Race as a predictor of urinary incontinence and pelvic organ prolapse

Finite element analysis of female pelvic organ prolapse mechanism: current landscape and future opportunities

The prevalence of pelvic organ prolapse (POP) has been steadily increasing over the years, rendering it a pressing global health concern that significantly impacts women's physical and mental wellbeing as well as their overall quality of life. With the advancement of three-dimensional reconstruction and computer simulation techniques for pelvic floor structures, research on POP has progressively shifted toward a biomechanical focus. Finite element (FE) analysis is an established tool to analyze the biomechanics of complex systems. With the advancement of computer technology, an increasing number of researchers are now employing FE analysis to investigate the pathogenesis of POP in women. There is a considerable number of research on the female pelvic FE analysis and to date there has been less review of this technique. In this review article, we summarized the current research status of FE analysis in various types of POP diseases and provided a detailed explanation of the issues and future development in pelvic floor disorders. Currently, the application of FE analysis in POP is still in its exploratory stage and has inherent limitations. Through continuous development and optimization of various technologies, this technique can be employed with greater accuracy to depict the true functional state of the pelvic floor, thereby enhancing the supplementation of the POP mechanism from the perspective of computer biomechanics.

Restoration of bladder neck activity and levator hiatus dimensions in Asian primipara: a prospective study

Pelvic floor muscle training (PFMT) reduces the symptoms in women with pelvic floor dysfunction (PFD); however, the optimal initial timing for secondary prevention of PFD by PFMT is not clear. To identify the optimal timing in Asian primiparas with vaginal delivery, bladder neck descent (BND), levator hiatus areas, and levator hiatus distensibility and contractility were assessed in 26 nulliparous women at 36 weeks of gestation and at 2, 4, 6, and 12 weeks postpartum. We found that BND increased significantly from 2 weeks onwards until 6 weeks postpartum (p = 0.004); the levator hiatus area at rest and contraction both showed the largest value at 2 weeks postpartum (p = 0.005 and p < 0.005 respectively), followed by a continuous decrease; the hiatus area during Valsalva manoeuvre, and the levator hiatus distensibility and contractility showed the lowest value at 2 weeks postpartum, followed by a continuous increase; the changes in BND showed no correlation with the changes in distensibility or hiatus area during Valsalva manoeuvre (p = 0.073 and 0.590 respectively). In Asian primiparas with vaginal delivery, the recovery of levator hiatus and bladder neck mobility begins at 2 and 6 weeks, respectively. This information could be useful in defining the best time to begin PFMT for secondary prevention of postpartum PFD in Asian primiparous women.IMPACT STATEMENTWhat is already known on this subject? Pelvic floor muscle training (PFMT) helps to reduce symptoms of pelvic floor dysfunction (PFD), however, there are no clear time strategies for the secondary prevention of PFD by PFMT in Asian primiparas with vaginal delivery.What do the results of this study add? This study was the first longitudinal study in Asian primipara to investigate the natural regeneration of pelvic floor functions in the early postpartum period by intensively monitoring the bladder neck mobility and levator hiatus dimensions at multiple time points. We found that bladder neck descent (BND) increased significantly from 2 weeks onwards until 6 weeks postpartum; the levator hiatus area at rest and contraction both showed the largest value at 2 weeks postpartum, followed by a continuous decrease; the hiatus area during Valsalva manoeuvre, and the levator hiatus distensibility and contractility showed the lowest value at 2 weeks postpartum, followed by a continuous increase; the changes in BND showed no correlation with the changes in distensibility or hiatus area during Valsalva manoeuvre.What are the implications of these findings for clinical practice and/or further research? Our study suggested that in Asian primipara, the recovery of bladder neck mobility after vaginal delivery begins at 6 weeks postpartum, while the levator hiatus muscle begins to recover within the first 2 weeks postpartum. Therefore, it could be useful in deciding the best time to start PFMT for secondary prevention of postpartum PFD in Asian primiparous women.

Health Care Disparities Among Latina Patients Presenting With Pelvic Organ Prolapse

IMPORTANCE

This study identifies barriers, including language and insurance status, Latina patients may face in accessing urogynecology care.

OBJECTIVE

The aim of the study was to determine differences in objective prolapse severity at the time of presentation between Latina and non-Latina patients and the effect socioeconomic disparities may have on these differences.

STUDY DESIGN

This is a retrospective cohort study of patients visiting urogynecology clinics at 2 academic institutions (1 private, 1 public). Patients with symptomatic > stage II prolapse were included. Initial Pelvic Organ Prolapse Quantification examinations, leading edge of prolapse, and demographic data were extracted. We evaluated several socioeconomic factors for associations with prolapse severity in a multivariable analysis.

RESULTS

Three hundred forty-two patients were included (36% Latina). Twenty-eight percent were non-English speaking and 54% had public or no insurance. Using leading edge as the outcome, there was no objective difference in prolapse severity between the Latina and non-Latina patients. A higher proportion of patients with public insurance had more advanced prolapse compared with those with private insurance (odds ratio, 2.78; 95% confidence interval, 1.40-5.55; P < 0.01) and a higher proportion of non-English speaking had more advanced prolapse compared with English speakers (odds ratio, 2.44; 95% confidence interval, 1.12-5.34; P = 0.03).

CONCLUSIONS

Latina ethnicity was not a risk factor for more advanced prolapse at the time of initial evaluation in a urogynecology clinic. Rather, patients who were non-English speaking and had public insurance were more likely to present with more advanced prolapse. Our data suggest that language barriers and lower socioeconomic status are health care disparities for patients seeking care for prolapse.

Predicting outcomes after intradetrusor onabotulinumtoxina for non-neurogenic urgency incontinence in women

AIMS

Develop models to predict outcomes after intradetrusor injection of 100 or 200 units of onabotulinumtoxinA in women with non-neurogenic urgency urinary incontinence (UUI).

METHODS

Models were developed using 307 women from two randomized trials assessing efficacy of onabotulinumtoxinA for non-neurogenic UUI. Cox, linear and logistic regression models were fit using: (1) time to recurrence over 12 months, (2) change from baseline daily UUI episodes (UUIE) at 6 months, and (3) need for self-catheterization over 6 months. Model discrimination of Cox and logistic regression models was calculated using c-index. Mean absolute error determined accuracy of the linear model. Calibration was demonstrated using calibration curves. All models were internally validated using bootstrapping.

RESULTS

Median time to recurrence was 6 (interquartile range [IQR]: 2-12) months. Increasing age, 200 units of onabotulinumtoxinA, higher body mass index (BMI) and baseline UUIE were associated with decreased time to recurrence. The c-index was 0.63 (95% confidence interval [CI]: 0.59, 0.67). Median change in daily UUIE from baseline at 6 months was -3.5 (IQR: -5.0, -2.3). Increasing age, lower baseline UUIE, 200 units of onabotulinumtoxinA, higher BMI and IIQ-SF were associated with less improvement in UUIE. The mean absolute error predicting change in UUIE was accurate to 1.6 (95% CI: 1.5, 1.7) UUI episodes. The overall rate of self-catheterization was 17.6% (95% CI: 13.6%-22.4%). Lower BMI, 200 units of onabotulinumtoxinA, increased baseline postvoid residual and maximum capacity were associated with higher risk of self-catheterization. The c-index was 0.66 (95% CI: 0.61, 0.76). The three calculators are available at http://riskcalc.duke.edu.

CONCLUSIONS

After external validation, these models will assist clinicians in providing more accurate estimates of expected treatment outcomes after onabotulinumtoxinA for non-neurogenic UUI in women.

