Correlation of N-myc downstream-regulated gene 1 overexpression with progressive growth of colorectal neoplasm

Table 3 Comparison of positive units (PU) of NDRG1 protein in all groups (P value)

Group	Normal colorectal mucosa	Colorectal adenomas	Non-metastatic CRCs	Metastatic CRCs	Regional lymph node metastatic sites
Normal colorectal mucosa	——	aP < 0.05	bP < 0.01	bP < 0.01	bP < 0.01
Colorectal adenomas	aP < 0.05	——	dP < 0.01	dP < 0.01	dP < 0.01
Non-metastatic CRCs	bP < 0.01	dP < 0.01	——	eP < 0.05	fP < 0.01
Metastatic CRCs	bP < 0.01	dP < 0.01	eP < 0.05	——
Regional lymph node metastatic sites	bP < 0.01	dP < 0.01	fP < 0.01		——