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

Table 4 Comparison of coagulation function indicators between the two groups, mean ± SD

Variables	Observation group			Control group			t or χ2/P value
	0 day	3 day	7 day	0 day	3 days	7 days	0 day	3 days	7 days
PT (seconds)	11.20 (10.90-11.70)	11.60 (11.20-12.00)	11.80 (11.30-12.43)	11.20 (10.90-11.80)	12.03 (11.85-12.20)	11.90 (11.35-12.45)	0.169/0.865	1.443/0.152	0.415/0.678
Fib (g/L)	2.64 (2.44-3.15)	6.50 (6.30-7.10)	5.84 (5.26-6.44)	2.97 (2.71-3.35)	6.67 (6.35-7.13)	6.39 (5.81-6.73)	2.091/0.077	0.693/0.488	0.447/0.655
DDi (mg/L)	0.19 ± 0.11	0.80 ± 0.25	2.97 ± 0.45	0.28 ± 0.09	0.98 ± 0.32	2.37 ± 0.55	1.380/0.168	2.374/0.018	0.698/0.485
APTT (seconds)	25.50 (24.0-27.1)	30.16 (28.14-32.46)	26.96 (25.68-28.04)	25.00 (24.0-26.20)	30.28 (28.36-32.08)	27.86 (25.54-29.65)	0.369/0.712	0.124/0.901	0.762/0.496
INR (%)	0.89 ± 0.07	0.94 ± 0.06	0.94 ± 0.09	0.89 ± 0.07	0.95 ± 0.07	0.94 ± 0.09	0.077/0.939	0.722/0.472	0.652/0.647
TT (seconds)	16.30 ± 2.45	14.10 ± 1.96	14.65 ± 1.88	16.20 ± 2.11	13.90 ± 1.75	14.50 ± 2.23	1.149/0.251	0.931/0.352	0.669/0.474

PT: Prothrombin time; Fib: Fibrinogen; DDi: D-dimer; APTT: Activated partial thromboplastin time; INR: International Normalized Ratio; TT: Thrombin time.