Racial and Ethnic Disparities in Obliterative Procedures for the Treatment of Vaginal Prolapse

OBJECTIVES

Although racial disparities are well documented for common gynecologic surgical procedures, few studies have assessed racial disparities in the surgical treatment of vaginal prolapse. This study aimed to compare the use of obliterative procedures for the treatment of vaginal prolapse across racial and ethnic groups.

STUDY DESIGN

This is a retrospective cohort study of surgical cases from 2010 to 2018 from the American College of Surgeons National Surgical Quality Improvement Program, a nationally validated database. Cases were identified by Current Procedural Terminology codes. Modified Poisson regression was used to calculate risk ratios and 95% confidence intervals, adjusting for potential confounders selected a priori.

RESULTS

We identified 45,865 surgical cases, of which 10% involved an obliterative procedure. In the unadjusted model, non-Hispanic Asian and non-Hispanic Black patients were more likely to undergo an obliterative procedure compared with non-Hispanic White patients (risk ratio [95% confidence interval], 2.4 [2.1-2.7] and 1.2 [1.03-1.3], respectively). These relative risks were largely unchanged when controlling for age, body mass index, diabetes, American Society of Anesthesiologists classification, and concurrent hysterectomy.

CONCLUSIONS

Although both obliterative and reconstructive procedures have their respective risks and benefits, the proportion of patients undergoing each procedure differs by race and ethnicity. It is unclear whether such disparities may be attributable to differences in preference or inequity in care.

Inadequacy and underreporting of study subjects' race and ethnicity in federally funded pelvic floor research

BACKGROUND

The inclusion of participants who are Black, Indigenous people of color, and participants of various ethnicities is a priority of federally sponsored research.

OBJECTIVE

This study aimed to describe the reporting of race and ethnicity in federally funded research published by the Eunice Kennedy Shriver National Institute of Child Health and Human Development-funded Pelvic Floor Disorders Network.

STUDY DESIGN

Pelvic Floor Disorders Network publications were reviewed to determine whether race or ethnicity was reported. The number of participants included in each manuscript who were identified as White, Black, Asian, American Indian or Alaska Native, Native Hawaiian or Other Pacific Islander, and "other," and the number of participants who identified as having Hispanic ethnicity were recorded. Data were analyzed by publication and by the pelvic floor disorder investigated, including urinary incontinence, pelvic organ prolapse, fecal incontinence, pregnancy-related pelvic floor disorders, and multiple pelvic floor disorders. Many publications reported on overlapping patient populations, which included primary trials and secondary analyses and studies. Data were analyzed both by counting participants every time they were reported in all papers and by counting the unique number of participants in only the original trials (primary paper published).

RESULTS

A total of 132 Pelvic Floor Disorders Network publications were published between 2003 and 2020. Of these, 21 were excluded because they were methods papers or described research without participants. Of the 111 remaining articles, 90 (81%) included descriptions of race and 55 (50%) included descriptions of ethnicity. All 13 primary trials described race and 10 of 13 (76.9%) described ethnicity. Of those publications that described race, 50 of 90 (56%) included only the categories of "White," "Black," and "Other," and 14 of 90 (16%) only described the percentage of White patients. Of the 49,218 subjects, there were 43,058 (87%) with reported race and 27,468 (56%) with reported ethnicity. Among subjects with race and ethnicity reported, 79% were reported as White, 9.9% as Black, 0.4% as Asian, 0.1% as American Indian or Alaska Native, and 4% as "other," whereas 13% were reported to be of Hispanic ethnicity. The racial and ethnic diversity varied based on the pelvic floor disorder studied (P<.01), which was driven by pregnancy-related and fecal incontinence studies because these had lower proportions of White patients than studies of other pelvic floor disorders.

CONCLUSION

Federally funded Pelvic Floor Disorders Network research does not consistently report the race and ethnicity of participants. Even in the publications that report these characteristics, Black, Indigenous people of color, and people of Hispanic ethnicity are underrepresented. Consistent reporting and recruitment of a diverse population of women is necessary to address this systemic inequity.

A Simulation Analysis of Maternal Pelvic Floor Muscle

Pelvic floor disorder (PFD) is a common disease affecting the quality of life of middle-aged and elderly women. Pelvic floor muscle (PFM) damage is related to delivery mode, fetal size, and parity. Spontaneous vaginal delivery causes especially great damage to PFM. The purpose of this study was to summarize the characteristics of PFM action during the second stage of labor by collecting female pelvic MRI (magnetic resonance imaging) data and, further, to try to investigate the potential pathogenetic mechanism of PFD. A three-dimensional model was established to study the influence factors and characteristics of PFM strength. In the second stage of labor, the mechanical responses, possible damage, and the key parts of postpartum lesions of PFM due to the different fetal biparietal diameter (BPD) sizes were analyzed by finite element simulations. The research results showed that the peak stress and strain of PFM appeared at one-half of the delivery period and at the attachment point of the pubococcygeus to the skeleton. In addition, during the simulation process, the pubococcygeus was stretched by about 1.2 times and the levator ani muscle was stretched by more than two-fold. There was also greater stress and strain in the middle area of the levator ani muscle and pubococcygeus. According to the statistics, either being too young or in old maternal age will increase the probability of postpartum PFM injury. During delivery, the entire PFM underwent the huge deformation, in which the levator ani muscle and the pubococcygeus were seriously stretched and the attachment point between the pubococcygeus and the skeleton were the places with the highest probability of postpartum lesions.

Representation of Minority Groups in Key Pelvic Floor Disorder Trials

BACKGROUND

Multicenter randomized clinical trials on pelvic floor disorders (PFDs) support evidence-based care. However, many of these studies include homogenous study populations lacking diversity. Heterogeneous sampling allows for greater generalizability while increasing knowledge regarding specific subgroups. The racial/ethnic makeup of key pelvic floor disorder (PFD) trials has not been examined.

OBJECTIVE

This study aimed to investigate racial/ethnic representation in major PFD clinical trials in comparison to racial/ethnic distribution of PFD in the National Health and Nutritional Examination Survey (NHANES).

METHODS

Demographic data were extracted from completed PFD Network (PFDN) and Urinary Incontinence Treatment Network studies, which have resulted in nearly 200 publications. Prevalence of PFD by race/ethnicity was obtained from the NHANES. A representative index (Observed "n" by PFD study/Expected "n" based on the NHANES-reported prevalence) was calculated as a measure of representation. Meta-analyses were performed for each outcome and overall with respect to race/ethnicity.

RESULTS

Eighteen PFDN/Urinary Incontinence Treatment Network studies were analyzed. White women comprised 70%-89% of PFD literature; Black women, 6%-16%; Hispanic women, 9%-15%; Asians, 0.5%-6%; and American Indians, 0%-2%. Representation of White women was higher in 13 of 18 PFDN studies compared with the NHANES prevalence data. Representation of Black women was either decreased or not reported in 10 of 18 index studies compared with the NHANES prevalence data. Hispanic women were absent or underrepresented in 7 of 18 PFDN studies compared with the prevalence data.

CONCLUSIONS

Our examination of PFDN and other landmark trials demonstrates inconsistent reporting of minority subgroups, limiting applicability with respect to minority populations. Our study suggests that PFD research would benefit from targeted sampling of minority groups.

Association between pelvic floor disorders and hernias

INTRODUCTION AND HYPOTHESIS

Connective tissue disorders may contribute to pelvic floor disorders (PFDs). Like PFDs, abdominal wall hernias are more common in patients with systemic connective tissue disorders. We conducted this study to explore the possible association between PFDs and hernias in adult women.

