Table 1
History of previous abdominal operation in subgroups

Previous operation name Subgroups Number
OC* group LC group HALC group
Appendectomy 1 5 2 8
Cesarean delivery 0 1 2 3
Cholecystectomy 3 0 2 5
Herniorrhaphy 0 0 2 2
Hysterectomy 1 1 2 4
Myomectomy 1 0 0 1
Unknown laparotomy 1 0 1 2
Total 7 (23.3%) 7 (23.3%) 11 (36.7%) 25 (27.8%)
OC, open colectomy; LC, laparoscopic colectomy; HALC, hand-assisted laparoscopic colectomy.