To better understand the etiology and treated natural history of UCPPS, and to identify clinical factors and research measurements to define clinically relevant sub-groups of these patients for future clinical trials, and to inform symptom management, the NIDDK established the Multidisciplinary Approach to the Study of Chronic Pelvic Pain (MAPP) Research Network in 20089 (http://www.mappnetwork.org/). The primary clinical research effort carried out by this network in Phase I was a prospective cohort study, the Trans-MAPP Epidemiology/Phenotyping (EP) Study.10 From 12/14/2009 through 12/14/2012 1,039 men and women were enrolled, including persons with UCPPS (n=424); persons with other co-morbid illnesses, including fibromyalgia, irritable bowel syndrome, and chronic fatigue syndrome (n=200 for all conditions); and healthy controls (n=415). Study participants were extensively characterized (i.e., phenotyped) at baseline, and UCPPS participants were followed for 12 months. During follow-up, using a web-based symptom data capture system, a small battery of self-report questionnaires were repeated on a bi-weekly schedule for 48 weeks. In addition, neuroimaging was performed in a subset of participants (n=279) at baseline, and biological samples were collected on all participants at baseline and follow-up for studies to identify plasma and urine biomarkers and potential infectious agents. This study was complemented by a number of Discovery Site-Specific clinical research studies (i.e., studies generally conducted at a single site) and investigations of animal models developed by multiple sites to mimic symptoms of human UCPPS.~Initial analyses of these data have identified a number of provocative findings. There are strong indications those certain subgroups of participants (albeit with small sample sizes) with urinary and non-urinary symptoms tend to improve over time; whereas other subgroups tend to worsen over time. These patterns of improving or worsening are differentially expressed according to sex, subtype of bladder pain syndrome (BPS), and pain location (localized to the pelvic region vs pain reported in the pelvic region and beyond).~The second phase of the MAPP Network is designed to conduct a prospective, observational study of men and women with UCPPS, referred to as the Symptom Patterns Study (SPS). This follow-up study will have pre-defined subgroups, with longer follow-up, in order to further investigate clinical and biologic factors associated with worsening and/or improvement of reported urinary and non-urinary symptoms.~This proposed MAPP Phase II SPS also presents the opportunity to apply many of the most promising research methods in the pain field (e.g. functional, chemical and structural neuroimaging, quantitative sensory testing) during the course of the study (at baseline and then longitudinally) to better characterize men and women with UCPPS. Most of these measures were only collected at a single point in time in the Trans-MAPP Epidemiology/Phenotyping Study of Phase I, and within a sample of UCPPS patients not enriched with predefined subgroups. Further phenotyping in the second phase study will allow us to better determine which of these measures, or any other measures identified during Phase I (e.g., urinary or serum biomarkers), might identify individuals most likely to have spontaneous improvement of their symptoms, versus transition to a more peripheral (pelvic pain only) or centralized form (pelvic pain and beyond) of urinary and non-urinary pain.~Eligible participants will be asked to participate in the study for up to 36 months. During which they will be asked to complete a series of in-clinic study visits that will at various time points a neuroimaging scan and quantitative sensory tests, online internet-based questionnaires in clinic and off site/at home (assessing symptoms, health care utilization, flare status, and quality of life), a physical exam, a pelvic exam, and prostate massage (optional for males only).
This study is the second phase of the MAPP Network and is designed to conduct a prospective, observational study of men and women with UCPPS, referred to as the Symptom Patterns Study (SPS), enriched with pre-defined subgroups, with longer follow-up, in order to further investigate clinical and biologic factors associated with worsening and/or improvement of reported urinary and non-urinary symptoms.