METHODS

We obtained the data for this study from a study of PFDs among parous women. At enrollment, stress urinary incontinence (SUI), overactive bladder (OAB), and anal incontinence (AI) were assessed using the Epidemiology of Prolapse and Incontinence Questionnaire (EPIQ) and pelvic organ prolapse (POP) was assessed through the Pelvic Organ Prolapse Quantification (POP-Q) examination. Participants were asked to report hernia surgery and list their hernia types. We compared the prevalence of PFDs in those with and without hernias using chi-square test. We used multiple regression analysis to adjust for obstetric and sociodemographic variables.

RESULTS

Among 1529 women, 79 (5.2%) reported history of hernia surgery. The prevalence of POP was 7.6% (6 cases) vs. 7.4% (107 cases), the prevalence of SUI was 7.6% (6 cases) vs. 9.9% (144 cases), the prevalence of OAB was 7.6% (6 cases) vs. 5.7% (83 cases), and the prevalence of AI was 7.6% (6 cases) vs. 10.8% (156 cases) in those with hernias compared to those without hernias, respectively. None of these differences were statistically significant. There was no association between hernias and PFDs after adjustment for type of delivery, number of deliveries, age group, primary racial background, weight category, and smoking status.

CONCLUSION

In this study, we could not find any association between hernias and PFDs.

Racial Distribution and Characterization of Pelvic Organ Prolapse in a Hospital-Based Subspecialty Clinic

OBJECTIVES

Prior literature has suggested a decreased prevalence of pelvic organ prolapse (POP) in Black women. We sought to describe POP rates by race, investigate whether specific types of prolapse differ based on race, and investigate the role of uterine weight and fibroids on POP.

METHODS

We conducted a retrospective cohort study of new patients seen between April 2017 and April 2019 at a tertiary urogynecology clinic. Variables collected included POP quantification, race, age, smoking history, medical history, gravity, parity, vaginal delivery, hysterectomy, fibroids, and uterine weight. χ2 tests were used to compare the proportions of types of POP between Black and non-Black women. Binary and ordinal logistic regression tested the association between types of prolapse and race, adjusting for covariates.

RESULTS

Nine hundred thirty-six patients were identified by ICD codes, 768 met inclusion criteria. There were 85.3% of the women identified as non-Black and 14.7% identified as Black. There were 39.8% of the Black women that had a fibroid diagnosis compared with 20.8% of non-Black women (P < 0.001). Black women had a higher median uterine weight, 112.2 g versus 56 g (P = 0.002), and median fibroid size, 3.4 cm versus 1.92 cm (P = 0.0001). 56.9% of women presented with anterior prolapse. No difference was found in POP type between Black and non-Black women after adjusting for age, body mass index, parity, and delivery route (P = 0.45).

CONCLUSIONS

Black women had increased body mass index, rates of comorbidities (diabetes and hypertension), higher uterine weight and fibroid size than non-Black women in our study. However, there was no significant difference in POP type based on race.

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.

LncRNA and mRNA Expression Profiling in the Periurethral Vaginal Wall Tissues of Postmenopausal Women with Stress Urinary Incontinence

Stress urinary incontinence (SUI) is one of the major pelvic floor disorders affecting postmenopausal women. To investigate the lncRNA and mRNA expression profiling of SUI in postmenopausal women, we used a microarray analysis to examine the differentially expressed long noncoding RNAs (lncRNAs) and messenger RNAs (mRNAs) in the periurethral vaginal wall of postmenopausal women with SUI. A total of 8840 lncRNAs and 7102 mRNAs were dysregulated in the two groups (absolute fold change ≥ 2 and P < 0.05). The expression levels of five randomly selected lncRNAs and mRNAs were validated by quantitative real-time PCR. A functional analysis revealed that several lncRNAs are involved in the lysosome pathway associated with extracellular matrix (ECM) remodeling. In addition, we also found several mRNAs involved in fibroblast pseudopodia formation, fibroblast growth, and the regulation of smooth muscle cell differentiation in the urinary tract. Our study offers essential data regarding differentially expressed lncRNAs and mRNAs and may provide new potential candidates for the study of SUI.

Pelvic organ prolapse in Caucasian and East Asian women: a comparative study

OBJECTIVE

Ethnicity has been suggested to be a significant risk factor for pelvic organ prolapse (POP); yet, pelvic organ descent in different ethnic groups, especially in Asian populations, is not well studied. The aim of this study was to compare prolapse stages, pelvic organ descent and hiatal dimensions between East Asian and Caucasian women presenting with symptoms of POP.

METHODS

This was a prospective observational study of East Asian and Caucasian women presenting with symptoms of POP to a tertiary urogynecology clinic in, respectively, Hong Kong and Sydney. Demographic data, prolapse symptoms and prolapse stage were assessed. Physical examination was performed using the pelvic organ prolapse quantification (POP-Q) system. All women underwent transperineal ultrasound using Voluson systems. Offline analysis of four-dimensional ultrasound volume data was performed at a later date, by one operator blinded to all clinical data, to ascertain pelvic organ descent and hiatal dimensions on Valsalva maneuver. Levator muscle avulsion was assessed in volumes obtained on pelvic floor muscle contraction. Multiple logistic regression analysis was performed to assess factors associated with prolapse on clinical and ultrasound examinations.

RESULTS

A total of 225 East Asian women were included between July 2012 and February 2014 from the Hong Kong clinic and 206 Caucasian women between January 2015 and July 2016 from the Sydney clinic. There was no significant difference in the overall staging of prolapse. However, in East Asian women, compared with Caucasians, apical compartment prolapse was more common (99.6% vs 71.8%, P < 0.001) and posterior compartment prolapse less common (16.9% vs 48.5%, P < 0.001) on POP-Q examination. On Valsalva maneuver, the position of the uterus was lower in East Asian than in Caucasian women (-11.3 vs 1.35 mm, P < 0.001), while the rectal ampulla position was lower in Caucasians than in East Asians (-10.6 vs - 4.1 mm, P < 0.001). On multiple regression analysis, Caucasian ethnicity was a significant factor for lower risk of apical compartment prolapse on clinical assessment (odds ratio (OR), 0.01; P < 0.001) and on ultrasound (OR, 0.13; P < 0.001), and for a higher risk of posterior compartment prolapse on clinical assessment (OR, 4.36; P < 0.001) and of true rectocele on ultrasound (OR, 8.14; P < 0.001).

CONCLUSIONS

East Asian women present more commonly with uterine prolapse while Caucasians show more often posterior compartment prolapse. Ethnicity was a significant predictor of type of prolapse on multivariate analysis. Copyright © 2018 ISUOG. Published by John Wiley & Sons Ltd.

Racial Differences in Pelvic Organ Prolapse Symptoms Among Women Undergoing Pelvic Reconstructive Surgery for Prolapse

OBJECTIVE

The aim of this study was to determine if there is a difference in Pelvic Floor Disability Index Questionnaire (PFDI-20) scores between black and white women seeking surgical management for pelvic organ prolapse (POP).

METHODS

A retrospective cohort study of 232 women who underwent pelvic reconstructive surgery with apical suspension for POP was performed. Demographic and clinical data were collected. All women completed the PFDI-20 and had a Pelvic Organ Prolapse Quantification examination at the initial consultation. Appropriate statistical tests were used to compare black and white women. Multivariable regression models adjusting for demographic and clinical variables were developed to determine the independent relationship between race and POP symptoms.

