Successful bowel cleansing rate was significantly higher in the PEG+A sc ( N = 242 ) than the NaP ( N = 114 ) group ( PEG+A sc 93.4 % [ 95 % CI 89.5-96 .2 ] versus NaP 22.8 % [ 15.5-31 .6 % ] , p < 0.0001 ) .