of de novo stress urinary incontinence in women undergoing pelvic organ prolapse surgery: A systematic review

OBJECTIVE

Stress urinary incontinence (SUI) is a common problem in women that affects their quality of life. According to the current evidence, 15%-50% of severe pelvic organ prolapse (POP) surgeries lead to de novo urinary incontinence (UI). This study aimed at determining the risk factors and characteristics of de novo SUI after POP surgeries in a systematic review.

MATERIAL AND METHODS

We conducted a systematic search of articles in English related to the risk of UI after POP surgery published until December 2019 in the selected bibliographic databases, including PubMed, EMBASE, Scopus, Cochrane Library, and ProQuest.

RESULTS

The initial search resulted in 2,363 studies, and after reviewing the titles and abstracts, 146 studies were identified. Moreover, 2 independent reviewers, using the Joanna Briggs Institute checklists, evaluated the risk of biases in the selected studies. Finally, 40 studies met the inclusion criteria. The most important predictors of UI after POP surgery were positive pessary testing, age >50 years, and maximum urethral closure pressure (MUCP) <60 cmH₂O.

CONCLUSION

Positive pessary testing, older age, and low MUCP were the most important risk factors for de novo incontinence after POP surgeries.

Complications and reoperation after pelvic organ prolapse, impact of hysterectomy, surgical approach and surgeon experience

INTRODUCTION AND HYPOTHESIS

The surgical treatment of pelvic organ prolapse (POP) is associated with specific complications. Our primary objective was to assess the recurrence requiring reoperation after prolapse surgery, and our secondary objectives were to assess the early complications and secondary surgery for urinary incontinence.

METHODS

Retrospective study of a population-based cohort of all hospital or outpatient stays including POP surgery from 2008 to 2014, using the French nationwide discharge summary database. We calculated the rates of hospital readmission following surgery as well as the rates of reoperation for recurrent prolapse and subsequent procedures performed for urinary incontinence.

RESULTS

A total of 310,938 patients had undergone surgery for POP. Two hundred fourteen (0.07%) patients died, and 0.45% were admitted to an intensive care unit; 4.4% of the patients underwent surgery for the recurrence of prolapse. Concomitant hysterectomy in the first surgery was associated with a significantly lower risk of POP surgery recurrence: (hazard ratio (HR) [95% confidence interval (CI)] = 0.51 [0.49; 0.53]). A total of 1386 (2.5%) patients were readmitted to the hospital for early (30-day) complications of prolapse surgery. The most frequent reasons for early readmission were local infection (32.8%), hemorrhage (21.4%) and pain (17.2%). Risk factors for complications were obesity, hospitals with low levels of activity and associated incontinence surgery; 4.6% of the patients required secondary surgery for urinary incontinence; obesity was a risk factor (HR [95% CI] = 1.12 [1.01; 1.24]), and the vaginal route was a protective factor (odds ratio = 1.86 for laparoscopy, 1.44 for laparotomy and 1.25 for multiple approaches).

CONCLUSIONS

POP surgery is associated with low rates of complication and recurrence. Complications occurred most commonly following combined surgeries for both prolapse and incontinence and in hospitals with low surgical volumes. Concomitant hysterectomy appears to be protective for the need for additional prolapse surgery, and the vaginal route leads to a lower frequency of secondary surgery for urinary incontinence.