RESULTS

In our cohort, 174 (75%) were white and 58 (25%) were black. Compared with white women, black women had higher parity, body mass index, Charlson Comorbidity Index score, and anterior POP stage. White women had higher total PFDI-20 scores corresponding to higher scores on all symptom subscales. After controlling for potential confounders, white race and prior anti-incontinence surgery remained associated with higher total PFDI scores. Higher Urogenital Distress Inventory 6 scores were significantly associated with white race, prior anti-incontinence procedures, and increasing body mass index, whereas higher CRADI-8 scores were associated with prior anti-incontinence surgery and higher POP stages.

CONCLUSIONS

White women appeared to have more overall symptom bother from prolapse, as well as urinary symptoms, as compared with black women, when assessed by validated questionnaire tools in a cohort of patients who underwent prolapse surgery. Further research is required to determine if racial differences in symptoms translate to differences in outcomes.

Prevalence, risk factors, and treatment for women with stress urinary incontinence in a racially and ethnically diverse population

AIMS

Black women may have lower rates of SUI than Whites, whereas the rate of SUI in Hispanic women varies. Most studies have been conducted in predominantly White populations, making it difficult to evaluate race and SUI. The objective of this study was to estimate the prevalence of SUI in a diverse population and examine racial/ethnic differences in risk factors and treatment.

METHODS

This is a retrospective cohort study of women ≥21 years with SUI seen at our medical center from June 1, 2013 to June 30, 2016. Risk factors measured included age, BMI, SES, diabetes, smoking, Charlson comorbidity index, hysterectomy, and pregnancy. SUI management included consultation with a specialist and active treatment (physical therapy, pessary use, or incontinence surgery). ANOVA, chi-square, and multivariable logistic regression were used to evaluate race and SUI.

RESULTS

The prevalence rate was 4.65 per 100 women (5557 cases/119 452 women). Hispanics comprised the majority (54.13% n = 3008), followed by Blacks (23.54% n = 1308), Other (12.74% n = 708), and Whites (9.59% n = 532). Black women were less likely to consult with a specialist or undergo treatment compared to White and Hispanic women, which persisted in multivariable analysis. Women classified as other were more likely to undergo active treatment in the logistic regression model.

CONCLUSION

SUI prevalence was highest in Hispanics, despite risk factors being more common in Black women. Black women were less likely to consult with a specialist. Mixed or unknown race/ethnicity women were more likely to undergo active treatment. Future studies will evaluate if racial/ethnic differences in SUI management are due to patient preference or provider practices.

Desire for Continued Pessary Use Among Women of Hispanic and Non-Hispanic Ethnic Backgrounds for Pelvic Floor Disorders

OBJECTIVE

This study aimed to describe the association between patient ethnicity/race and desire to continue using a pessary for the treatment of pelvic floor disorders.

METHODS

We performed a secondary analysis of a randomized trial among women presenting for pessary fitting. The primary outcome was the desire to continue using a pessary at 3 months. Bacterial vaginosis by Nugent score and vaginal symptoms (discharge, itching, pain, sores) were also evaluated. Logistic or multiple linear regression was performed with correction for body mass index, education level, parity, Charlson Comorbidity Index, and randomization to TrimoSan gel.

RESULTS

One hundred fourteen women (41 Hispanic and 73 non-Hispanic) were eligible for this analysis. Women self-identified as white (65/114; 57%), Hispanic (41/114, 36%), Asian (3/114; 2.6%), Native American (4/114; 3.5%), and "other" (1/114, 0.9%) race, with no self-identified African American women (0/114) meeting the inclusion criteria. No significant difference in desire to continue pessary use was found between Hispanic and non-Hispanic women (58.5% vs 63%; P = 0.69; corrected odds ratio [cOR], 1.11; 95% confidence interval [CI], 0.43-2.90) or across races (P = 0.89). Hispanic women had significantly higher risk of bacterial vaginosis (34% vs 16%; P = 0.04; cOR, 2.91; 95% CI, 1.01-8.39), higher Nugent scores (5.4 ± 2.3 vs 4.3 ± 2.3; P = 0.02; corrected coefficient, 1.10; 95% CI, 0.10-2.10), and more vaginal pain (17.1% vs 2.8%; P = 0.01; cOR, 9.14; 95% CI, 1.37-61.17) at 3 months.

CONCLUSIONS

Despite increased vaginal pain and vaginal microbiome disturbances in Hispanic women using a pessary, no significant differences in the desire to continue using the pessary existed.

Clinical epidemiological insights into urinary incontinence

INTRODUCTION AND HYPOTHESIS

Urinary incontinence (UI) is very common and heterogeneous among women with limited knowledge of progression or prognosis. Evidence based on clinical epidemiology can help to better understand the natural history of UI.

METHODS

We examine the challenges of UI definition and its subtypes, its impact on quality of life and health-seeking behavior. We review the proposed pathophysiology of UI subtypes and known risk factors as they relate to our current knowledge of the disease state. Finally, we emphasize the role of epidemiology in the process of acquiring new insight, improving knowledge, and translating this information into clinical practice.

RESULTS

Stress UI is most common overall, but mixed UI is most prevalent in older women. The three UI subtypes have some common risk factors, and others that are unique, but there remains a significant gap in our understanding of how they develop. Although the pathophysiology of stress UI is somewhat understood, urgency UI remains mostly idiopathic, whereas mixed UI is the least studied and most complex subtype. Moreover, there exists limited information on the progression of symptoms over time, and disproportionate UI health-seeking behavior. We identify areas of exploration (e.g., epigenetics, urinary microbiome), and offer new insights into a better understanding of the relationship among the UI subtypes and to develop an integrated construct of UI natural history.

CONCLUSION

Future epidemiological strategies using longitudinal study designs could play a pivotal role in better elucidating the controversies in UI natural history and the pathophysiology of its subtypes leading to improved clinical care.

Is pelvic organ support different between young nulliparous African and Caucasian women?

OBJECTIVE

There seems to be substantial variation in the prevalence of pelvic floor disorders between different ethnic groups. This may be due partially to differences in pelvic floor structure and functional anatomy. To date, data on this issue are sparse. The aim of this study was to compare hiatal dimensions, pelvic organ descent and levator biometry in young, healthy nulliparous Caucasian and African women.

METHODS

Healthy nulliparous non-pregnant volunteers attending a local nursing school in Uganda were invited to participate in this study during two fistula camps. All volunteers underwent a simple physician-administered questionnaire and a four-dimensional translabial ultrasound examination. Offline analysis was performed to assess hiatal dimensions, pelvic organ descent, levator muscle thickness and area. To compare findings with those obtained in nulliparous non-pregnant Caucasians, we retrieved the three-dimensional/four-dimensional ultrasound volume datasets of a previously published study.

RESULTS

The dataset of 76 Ugandan and 49 Caucasian women was analyzed. The two groups were not matched but they were comparable in age and body mass index. All measurements of hiatal dimensions and pelvic organ descent were significantly higher among the Ugandans (all P ≤ 0.01); however, muscle thickness and area were not significantly different between the two groups.

CONCLUSIONS

Substantial differences between Caucasian and Ugandan non-pregnant nulliparae were identified in this study comparing functional pelvic floor anatomy. It appears likely that these differences in functional anatomy are at least partly genetic in nature. Copyright © 2015 ISUOG. Published by John Wiley & Sons Ltd.

