Table 2. Postoperative complication according to Clavien-Dindo classification.

Complications		Omori et al. [5] (n=7)	Ahn et al. [10] (n=22)	Omori et al. [32] (n=45)	Ahn et al. [18] (n=50)	Kim et al. [17] (n=48)	Omori et al. [27] (n=90)
Grade I
	Wound	2	0	1	2	0	0
	Delayed gastric emptying	1	1	1	0	2	0
	Ileus	0	0	0	0	2	0
	Fever	0	0	0	1	0	0
	Atelectasis	0	0	0	1	0	0
Grade II
	Wound	0	0	0	0	2	1
	Delayed gastric emptying	0	0	0	0	0	1
	Ileus	0	0	0	0	1	0
	Pseudomembranous colitis	0	0	0	1	0	0
	Stenosis	0	0	0	0	2	0
	Others	0	0	0	0	0	1
Grade III
	Intra-abdominal fluid collection	0	0	0	1	0	0
	Intestinal obstruction	0	0	0	0	1	0
	Cholecystitis	0	0	0	0	0	1
Overall complications		3 (42.9)	1 (4.5)	2 (4.4)	6 (12)	10 (20.8)	4 (4.4)

Values are presented as number (%). Six studies that reported postoperative complications according to the Clavien-Dindo classification are included in this table.