Table 2.

Expressions of CD147 and MMP-9^a in type II/III AEG^b and para-tumor tissues

Tissue type	CD147		MMP-9
	-	+-+++	-	+-+++
Para-tumor tissue	18	2	17	3
Type II/III AEG tissue	32	42	24	50
χ2	13.825		17.692
P	0.000		0.000

^aMMP-9, matrix metalloproteinase 9;

^bAEG, adenocarcinoma of esophagogastric junction.