Table 1.

Relation between CD47 expression and clinical characteristics of patients with gastric cancer

Group	Discovery set (n = 253)			Validation set (n = 200)
	CD47			CD47
	Low	High	P value	Low	High	P value
Age(years)			0.236			0.527
< 60	60	71		53	41
≥ 60	65	57		55	51
Gender			0.898			0.959
Male	85	88		79	67
Female	40	40		29	25
Location			0.589			0.753
Proximal	29	27		30	24
Middle	18	31		10	8
Distal	78	70		68	60
Tumor size(cm)			0.481			0.150
≥ 4 cm	55	62		43	46
< 4 cm	70	66		65	46
Lauren’s classification			0.426			0.682
Intestinal type	77	67		78	64
Non-intestinal type	48	61		30	28
Grade			0.670			0.089
1	7	8		5	3
2	25	20		30	16
3	93	100		73	73
Depth of tumor invasion			0.188			0.006
T1	29	22		27	11
T2	19	15		20	8
T3	18	25		17	27
T4	59	66		44	46
Lymph node metastasis			0.002			0.310
N0	65	42		40	30
N1	9	18		12	12
N2	28	21		24	12
N3	23	47		32	38
TNM stage			0.003			0.023
I	43	23		34	15
II	30	33		21	21
III	52	72		53	56

P value < 0.05 marked in bold font shows statistical significance