Prognostic implications of estrogen receptor 1 and vascular endothelial growth factor A expression in primary gallbladder carcinoma

Table 2 Association between estrogen receptor 1 and vascular endothelial growth factor A expression and clinicopathological characteristics of gallbladder carcinoma

Characteristic	ER1 expression		P-value	VEGF-A expression		P-value
	High	Low		High	Low
Gender			0.022			0.099
Male	15	18		25	8
Female	32	13		26	19
Age (yr)			0.151			0.095
≤ 55	18	17		23	12
> 55	29	14		28	15
Gallstones			0.370			0.056
Present	32	24		33	23
Absent	15	7		18	4
TNM stage			0.177			0.781
II	17	16		21	12
III/IV	30	15		30	15
Differentiation			0.205			0.010
Well	16	15		15	16
Moderate/poor	31	16		36	11

ER1: Estrogen receptor 1; VEGF-A: Vascular endothelial growth factor A; TNM: Tumor node metastasis.