Inclusion Criteria:  consenting adult patients who had an OAB diagnosis by their healthcare practitioner and were about to start mirabegron treatment as part of routine clinical practice were eligible for enrollment.  Exclusion Criteria:  mixed incontinence where stress incontinence was the predominant symptom (as determined by the investigator) severe uncontrolled hypertension (i.e. systolic blood pressure ≥180 mm Hg and/or diastolic blood pressure ≥110 mm Hg) anxiety and/or depression pregnancy women who reported having either a current or previous (within one month) urinary tract infection