Clinical Guideline for Female Lower Urinary Tract Symptoms

The "Japanese Clinical Guideline for Female Lower Urinary Tract Symptoms," published in Japan in November 2013, contains two algorithms (a primary and a specialized treatment algorithm) that are novel worldwide as they cover female lower urinary tract symptoms other than urinary incontinence. For primary treatment, necessary types of evaluation include querying the patient regarding symptoms and medical history, examining physical findings, and performing urinalysis. The types of evaluations that should be performed for select cases include evaluation with symptom/quality of life (QOL) questionnaires, urination records, residual urine measurement, urine cytology, urine culture, serum creatinine measurement, and ultrasonography. If the main symptoms are voiding/post-voiding, specialized treatment should be considered because multiple conditions may be involved. When storage difficulties are the main symptoms, the patient should be assessed using the primary algorithm. When conditions such as overactive bladder or stress incontinence are diagnosed and treatment is administered, but sufficient improvement is not achieved, the specialized algorithm should be considered. In case of specialized treatment, physiological re-evaluation, urinary tract/pelvic imaging evaluation, and urodynamic testing are conducted for conditions such as refractory overactive bladder and stress incontinence. There are two causes of voiding/post-voiding symptoms: lower urinary tract obstruction and detrusor underactivity. Lower urinary tract obstruction caused by pelvic organ prolapse may be improved by surgery.

Urinary incontinence: prevalence, pattern, and opportunistic screening in Ile-Ife, Nigeria

INTRODUCTION AND HYPOTHESIS

Urinary incontinence is a source of health-related poor quality of life. It is, however, rarely disclosed, except when specifically enquired about by the healthcare provider. This study determined the prevalence of urinary incontinence and opportunistic screening for it in women attending a general outpatient clinic.

METHODS

A total of 1,250 consenting women attending a general outpatient clinic in Ile-Ife, a semi-urban town in Southwest Nigeria, were recruited into this cross-sectional study. Confidential post-consultation interviews were performed in each patient to determine whether they had been asked about urinary incontinence and whether they felt that they ought to have been asked. The Questionnaire for Urinary Incontinence Diagnosis (QUID) was administered to determine the prevalence and pattern of urinary incontinence. Results were expressed as proportions and compared using the Chi-squared test.

RESULTS

The subjects' ages ranged from 20 to 100 years (mean = 46.8 ± 17.7 years). Sixty-five women had urinary incontinence (prevalence = 5.2 %). QUID classified 30 (2.4 %), 23 (1.8 %), and 12 (1.0 %) of them as having urge, stress, and mixed incontinence respectively. None of them self-reported incontinence to their physicians. Only 9 incontinent (13.8 %) and 44 continent women (3.7 %) had opportunistic screening (p < 0.001). Fifty of the incontinent women (76.9 %) felt that their physician ought to have asked them about it. Forty-eight of them (73.8 %) did not consider incontinence a sufficient reason for presentation in hospital, but the majority (90.7 %) desired treatment.

CONCLUSION

Urinary incontinence was occasionally present, but usually undisclosed by women attending the general outpatient clinic, unless when specifically asked by their physicians. Opportunistic screening is therefore recommended in this setting.

Subtotal versus total abdominal hysterectomy: randomized clinical trial with 14-year questionnaire follow-up

OBJECTIVE

The objective of the study was to compare long-term results of subtotal vs total abdominal hysterectomy for benign uterine diseases 14 years after hysterectomy, with urinary incontinence as the primary outcome measure.

STUDY DESIGN

This was a long-term follow-up of a multicenter, randomized clinical trial without blinding. Eleven gynecological departments in Denmark contributed participants to the trial. Women referred for benign uterine diseases who did not have contraindications to subtotal abdominal hysterectomy were randomized to subtotal (n = 161) vs total (n = 158) abdominal hysterectomy. All women enrolled in the trial from 1996 to 2000 who were still alive and living in Denmark (n = 304) were invited to answer the validated questionnaire used in prior 1 and 5 year follow-ups. Hospital contacts possibly related to hysterectomy from 5 to 14 years postoperatively were registered from discharge summaries from all public hospitals in Denmark. The results were analyzed as intention to treat and per protocol. Possible bias caused by missing data was handled by multiple imputation. The primary outcome was urinary incontinence; the secondary outcomes were pelvic organ prolapse, constipation, pain, sexuality, quality of life (Short Form-36 questionnaire), hospital contacts, and vaginal bleeding.

RESULTS

The questionnaire was answered by 197 of 304 women (64.8%) (subtotal hysterectomy [n = 97] [63.4%]; total hysterectomy [n = 100] [66.2%]). Mean follow-up time was 14 years and mean age at follow-up was 60.1 years. After subtotal abdominal hysterectomy, 32 of 97 women (33%) complained of urinary incontinence compared with 20 of 100 women (20%) after total abdominal hysterectomy 14 years after hysterectomy (relative risk, 1.67; 95% confidence interval, 1.02-2.70; P = .035). After a multiple imputation analysis, this difference disappeared (relative risk, 1.36; 95% confidence interval, 0.86-2.13; P = .19). No differences were seen in any of the secondary outcomes.

CONCLUSION

Subtotal abdominal hysterectomy was not superior to total abdominal hysterectomy on any outcomes. More women seem to have subjective urinary incontinence 14 years after subtotal abdominal hysterectomy. This result was not confirmed by multiple imputation analysis and should be interpreted cautiously.

Effects of bilateral salpingo-oophorectomy at the time of hysterectomy on pelvic organ prolapse: results from the Women's Health Initiative trial

OBJECTIVE

This study aims to estimate the effects of bilateral salpingo-oophorectomy (BSO) at the time of hysterectomy and estrogen therapy on vaginal prolapse.

METHODS

A retrospective analysis of the Women's Health Initiative estrogen-alone trial was performed. Women who retained their ovaries were compared with women who had BSO at the time of hysterectomy for the presence of cystocele or rectocele at entry into the study. Based on BSO and hormone therapy (HT) status, participants were categorized into groups. We hypothesized that BSO and prolonged hypoestrogenemia may be associated with an increased risk of prolapse. Univariate and multivariate analyses were used to determine the effects of BSO and HT status on cystocele and rectocele.

RESULTS

Of 10,739 participants in the estrogen-alone trial, 8,879 women were included in the analysis. Older age, higher parity, higher body mass index, higher waist-to-hip ratio, and non-African-American race/ethnicity were associated with increased odds of developing cystocele or rectocele. Women who retained their ovaries had higher rates of cystocele or rectocele at screening (39%) compared with all women who had BSO (31-36%; odds ratio, 1.18; 95% CI, 1.04-1.33). After controlling for multiple variables, our analysis showed that women who retained their ovaries had higher odds of developing cystocele or rectocele compared with women who had BSO and no subsequent HT (odds ratio, 1.23; 95% CI, 1.07-1.41). All other comparisons were nonsignificant.

CONCLUSIONS

BSO at the time of hysterectomy is not associated with increased risk of cystocele or rectocele. BSO and no subsequent HT may even have a protective effect against cystocele or rectocele.

Socioeconomic status and race as predictors of treatment-seeking behavior for pelvic organ prolapse

OBJECTIVE

We sought to evaluate the prevalence of pelvic organ prolapse (POP) among a diverse group of women and to determine if race/ethnicity and/or socioeconomic status (SES) are factors in treatment-seeking behavior.

STUDY DESIGN

All data were collected from the National Institutes of Health-supported Boston Area Community Health Survey. SES was calculated by a 2-factor index that combined household income with years of education. Inferential statistics comprised 1-way analysis of variance, with a post hoc Scheffé test performed to evaluate whether there were differences between individual groups. A χ(2) test was used to evaluate whether distributions were equal among the various questions by race/ethnicity and SES category.

