Table 2.

Clinical features in relation to methylation of PTCH1a TRR in gastric cancer

Variable	PTCH1methylation
	n	Positive	Negative	P value
Total	170	55	115
Clinicopathological parameters
Sex
Male	89	26	63	0.359
Female	81	29	52
Age of onset (yr)
< 50	68	22	46	1.000
≥ 50	102	33	69
Clinical stage
pT1	75	25	50	0.808
pT2-4	95	30	65
Lymph node metastasis
pN0	55	16	39	0.530
pN1-3	115	39	76
Histological grade
Well and moderately differentiated	63	19	44	0.735
Poorly differentiated	107	36	71