Table 1. Comparison of CA19-9, Bcl-2, and CYFRA21-1 levels between the two group.

	Esophageal cancer group (n=74)	Healthy group (n=55)	t	P
CA19-9 (U/mL)	33.04±10.32	18.57±7.07	9.443	<0.001
Bcl-2 (ng/mL)	17.67±4.87	11.19±6.52	6.186	<0.001
CYFRA21-1 (μ/mL)	5.14±2.95	2.34±0.6	7.953	<0.001

CA19-9, carbohydrate antigen 19-9; Bcl-2, B-cell leukemia/lymphoma-2 protein; CYFRA21-1, cytokeratin 19 fragment antigen 21-1.