• Siobhan Sutcliffe, Graham A Colditz, Ratna Pakpahan, Catherine S Bradley, Melody S Goodman, Gerald L Andriole, and H Henry Lai.
• Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri; Alvin J. Siteman Cancer Center, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri.
• Neurourol. Urodyn. 2015 Feb 1;34(2):188-95.

AimsTo provide the first description and quantification of symptom changes during interstitial cystitis/bladder pain syndrome and chronic prostatitis/chronic pelvic pain syndrome symptom exacerbations ("flares").MethodsParticipants at one site of the Trans-Multidisciplinary Approaches to the study of chronic Pelvic Pain Epidemiology and Phenotyping Study completed two 10-day diaries over the 1-year study follow-up period, one at baseline and one during their first flare (if not at baseline). On each day of the diary, participants reported whether they were currently experiencing a flare, defined as "symptoms that are much worse than usual" for at least 1 day, and their levels of urination-related pain, pelvic pain, urgency, and frequency on a scale of 0-10. Linear mixed models were used to calculate mean changes in symptoms between non-flare and flare days from the same participant.ResultsEighteen of 27 women and 9 of 29 men reported at least one flare during follow-up, for a total of 281 non-flare and 210 flare days. Of these participants, 44.4% reported one flare, 29.6% reported two flares, and 25.9% reported ≥ 3 flares over the combined 20-day diary observation period, with reported flares ranging in duration from 1 day to >2 weeks. During these flares, each of the main symptoms worsened significantly by a mean of at least two points and total symptoms worsened by a mean of 11 points for both sexes (all P ≤ 0.01).ConclusionsFlares are common and correspond to a global worsening of urologic and pelvic pain symptoms.© 2013 Wiley Periodicals, Inc.

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