Title: A Randomized Clinical Trial Comparing Percutaneous Tibial Nerve Stimulation in Combination With Mirabegron to Percutaneous Tibial Nerve Stimulation Plus Placebo in Women With Refractory OAB Symptoms

Detailed Summary

Abstract Introduction: Urgency Urinary Incontinence (UUI) is a common condition with a prevalence of 9-31% in women in the United States. Despite current treatments, a high number of women have symptoms refractory to first- and second-line treatment approaches. Aims: The primary aim of this randomized controlled trial is to compare the efficacy of percutaneous tibial nerve stimulation (PTNS) and mirabegron treatment versus PTNS with placebo on change in the number of UUI episodes over a 12-week treatment course. Secondary aims include comparing the efficacy of combined treatment of PTNS and mirabegron versus PTNS with placebo on improvement in urinary incontinence symptom specific distress and quality of life related to UUI over a 12-week course of PTNS. Methods: A total of 54 consented participants will be recruited and randomized with 27 patients in the PTNS with mirabegron (daily 50 mg dose for the 12-week course) group and 27 patients in the PTNS with placebo group. Demographics and baseline data will be analyzed by student's t-test and chi-squared test or Fischer's Exact test as appropriate. Hypothesis: We anticipate that combination therapy will prove superior to monotherapy for reducing the number of UUI episodes over a 12-week treatment course.

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