A multicenter prospective study for overactive bladder patient treatment satisfaction with mirabegron after being unsatisfied with antimuscarinic therapy (FAVOR study)

AIM: We investigated the satisfaction and efficacy of mirabegron in patients with overactive bladder (OAB) symptoms who were unsatisfied with previous antimuscarinic treatment. METHODS: This was a 12-week, open-label study of adults with OAB who had been treated with antimuscarinics within 2 years of screening and expressed dissatisfaction over poor efficacy or adverse events of antimuscarinics. All enrolled patients have received mirabegron 50 mg once daily for 12 weeks. The primary outcome was the percentage of patients reporting treatment satisfaction questions (TSQ) at week 12 ("very satisfied" or "somewhat satisfied"). Patients completed voiding diaries, Overactive Bladder Questionnaire short form (OAB-q-SF), Overactive Bladder Symptom Score (OABSS), and the global response assessment (GRA) at baseline, Week 4, and Week 12. At 12-weeks, patients were assessed for willingness to continue treatment. RESULTS: The response rate of treatment satisfaction at 12 weeks was 69.3% (275/397) (95% confidence interval 64.7-73.8). Significant improvements from baseline to weeks 4 and 12 were observed in the frequency, urgency due to urinary incontinence, and urgency episodes per 24 h (all p < .0001). Both OAB-q-SF and OABSS were significantly improved compared to baseline. At 4 and 12 weeks, 27.5% and 41.8% of patients, respectively, responded to the GRA as being moderately or markedly improved. At 12 weeks, 80.8% of patients were willing to continue mirabegron. CONCLUSIONS: Mirabegron improved the rates of treatment satisfaction and symptoms in patients with OAB who were unsatisfied with prior antimuscarinic treatment.