Table 3. Relation between the expression of GPC1 and clinicopathological characteristics.

		GPC1		p value
		Positive	Negative	chi-square test	Fisher’s exact test
Sex
	Male	127	66	0.065	0.0716
	Female	85	27
Age (yr)
	< 60	41	30	0.0140*	0.0183*
	≧ 60	171	63
Tumor location
	Head	120	76	0.0001*
	Body-tail	81	16
	Whole pancreas	11	1
Tumor size (cm)
	< 2	18	12	0.3015
	2 to 5	154	68
	> 5	36	11
TNM stage
	I–II	201	90	0.4508	0.563
	III–IV	11	3
Histological differentiation
	Well	51	19	0.525
	moderately	122	57
	Poorly	17	39
Lymph node involvement
	(+)	133	61	0.6332	0.6987
	(−)	79	32
Lymph vessel invasion
	(+)	137	63	0.279	0.6947
	(−)	75	30
Vascular invasion
	(+)	199	75	0.0004*	0.0008*
	(−)	13	18
Perineural invasion
	(+)	198	83	0.7137	0.8051
	(−)	14	7