There was no difference between the two groups of urge FI (9/20) and passive FI (11/20) except the balloon volume that give constant sensation to defecate and the max tolerable volume which was lower in the urge FI group (48.8 ± 11.3 vs 70.0 ± 21.8 ml and 90.0 ± 28.3 vs 127.5 ± 26.7 ml; p < 0.05).