Table 3
The operation name in subgroups

Operation type	Operation name	Number
Open colectomy	Right hemicolectomy	5
	Extended right hemicolectomy	4
	Anterior resection	9
	Lower anterior resection	10
	Ultra lower anterior resection	2
Laparoscopic colectomy	Laparoscopic ileocecectomy	2
	Laparoscopic right hemicolectomy	18
	Laparoscopic transverse colon segmental resection	1
	Laparoscopic anterior resection	4
	Laparoscopic lower anterior resection	5
HAL*-colectomy	HAL*-left hemicolectomy	1
	HAL*-extended left hemicolectomy	1
	HAL*-sigmoid colon segmental resection	3
	HAL*-anterior resection	15
	HAL*-lower anterior resection	9
	HAL*-total colectomy	1

HAL, hand-assisted laparoscopic.