Table 1. Patients’ characteristics.

	With liver metastasis	Without liver metastasis	Transfer rate (%)	Z	P
Primary tumor (UICC stage)
T0	0	2	0.00	-0.59	0.555
T1	17	102	14.29
T2	52	211	19.77
T3	3	35	7.89
T4	3	4	42.86
Lymph node metastasis (UICC stage)
N0	12	110	9.84	-3.883	<0.001
N1	20	112	15.15
N2	12	65	15.58
N3	31	67	31.63
TNM staging (UICC stage)
0	0	2	0.00	-2.961	0.003
I	6	43	12.24
II	24	168	12.50
III	45	141	24.19
Immunohistochemical testing
ER+	39	171	18.57	-0.347	0.729
ER-	45	178	20.18
PR+	32	161	16.58	-0.466	0.641
PR-	44	188	18.97
HER-2/neu (cerbB-2)+	38	109	25.85	-3.024	0.002
HER-2/neu (cerbB-2)-	34	233	12.73