RESULTS	At 4 weeks mean improvements in OAB symptoms , including urgency , frequency ( primary variable ) , incontinence and nocturia , were larger in patients randomised to solifenacin 5 mg ; with the difference for incontinence being statistically significant ( mean reduction in incontinence episodes/24 hrs in the solifenacin group of -1.30 vs. -0.90 ( p = 0.0181 ) ; the mean result for solifenacin 5 mg amounted to a 44 % additional improvement . )\