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

Table 1 Demographic and clinical characteristics of the patients

Variables	Observation group (n = 101)	Control group (n = 104)	t or χ2	P value
Sex	-	-	2.537	0.111
Female	49	39	-	-
Male	52	65	-	-
Age (years), M (Q1, Q3)	66 (56.5, 76)	60.5 (52, 69.25)	4.452	0.065
BMI (kg/m2), mean ± SD	23.14 ± 3.03	22.79 ± 3.16	0.800	0.425
Smoking history	-	-	0.180	0.671
Yes	35	39	-	-
No	66	65	-	-
Drinking history	-	-	0.547	0.460
Yes	41	37	-	-
No	60	67	-	-
Hypertension	19	20	0.058	0.939
Diabetes	11	13	0.128	0.720
Heart disease	0	2	0.505	0.477

M: Median; Q1: 25^th percentile; Q3: 75^th percentile; BMI: Body mass index.