Aim

To report research terminology and definitions for describing healthy bladder function among women and girls.

Methods

The Prevention of Lower Urinary tract Symptoms (PLUS) Consortium developed research terminology and definitions for elements of healthy bladder function based on existing understanding of storage and emptying functions of the bladder and accepted definitions of lower urinary tract symptoms (LUTS). The novel concept of a bladder "bioregulatory" function was also proposed. Elements of bladder function corresponding to bladder health (BH) and LUTS were developed and refined using an iterative process. A comprehensive reference table structured by bladder function (Storage, Emptying, and Bioregulatory) and elements of each function was created to document proposed research terminology and definitions.

Results

The BH research definitions for each bladder function are: (1) Storage: the ability to hold urine for a reasonable duration of time and sense bladder fullness without fear of or concern about urgency, discomfort or leakage; (2) Emptying: the ability to empty the bladder completely in a timely, efficient, effortless, comfortable manner; and (3) Bioregulatory: the bladder barrier protects the individual/host from pathogens, chemicals, and malignancy. Research definitions for seven Storage, seven Emptying, and three Bioregulatory elements of function are presented. Novel LUTS research definitions were developed when gaps in existing definitions were identified or nonclinical language was desired.

Conclusions

PLUS BH definitions reflect a transdisciplinary approach to standardizing research definitions for elements of bladder function from a perspective of health rather than dysfunction and provide a framework for studying BH in clinical practice, public health promotion, and LUTS prevention.

Lower urinary tract symptoms (LUTS) are highly prevalent in women, and are expected to impose a growing burden to individuals and society as the population ages. The predominance of research related to LUTS has focused on underlying pathology, disease mechanisms, or the efficacy of treatments for women with LUTS. Although this research has been vital for helping to reduce or ameliorate LUTS conditions, it has done little to prevent the onset of LUTS. Health promotion and prevention require an expansion of scientific inquiry beyond the traditional paradigm of studying disease mechanisms and treatment to the creation of an evidence base to support recommendations for bladder health promotion and, in turn, prevention of LUTS. The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) introduced the concept of prevention as an important priority for women's urologic research as a prelude to supporting the formation of the Prevention of Lower Urinary Tract Symptoms (PLUS) research consortium. In this article, we introduce the PLUS research consortium to the scientific community; share the innovative paradigms by which the consortium operates; and describe its unique research mission: to identify factors that promote bladder health across the life course and prevent the onset of LUTS in girls and women.

BACKGROUND:Bladder health in women and girls is poorly understood, in part, due to absence of a definition for clinical or research purposes. This article describes the process used by a National Institutes of Health funded transdisciplinary research team (The Prevention of Lower Urinary Tract Symptoms [PLUS] Consortium) to develop a definition of bladder health. METHODS:The PLUS Consortium identified currently accepted lower urinary tract symptoms (LUTS) and outlined elements of storage and emptying functions of the bladder. Consistent with the World Health Organization's definition of health, PLUS concluded that absence of LUTS was insufficient and emphasizes the bladder's ability to adapt to short-term physical, psychosocial, and environmental challenges for the final definition. Definitions for subjective experiences and objective measures of bladder dysfunction and health were drafted. An additional bioregulatory function to protect against infection, neoplasia, chemical, or biologic threats was proposed. RESULTS:PLUS proposes that bladder health be defined as: "A complete state of physical, mental, and social well-being related to bladder function and not merely the absence of LUTS. Healthy bladder function permits daily activities, adapts to short-term physical or environmental stressors, and allows optimal well-being (e.g., travel, exercise, social, occupational, or other activities)." Definitions for each element of bladder function are reported with suggested subjective and objective measures. CONCLUSIONS:PLUS used a comprehensive transdisciplinary process to develop a bladder health definition. This will inform instrument development for evaluation of bladder health promotion and prevention of LUTS in research and public health initiatives.

Aims

The Prevention of Lower Urinary Tract Symptoms (PLUS) Research Consortium was established by the National Institutes of Health in 2015 to expand research beyond the detection and treatment of lower urinary tract symptoms (LUTS) to the promotion and preservation of bladder health and prevention of LUTS in girls and women. While many multi-disciplinary scientific networks focus on pelvic floor dysfunction and LUTS, the PLUS Consortium stands alone in its focus on prevention. This article describes the PLUS approach to developing a conceptual framework to guide the Consortium's initial prevention research agenda.