RESULTS

A total of 3205 women were included in the analysis. Hispanic ethnicity and younger age were associated with POP (P < .002 and P < .001, respectively) as well as with seeking treatment for prolapse (P = .007 and P < .001, respectively). These factors were also associated with subsequent surgical repair (P = .027 and P = .019, respectively). A regression model showed that women were 4.9% more likely to seek treatment for every year younger they were, across the range of age. Although women of a higher SES were more likely to have POP, SES was neither associated with a higher likelihood of seeking treatment nor with the surgical management of prolapse.

CONCLUSION

Hispanic ethnicity and younger age were associated with seeking treatment for POP. Hispanics were more likely than whites or blacks to proceed with surgical management. There was no correlation of SES with any of the above factors.

Risk factors for prolapse development in white, black, and Hispanic women

OBJECTIVES

: This study aimed to examine the risk factors for prevalence and incidence of pelvic organ prolapse (POP) in whites, Hispanics, and blacks.

METHODS

: This is a secondary analysis of the Women's Health Initiative (WHI) Estrogen plus Progestin Clinical Trial (E + P). Of the original E + P trial population of 16,608, 12,667 women (78.3%; 11,194 whites, 804 blacks, and 669 Hispanics) were included in the final study sample and evaluated during the 5-year period. The outcomes evaluated were any prolapse (WHI prolapse grades 1-3) and WHI prolapse grade 2 or 3. Descriptive analyses, logistic regression, and proportional hazard modeling were performed.

RESULTS

: Increasing parity correlates with increasing WHI prolapse grades (0-3) in whites and blacks but not Hispanics. The incidence of grade 2 or 3 POP increased by 250% in white women with 1 child (hazard ratio [HR], 2.50; 95% confidence interval [CI], 1.68-3.71) in comparison to nulliparous women and grew with higher parity. For blacks, a weak association between the parity and grade 2 or 3 POP was noted only in women who had 5 or more kids (HR, 10.41; 95% CI, 1.38-78.77). Blacks were less likely (HR, 0.53; 95% CI, 0.40-0.71) to develop grade 2 or 3 POP compared with whites. For grade 2 or 3 POP, age was found to be a risk factor in whites (odds ratio [OR], 1.03; 95% CI, 1.02-1.04) only and body mass index (≥25 kg/m, <30 kg/m) in whites (OR, 1.64; 95% CI, 1.34-2.02) and Hispanics (OR, 2.87; 95% CI, 1.03-2.02).

CONCLUSIONS

: White women are at a much greater risk for developing grade 2 or 3 POP compared with blacks. Parity correlates most strongly with the risk of prolapse development in whites and possibly in grand multiparous blacks.

Ethnicity and variations of pelvic organ prolapse bother

INTRODUCTION AND HYPOTHESIS

To determine if prolapse symptom severity and bother varies among non-Hispanic white, Hispanic, and Native American women with equivalent prolapse stages on physical examination.

METHODS

This was a retrospective chart review of new patients seen in an academic urogynecology clinic from January 2007 to September 2011. Data were extracted from a standardized intake form, including patients' self-identified ethnicity. All patients underwent a Pelvic Organ Prolapse Quantification (POPQ) examination and completed the Pelvic Floor Distress Inventory-20 (PFDI-20) with its Pelvic Organ Prolapse Distress Inventory (POPDI) subscale.

RESULTS

Five hundred and eighty-eight new patients were identified with pelvic organ prolapse. Groups did not differ by age, prior prolapse, and/or incontinence surgery, or sexual activity. Based on POPDI scores, Hispanic and Native American women reported more bother compared with non-Hispanic white women with stage 2 prolapse (p < 0.01). Level of bother between Hispanic and Native American women with stage 2 prolapse (p = 0.56) was not different. In subjects with ≥ stage 3 prolapse, POPDI scores did not differ by ethnicity (p = 0.24). In multivariate stepwise regression analysis controlling for significant factors, Hispanic and Native American ethnicity contributed to higher POPDI scores, as did depression.

CONCLUSIONS

Among women with stage 2 prolapse, both Hispanic and Native American women had a higher level of bother, as measured by the POPDI, compared with non-Hispanic white women. The level of symptom bother was not different between ethnicities in women with stage 3 prolapse or greater. Disease severity may overshadow ethnic differences at more advanced stages of prolapse.

Risk factors for fecal incontinence in older women

OBJECTIVES

The objectives of this study were to estimate the prevalence of fecal incontinence (FI) in older women and examine associations between potential risk factors and prevalent FI.

METHODS

We conducted a cross-sectional study of prevalent FI in 64,559 women, aged 62-87 years, in the Nurses' Health Study. Since 1976, participants provided information on health and lifestyle on mailed biennial questionnaires. Data on FI were collected in 2008. Adjusted odds ratios (ORs) and 95% confidence intervals (CIs) for FI were calculated using logistic regression models.

RESULTS

The reported prevalence of liquid or solid stool incontinence at least monthly increased from 9% in women aged 62 to 64 years to 17% in women aged 85 to 87 years. Prevalent FI was 50% less common in black women compared with white women (6% vs. 12%, respectively). Other variables associated with increased odds of FI at least monthly were pregnancy, higher body mass index (BMI), lower physical activity, functional limitations, current cigarette smoking, type 2 diabetes, high blood pressure, and neurologic disease. Urinary incontinence (UI) was a strong correlate of FI, with 63% of women with FI reporting UI at least monthly compared with 45% of women in the whole study population.

CONCLUSIONS

FI is a common condition among older women, and often co-occurs with UI. Potentially modifiable risk factors include BMI, physical activity, and cigarette smoking.

Knowledge and perceptions of pelvic floor disorders among african american and latina women

OBJECTIVE

: The objective of this study was to explore knowledge, barriers to seeking sociocultural perceptions of pelvic floor disorders (PFDs) among African American (AA) and Latina (LA) community-dwelling women.

METHODS

: Thirty-two women participated in 4 focus groups. The sample included AA and LA women aged 24 to 77 years. Focus groups were stratified by age and race/ethnicity. Discussion questions included knowledge of and related health needs and barriers to seeking care with respect to PFDs, urinary incontinence, and pelvic organ prolapse. Demographics and basic knowledge and experience with PFDs were also captured by survey.

RESULTS

: Several significant themes emerged from the data. AA and LA women had general misconceptions about PFDs and were unaware of PFDs causes, symptoms, and available treatments. Women were eager to receive more information, particularly prevention information that could be shared with their daughters. A major barrier to seeking care was the pattern of placing family demands before their own health needs.

CONCLUSIONS

: Findings suggest that there is a gap in information on PFDs among AA and LA women, yet a demand for information exists. Sociocultural perspectives discerned from focus group with AA and LA women can be used to tailor educational information and materials on PFDs. Findings may increase health provider awareness of the unique sociocultural barriers to seeking care for AA and LA women and improve patient education on PFDs.

