Table 1. Characteristics of interstitial cystitis/bladder pain syndrome (IC/BPS) and chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS) participants, Washington University School of Medicine and the University of Alabama at Birmingham, 2010-2013.

	All (n=76)	Female (n=46)	Male (n=30)	p-value1
Baseline age (years, mean (range))	47.7 (18.9 -80.0)	46.6 (18.9 - 75.8)	49.4 (26.6 - 80.0)	0.45
Caucasian (%)	88.2	89.1	86.7	0.73
Met IC/BPS criteria at baseline (%)2	94.7	100.0	86.7	0.02
Duration of symptoms at baseline (years, mean (range))	13.3 (0.2 - 54.2)	16.4 (0.2 - 52.0)	8.6 (0.9 - 54.2)	0.01
Non-flare symptom levels (mean (range)):
Pelvic pain, pressure, or discomfort in the past two weeks (on a scale of 0-10)	4.2 (0.0 - 10.0)	4.9 (0.0 - 10.0)	3.2 (0.0 - 9.0)	0.007
Urgency in the past two weeks (on a scale of 0-10)	3.9 (0.0 - 10.0)	4.8 (0.0 - 10.0)	2.6 (0.0 - 8.0)	0.001
Frequency in the past two weeks (on a scale of 0-10)	4.0 (0.0 - 10.0)	4.9 (0.0 - 10.0)	2.7 (0.0 - 9.0)	0.002
Genitourinary pain index (on a scale of 0-23)	10.5 (0.0 - 22.0)	11.6 (0.0 - 22.0)	9.0 (0.0 - 20.0)	0.06
Interstitial cystitis symptom index (on a scale of 0-20)	8.7 (0.0 - 18.0)	10.4 (3.0 - 18.0)	6.4 (0.0 - 16.0)	0.0002
Interstitial cystitis problem index (on a scale of 0-16)	7.0 (0.0 - 16.0)	8.8 (1.0 - 16.0)	4.8 (0.0 - 14.0)	0.0002
Flare at baseline (%)	33.0	35.6	30.0	0.62
Presence of non-urological associated syndromes (%):3
Irritable bowel syndrome	26.8	28.6	24.1	0.68
Fibromyalgia	9.9	14.3	3.5	0.23
Chronic fatigue syndrome	12.7	19.1	3.5	0.07
Any associated syndrome	38.0	45.2	27.6	0.13

¹P-values were calculated by Student's t-tests or chi-squared tests, as appropriate.

²Defined as an unpleasant sensation of pain, pressure, or discomfort perceived to be related to the bladder/prostate and/or pelvic region, associated with lower urinary tract symptoms, for the majority of time in the three months before baseline.

³Assessed by the Complex Medical Symptoms Inventory[15]