Delayed urinary catheter removal was associated with a higher incidence of urinary tract infections ( 15 % ) , delayed ambulation time ( 10.3 h ) and longer hospital stay ( 5.6 days ) compared to the early ( 1.4 % , 4.1 h and 3.2 days respectively ) and intermediate ( 3.7 % , 6.8 h and 3.4 days respectively ) removal groups .