A healthy bladder: a consensus statement

A panel of experts in urology, urogynecology, nursing, and behavioral therapy convened in 2010 to discuss the importance of a healthy bladder on overall health. They determined that a consensus statement was necessary to raise awareness among the general public, healthcare providers, payors, and policymakers, with the goals of minimizing the impact of poor bladder health and stimulating primary prevention of bladder conditions. In this statement, 'healthy' bladder function is described, as well as internal and external factors that influence bladder health. It is suggested that primary prevention strategies should be aimed at providing education regarding normal lower urinary tract structures and functioning to the public, including patients and healthcare providers. This education may promote the achievement of optimal bladder health by increasing healthy bladder habits and behaviors, awareness of risk factors, healthcare seeking, and clinician engagement and reducing stigma and other barriers to treatment. Promoting optimal bladder health may reduce the personal, societal and economic impact of bladder conditions, including anxiety and depression and costs associated with conditions or diseases and their treatment. While adopting healthy bladder habits and behaviors and behaviors may improve or maintain bladder health, it is important to recognize that certain symptoms may indicate the presence of conditions that require medical attention; many bladder conditions are treatable with a range of options for most bladder conditions. Lastly, the authors propose clinical directives based on persuasive and convergent research to improve and maintain bladder health. The authors hope that this statement will lead to promotion and achievement of optimal bladder health, which may improve overall health and help minimize the effects of bladder conditions on the public, healthcare professionals, educators, employers, and payors. The advisors are in consensus regarding the recommendations for improving and maintaining bladder health presented herein.

Pelvic organ prolapse and stress urinary incontinence: A review of etiological factors

Although they may present with significant morbidity, pelvic organ prolapse and stress urinary incontinence are mainly afflictions that affect quality of life. To appropriately treat these entities, comprehension of the various theories of the pathophysiology is paramount. Utilizing a Medline search, this article reviews recent data concerning intrinsic (i.e., genetics, postmenopausal status) and extrinsic factors (i.e., previous hysterectomy, childbirth) leading to organ prolapse or stress incontinence.

Original research: rates of remission, improvement, and progression of urinary incontinence in Asian, Black, and White women

BACKGROUND

Evidence suggests that race affects the prevalence and incidence of urinary incontinence (UI) in women. But little is known about racial differences in the rates of remission, improvement, and progression of UI in women.

OBJECTIVE

We sought to compare changes in UI frequency over two years among Asian, black, and white women with UI.

METHODS

Participants in the Nurses' Health Study and the Nurses' Health Study II responded to mailed questionnaires (in 2000 and 2002, and 2001 and 2003, respectively), giving information on race and the frequency of UI. Prospective analyses were conducted over two years from data gathered on 57,900 women, ages 37 to 79, who had at least monthly UI at baseline.

RESULTS

Over the two two-year study periods, black women were significantly more likely than white women to report remission of UI (14% versus 9%, respectively), and Asian women were significantly more likely than white women to report less frequent UI (40% versus 31%, respectively). Improvement was more common in older black women than in older white women, but rates of improvement were comparable between younger black and younger white women. Black women were less likely than white women to report more frequent UI at follow-up (30% versus 34%, respectively), and, after adjusting for health and lifestyle factors, the difference was borderline statistically significant.

CONCLUSIONS

Changes in the frequency of UI appear to vary by race, even after adjustment for risk factors. These findings may account for some of the previously observed differences in UI prevalence across racial groups. Although UI is a common condition in women of all races, nurses and other clinicians should be aware that its presentation may vary according to race. Such an understanding could increase clinicians' confidence in discussing UI with patients, reducing the possibility that the condition goes unrecognized.

KEYWORDS

epidemiology, progression, race, remission, urinary incontinence.

Genetic influences are important for most but not all lower urinary tract symptoms: a population-based survey in a cohort of adult Swedish twins

BACKGROUND

The relative importance of genetic and environmental factors for the occurrence of lower urinary tract symptoms (LUTS) is poorly understood.

OBJECTIVE

To (1) estimate the prevalence of urinary incontinence (UI), overactive bladder (OAB), and other LUTS and (2) to assess the heritability of these symptoms.

DESIGN, SETTING, AND PARTICIPANTS

Cross-sectional survey of LUTS in a national population-based cohort of Swedish twins 20-46 yr of age (n=42 582) from the Swedish Twin Registry.

MEASUREMENTS

Prevalence rates were determined and heritability of LUTS (in female twins) was assessed using indicators of twin similarity.

RESULTS AND LIMITATIONS

A total of 25 364 twins completed the questionnaire (response rate: 59.6%). LUTS were more common in women (UI: 7%; OAB: 9%; nocturia: 61%; micturition frequency: 18%) than in men (UI: 1%; OAB: 5%; nocturia: 40%; micturition frequency: 11%), and prevalence increased with age. The strongest genetic effects were observed for UI, frequency, and nocturia. The lowest estimate for genetic effects was observed for OAB where environmental effects dominated, and more specifically shared family environment accounted for a third or more of the total variation. For stress UI, a fifth of the total variation in susceptibility to the disorder could be attributed to shared environment. Nonshared environmental effects were seen in the range of 45-65% for the various LUTS. The prevalence of LUTS was low in the men, and there were too few male cases to compute measures of similarity or heritability estimates.

CONCLUSIONS

This study provides robust evidence of a genetic influence for susceptibility to UI, frequency, and nocturia in women. In contrast, shared environmental factors seem more important for the predisposition to develop OAB, which may reflect familial patterns such as learning from parental behaviours.

The incidence of urinary incontinence across Asian, black, and white women in the United States

OBJECTIVE

We calculated incidence rates of urinary incontinence by incontinence frequency and type over 4 years in Asian, black, and white women in the United States.

STUDY DESIGN

Prospective analyses included 76,724 participants aged 37-79 years in the Nurses' Health Study cohorts with no incontinence at baseline.

RESULTS

The 4-year incidence of incontinence at least monthly was higher in white women (7.3/100 person-years) compared with Asian (5.7/100 person-years; P = .003) and black women (4.8/100 person-years; P < .001). The incidence of at least weekly stress incontinence was significantly lower in black compared with white women (0.1 vs 0.8 per 100 person-years; P < .001). The difference between black and white women in the incidence of any incontinence and stress incontinence remained significant after adjusting for known risk factors (P < .001 for both).

CONCLUSION

Urinary incontinence incidence differs by race. Studies to confirm these results and better understand underlying mechanisms are needed.

Racial differences in pelvic organ prolapse

OBJECTIVE

To compare the estimated prevalence of, risk factors for, and level of bother associated with subjectively reported and objectively measured pelvic organ prolapse in a racially diverse cohort.

METHODS

The Reproductive Risks for Incontinence Study at Kaiser 2 is a population-based cohort study of 2,270 middle-aged and older women. Symptomatic prolapse was self-reported, and bother was assessed on a five-point scale. In 1,137 women, prolapse was measured with the Pelvic Organ Prolapse Quantification (POP-Q) system. Multivariable logistic regression analysis was used to identify the independent association of prolapse and race while controlling for risk factors.

RESULTS

The participants' mean (standard deviation) age was 55 (9) years, and 44% were white, 20% were African American, 18% were Asian American, and 18% were Latina or other race. Seventy-four women (3%) reported symptomatic prolapse. In multivariable analysis, the risk of symptomatic prolapse was higher in white (prevalence ratio 5.35, 95% confidence interval [CI] 1.89-15.12) and Latina (prevalence ratio 4.89, 95% CI 1.64-14.58) compared with African-American women. Race was not associated with report of moderate to severe bother. Degree of prolapse by POP-Q stage was similar across all racial groups; however, the risk of the leading edge of prolapse at or beyond the hymen was higher in white (prevalence ratio 1.40, 95% CI 1.02-1.92) compared with African-American women.

CONCLUSION

Compared with African-American women, Latina and white women had four to five times higher risk of symptomatic prolapse, and white women had 1.4-fold higher risk of objective prolapse with leading edge of prolapse at or beyond the hymen.

LEVEL OF EVIDENCE

II.

