Perioperative anticoagulation reduces the incidence of venous thromboembolism in patients undergoing gastrointestinal surgery

Table 2 Comparison of surgical conditions between the two groups

Variables	Observation group (n = 101)	Control group (n = 104)	t or χ2	P value
Intraoperative hemorrhage volume (mL)	30.0 (20.0-50.0)	30.0 (20.0-50.0)	0.125	0.945
Operative time (minute)	140.0 (120.0-174.0)	135.0 (105.0-175.0)	0.667	0.505
Drainage volume (mL)	710.0 (435.0-1140.0)	720.0 (480.0-1205.0)	0.092	0.824
Drainage time (day)	4.0 (3.0-5.8)	4.0 (3.0-6.0)	0.852	0.463
Postoperative bleeding	2	1	0.846	0.378
Pathological findings	-	-	1.856	0.366
Gastric cancer	12	8	-	-
Intestinal cancer	42	32	-	-
Others	44	62	-	-