[Retracted] Efficacy of Laparoscopic Radical Resection Combined with Neoadjuvant Chemotherapy and Its Impact on Long-Term Prognosis of Patients with Colorectal Cancer

Table 3

Evaluation of serum tumor markers .

Item	Time	Surgical group (n = 40)	Combination group (n = 40)	t	P
CEA (ng/ml)	Preoperation	28.47 ± 7.36	29.48 ± 8.26	−0.577	0.566
	Postoperation	14.55 ± 4.14	8.87 ± 2.11	7.731	<0.001
CA199 (kU/L)	Preoperation	48.28 ± 14.29	50.45 ± 15.23	−0.657	0.513
	Postoperation	33.41 ± 9.58	19.66 ± 6.32	7.61	<0.001
VEGF (ng/L)	Preoperation	660.27 ± 143.52	657.35 ± 138.87	0.092	0.927
	Postoperation	509.67 ± 95.28	442.89 ± 84.53	3.316	0.001
MMP9 (ng/L)	Preoperation	568.74 ± 164.62	580.74 ± 156.11	−0.335	0.739
	Postoperation	411.53 ± 85.39	348.96 ± 78.44	3.413	0.001