Methods

The conceptual framework was informed by traditional social ecological models of public health, biopsychosocial models of health, Glass and McAtee's Society-Behavior-Biology Nexus, and the World Health Organization's conceptual framework for action on the social determinants of health.

Results

The PLUS conceptual framework provides a foundation for developing prevention interventions that have the greatest likelihood of promoting and preserving bladder health among diverse populations.

Conclusions

PLUS Consortium work is premised on the notion that programs, practices, and policies designed to promote health will have optimal impact if the conceptual foundation upon which efforts are based is comprehensive and informed by multiple disciplines. The PLUS conceptual framework is broadly applicable to domains of health that have historically focused on the treatment of illness and symptoms rather than the promotion of health. It is also applicable to domains of health that have been examined from a predominantly biological or social ecological perspective, without integration of both perspectives.

Purpose

We used MAPP data to identify participants with urological chronic pelvic pain syndromes only or a chronic functional nonurological associated somatic syndrome in addition to urological chronic pelvic pain syndromes. We characterized these 2 subgroups and explored them using 3 criteria, including 1) MAPP eligibility criteria, 2) self-reported medical history or 3) RICE criteria.

Materials and methods

Self-reported cross-sectional data were collected on men and women with urological chronic pelvic pain syndromes, including predominant symptoms, symptom duration and severity, nonurological associated somatic syndrome symptoms and psychosocial factors.

Results

Of 424 participants with urological chronic pelvic pain syndromes 162 (38%) had a nonurological associated somatic syndrome, including irritable bowel syndrome in 93 (22%), fibromyalgia in 15 (4%), chronic fatigue syndrome in 13 (3%) and multiple syndromes in 41 (10%). Of 233 females 103 (44%) had a nonurological associated somatic syndrome compared to 59 of 191 males (31%) (p = 0.006). Participants with a nonurological associated somatic syndrome had more severe urological symptoms and more frequent depression and anxiety. Of 424 participants 228 (54%) met RICE criteria. Of 228 RICE positive participants 108 (47%) had a nonurological associated somatic syndrome compared to 54 of 203 RICE negative patients (28%) with a nonurological associated somatic syndrome (p < 0.001).

Conclusions

Nonurological associated somatic syndromes represent important clinical characteristics of urological chronic pelvic pain syndromes. Participants with a nonurological associated somatic syndrome have more severe symptoms, longer duration and higher rates of depression and anxiety. RICE positive patients are more likely to have a nonurological associated somatic syndrome and more severe symptoms. Because nonurological associated somatic syndromes are more common in women, future studies must account for this potential confounding factor in urological chronic pelvic pain syndromes.

Purpose

We examined symptom variability in men and women with urological chronic pelvic pain syndrome. We describe symptom fluctuations as related to early symptom regression and its effect on estimated 1-year symptom change. We also describe a method to quantify patient specific symptom variability.

Materials and methods

Symptoms were assessed biweekly in 424 subjects with urological chronic pelvic pain syndrome during 1 year. To evaluate the impact of early symptom regression subjects were classified as improved, no change or worse according to the rate of change using 1) all data, 2) excluding week 0 and 3) excluding weeks 0 and 2. Patient specific, time varying variability was calculated at each interval using a sliding window approach. Patients were classified as high, medium or low variability at each time and ultimately as high or low variability overall based on the variability for the majority of contacts.

Results

Prior to excluding early weeks to adjust for early symptom regression 25% to 38% and 5% to 6% of patients were classified as improved and worse, respectively. After adjustment the percent of patients who were improved or worse ranged from 15% to 25% and 6% to 9%, respectively. High and low variability phenotypes were each identified in 25% to 30% of participants.

Conclusions

Patients with urological chronic pelvic pain syndrome show symptom variability. At study enrollment patients had worse symptoms on average, resulting in a regression effect that influenced the estimated proportion of those who were improved or worse. Prospective studies should include a run-in period to account for regression to the mean and other causes of early symptom regression. Further, symptom variability may be quantified and used to characterize longitudinal symptom profiles of urological chronic pelvic pain syndrome.