Table 2.

Correlation between histopathological characteristics and S100A9 immunohistochemical staining in ESCC.

	Cases	No expression	Expression	p value
Total	288	192	96	<0.01
Age
≥56 years	140	89	51	—
<56 years	148	105	43
Gender
Males	200	139	61	—
Females	88	54	34
Pathological grade
Well differentiated	36	—	36	<0.01
Moderately differentiated	141	93	48
Poorly differentiated	111	99	12