Is lysyl oxidase-like protein-1, alpha-1 antitrypsin, and neutrophil elastase site specific in pelvic organ prolapse?

INTRODUCTION AND HYPOTHESIS

We investigated whether the expression of alpha-1 antitrypsin (ATT), neutrophil elastase (NE), and lysyl oxidase-like protein 1 (LOXL-1) vary within the vagina in subjects with pelvic organ prolapse (POP).

METHODS

Biopsies were obtained from the anterior and posterior vaginal wall of 22 women with POP (> or =stage 2 by POP-Q). The subjects were grouped by the most prominent defect: cystocele, cystocele plus uterine prolapse, and rectocele. Comparative real-time PCR, Western blotting, and NE enzyme activity assay were performed.

RESULTS

The ratio of anterior and posterior vaginal wall ATT, NE, and LOXL-1 expression varied between individuals within the same defect group.

CONCLUSIONS

ATT, NE, and LOXl-1 expression was variable among different biopsy sites in the vagina. No consistent pattern was present when the subjects were grouped by the most prominent defect. We recommend careful consideration of biopsy sites in future studies on POP to enhance reproducibility of data.

Lower urinary tract symptoms in women

PURPOSE OF REVIEW

To summarize recent population-based literature on the prevalence and consequences of urinary incontinence and overactive bladder (OAB) symptoms in women and describe our present knowledge regarding known risk factors.

RECENT FINDINGS

The prevalence of urinary incontinence in women ranged from 5 to 69%, with most studies reporting a prevalence of any urinary incontinence in the range of 25-45%. In a longitudinal population study in which women were followed for 16 years, the overall prevalence of urinary incontinence increased from 15 to 28%, and the incidence rate of urinary incontinence was 21%, whereas the corresponding remission rate was 34%. Increasing evidence is now available regarding a genetic component in the cause of stress urinary incontinence. The reported prevalence of OAB in women varied between 7.7 and 31.3%, and in general, prevalence rates increased with age. In a longitudinal study, the prevalence of OAB, nocturia and daytime micturition frequency of eight or more times per day increased by 9, 20 and 3%, respectively, in a cohort of women followed from 1991 to 2007. The incidence of OAB was 20%, and the corresponding remission rate was 43%.

SUMMARY

Urinary incontinence and OAB are highly prevalent conditions. The cost of illness for urinary incontinence and OAB is a substantial economic and human burden and is likely to increase further in the future, highlighting the need for effective forms of management.

Investigating the associations between nocturia and sleep disorders in perimenopausal women

PURPOSE

We determined the associations between nocturia and sleep disorders in perimenopausal women.

MATERIALS AND METHODS

A total of 100 women with nocturia were compared to 200 without nocturia. Obstructive sleep apnea, insomnia, anxiety and menopausal stage were assessed using validated questionnaires. Comorbidities associated with nocturia were determined by bivariate analysis and multivariate logistic regression.

RESULTS

Independent associations for nocturia were anxiety (OR 2.11, 95% CI 1.08-4.13), black American race (OR 2.00, 95% CI 1.06-3.85), obstructive sleep apnea symptoms (OR 1.73, 95% CI 1.18-2.53) and insomnia (OR 1.11, 95% CI 1.05-1.12).

CONCLUSIONS

Nocturia is associated with sleep disorders in perimenopausal women.

Prevalence of symptomatic pelvic floor disorders in US women

CONTEXT

Pelvic floor disorders (urinary incontinence, fecal incontinence, and pelvic organ prolapse) affect many women. No national prevalence estimates derived from the same population-based sample exists for multiple pelvic floor disorders in women in the United States.

OBJECTIVE

To provide national prevalence estimates of symptomatic pelvic floor disorders in US women.

DESIGN, SETTING, AND PARTICIPANTS

A cross-sectional analysis of 1961 nonpregnant women (>or=20 years) who participated in the 2005-2006 National Health and Nutrition Examination Survey, a nationally representative survey of the US noninstitutionalized population. Women were interviewed in their homes and then underwent standardized physical examinations in a mobile examination center. Urinary incontinence (score of >or=3 on a validated incontinence severity index, constituting moderate to severe leakage), fecal incontinence (at least monthly leakage of solid, liquid, or mucous stool), and pelvic organ prolapse (seeing/feeling a bulge in or outside the vagina) symptoms were assessed.

MAIN OUTCOME MEASURES

Weighted prevalence estimates of urinary incontinence, fecal incontinence, and pelvic organ prolapse symptoms.

RESULTS

The weighted prevalence of at least 1 pelvic floor disorder was 23.7% (95% confidence interval [CI], 21.2%-26.2%), with 15.7% of women (95% CI, 13.2%-18.2%) experiencing urinary incontinence, 9.0% of women (95% CI, 7.3%-10.7%) experiencing fecal incontinence, and 2.9% of women (95% CI, 2.1%-3.7%) experiencing pelvic organ prolapse. The proportion of women reporting at least 1 disorder increased incrementally with age, ranging from 9.7% (95% CI, 7.8%-11.7%) in women between ages 20 and 39 years to 49.7% (95% CI, 40.3%-59.1%) in those aged 80 years or older (P < .001), and parity (12.8% [95% CI, 9.0%-16.6%], 18.4% [95% CI, 12.9%-23.9%], 24.6% [95% CI, 19.5%-29.8%], and 32.4% [95% CI, 27.8%-37.1%] for 0, 1, 2, and 3 or more deliveries, respectively; P < .001). Overweight and obese women were more likely to report at least 1 pelvic floor disorder than normal weight women (26.3% [95% CI, 21.7%-30.9%], 30.4% [95% CI, 25.8%-35.0%], and 15.1% [95% CI, 11.6%-18.7%], respectively; P < .001). We detected no differences in prevalence by racial/ethnic group.

CONCLUSION

Pelvic floor disorders affect a substantial proportion of women and increase with age.

Prevalence of probable overactive bladder in a private obstetrics and gynecology group practice

OBJECTIVE

To examine the prevalence of probable overactive bladder (OAB) in black, Hispanic, and white women.

RESEARCH DESIGN AND METHODS

This was a cross-sectional survey of women (aged > or = 18 years) presenting to a private obstetrics and gynecology group practice. The survey consisted of the Overactive Bladder-Validated 8 (OAB-V8) and other questions related to ethnicity, health history, desire for treatment, and reason for visit.

MAIN OUTCOME MEASURE

The OAB-V8 is a validated, eight-item, self-administered questionnaire that assesses the degree of bother associated with OAB symptoms. Subjects scoring > or = 8 on the OAB-V8 were considered to have probable OAB.

RESULTS

A total of 947 women completed the OAB-V8: 82% were black, 10% were white, and 4% were Hispanic. The prevalence of probable OAB was similar among different races/ethnicities, with 35% of black, 36% of Hispanic, and 30% of white women scoring > or = 8 on the OAB-V8. Micturition frequency, nocturia, and waking up at night were the most bothersome symptoms. History of constipation, history of urinary tract infection, and number of pregnancies were independent risk factors for probable OAB. Thirty-five percent of patients with probable OAB and 5% of those without OAB desired information about OAB treatment options; however, only 5% of patients reported visiting their doctor for reasons related to their bladder symptoms.

CONCLUSIONS

OAB is prevalent among black, white, and Hispanic women. Using a simple OAB awareness tool, such as the OAB-V8, can help clinicians identify patients with bothersome OAB symptoms who could benefit from treatment. The survey results may have been limited by incorrect self-reported responses, the demographics of the population, and incomplete surveys.