Table 1. The relationship between LIF expression and clinicopathological variables of breast cancer.

Clinicopathological variables	LIF Expression		P
	Negative (Number)	Positive (Number)
Age			0.001
≤40	16	45
>40	153	160
Race			0.094
White	147	167
Black	16	34
Others	6	4
Histology			0.159
Ductal	142	182
Lobular	17	10
Others	10	12
Tumor size			0.179
≤2cm	123	137
>2cm	31	49
Nodal status			0.757
Negative	72	95
Positive	28	33
Unknown	69	77
ER			0.025
Negative	81	74
Positive	87	128
PR			0.002
Negative	92	77
Positive	77	125
HER2			0.307
Negative	141	162
Positive	27	41