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Changes in overactive bladder symptoms from baseline to 4 and 12 weeks. ICSI, Interstitial Cystitis Symptom Index; ICPI, Interstitial Cystitis Problem Index; OABSS, Overactive Bladder Symptom Score; VAS, visual analog scale. a-c)P<0.05 (a)baseline vs. 4 weeks; b)baseline vs. 12 weeks; c)4 weeks vs. 12 weeks) by Wilcoxon signed rank test.
