Table 1. Correlation between PTPRD expression and clinicopathological parameters of 513 gastric adenocarcinoma cases.

Clinicopathological parameters	n a	PTPRD expression		χ2	P value
		High	Low
All	513	252	261
Age (years)
<55	230	117	113	2.713	0.257
≧55	281	133	148
Gender				0.037	0.853
Male	338	165	173
Female	175	87	88
Tumor size				9.241	0.003*
<3 cm	84	54	30
≧3 cm	429	198	231
Tumor infiltration				15.182	0.004*
T1	67	42	25
T2	53	34	19
T3	175	86	89
T4a	179	73	106
T4b	39	17	22
Local lymph node metastasis				4.237	0.238
N0	189	103	86
N1	119	58	61
N2	82	38	44
N3	123	53	70
Distant metastasis				2.426	0.128
M0	466	234	232
M1	47	18	29
TNM staging				20.785	<0.001*
1	95	64	31
2	192	98	94
3	177	71	106
4	49	19	30

^{a a}Numbers of cases in each group. * Statistically significant (P<0.05).