The incidence rates of urinary incontinence in the PKERP and PKRP groups were 35.56 % and 18.89 % ( P < 0.01 ) at 24 hours after extubation , 20.00 % and 7.78 % at 1 week after surgery ( P < 0.05 ) , and 3.33 % and 2.22 % at 2 weeks .