Table 3.

Comparison of the number of different types of operations between the two groups.

Term of operation	VSD	Improved VSD	Χ2	P value
Radical resection of gastric cancer	22	33	2.76	.996
Radical resection for colon cancer	33	44
Radical resection of sigmoid colon cancer	22	33
Rectal Malignant Resection	33	55
Open appendectomy	11	11
Total proctocolectomy	22	11
Exploratory laparotomy	55	77
Intestinal fistula (laparotomy, adhesion lysis, intestinal resection, and anastomosis)	22	22
Ileostomy	22	22
Colostomy	33	22

VSD = improved vacuum-sealing drainage.