Table 1. Association between the GRP78 expression in the tumor tissues and the clinicopathologic variables of PDAC.

Variable		GRP78 expression	p value*
	No. of cases	Low high
Age (years)			0.361
≥65	62	37 25
<65	118	62 56
Gender			0.566
Male	113	64 49
Female	67	35 32
Tumor location			0.876
Head	101	54 47
Body/tail	67	35 32
Tumor size			0.079
>4 cm	76	35 41
≤4 cm	94	56 38
Histological grade			0.406
G1–2	120	62 58
G3	37	22 15
pT stage			0.026
T1–2	96	58 38
T3–4	74	32 42
pN stage			0.487
N0	95	52 43
N1	71	35 36
Perineural invasion			0.111
Positive	84	40 44
Negative	87	52 35

Note: The boldface type indicates a significant difference. PDAC, pancreatic ductal adenocarcinoma; G1, well differentiated; G2, moderately differentiated; G3, poorly differentiated; T, tumor; N, lymph node. * Chi-square test.