Endoscopic submucosal dissection for esophageal precancerous lesions and early esophageal carcinoma: Analysis of efficacy and serum tumor markers

Table 5 Comparative analysis of serum tumor markers

Indicators	Control group (n = 60)	Research group (n = 60)	t value	P value
CEA (ng/mL)
Before surgery	12.65 ± 3.33	12.86 ± 3.66	0.329	0.743
After surgery	3.19 ± 2.15a	2.35 ± 1.60a	2.428	0.017
CA724 (U/mL)
Before surgery	27.53 ± 5.35	28.27 ± 5.40	0.754	0.452
After surgery	4.06 ± 3.70a	2.77 ± 1.93a	2.394	0.018
TSGF (U/mL)
Before surgery	96.50 ± 20.80	97.37 ± 22.00	0.223	0.824
After surgery	49.83 ± 13.26a	39.22 ± 14.18a	4.233	< 0.001

^aP < 0.05 vs the preoperative level.

CEA: Carcinoembryonic antigen; CA724: Carbohydrate antigen 724; TSGF: Tumor-specific growth factor.