Correlation of N-myc downstream-regulated gene 1 expression with clinical outcomes of colorectal cancer patients of different race/ethnicity

Table 1 Correlation of NDRG1 expression with clinicopathologic variables in Japanese cases

	Total cases (%)	Positive	Negative	P value
	n = 80	n = 55	n = 25
Age (yr)				0.622
> 66	48 (60.0)	34	14
< 66	32 (40.0)	21	11
Gender				0.649
Male	45 (56.3)	30	15
Female	35 (43.7)	25	10
Tumor location				0.164
Right-hemicolon	28 (35.0)	22	6
Left-hemicolon	52 (65.0)	33	19
Histopathological Type				0.067
Well	39 (48.8)	22	17	0.017
Moderate	38 (47.6)	31	7
Poor	1 (1.2)	1	0
Mucinous	1 (1.2)	1	0
Sig	1 (1.2)	0	1
Dukes’ stage				0.036
A	22 (27.5)	11	11
B	21 (26.3)	14	7
C	27 (33.7)	20	7
D	10 (12.5)	10	0
Liver metastasis				0.062
Negative	73 (91.3)	48	25
Positive	7 (8.7)	7	0
Lymph node metastasis				0.14
Negative	48 (60.0)	30	18
Positive	32 (40.0)	25	7
Lymphatic invasion				0.021
Negative	19 (23.8)	9	10
Positive	61 (76.2)	46	15
Venous invasion				0.0077
Negative	15 (18.8)	6	9
Positive	65 (81.2)	49	16
Depth of invasion				0.01
m	5 (6.3)	1	4
sm	8 (10.0)	4	4
mp	14 (17.5)	10	4
ss, a1	29 (36.3)	23	6
se, a2	23 (28.7)	16	7
si, ai	1 (1.2)	1	0

P < 0.05 is considered significant.