Table 1. Relationship between ERp19 expression level and clinicopathological variables in 90 GC patients.

Clinicopathological variable	No. of patients	ERp19 staining		P value
		Weak	Strong
Normal tissue	90	56	34	0.007*
Gastric carcinoma	90	38	52
Age (years)				0.423
<60	29	14	15
≽60	61	24	37
Gender				0.728
Male	67	29	38
Female	23	9	14
Tumor size (cm)				0.041*
≼5	34	19	15
>5	56	19	37
Histological grade				0.584
Well, Moderately	24	9	15
Poorly, undifferentiated	66	29	37
Lauren's classification				0.108
Intestinal-type	56	20	36
Diffuse-type	34	18	16
Lymph node involvement				0.034*
Absence	25	15	10
Presence	65	23	42
TNM stage				0.433
I+II	36	17	19
III+IV	54	21	33

Immunohistochemistry (IHC) scores were calculated by multiplying the percentage of positive cells (0 is <5% positive cells, 1 is 5%-25% positive cells, 2 is 25%-50% positive cells, 3 is 50%-75% positive cells and 4 is >75% positive cells) by stain intensity (0 is no staining, 1 is weak staining, 2 is moderate staining and 3 is strong staining) in five different high power fields for each section. The IHC score of 0-3 was defined as weak expression and 4-12 as strong expression.