Table 1. Clinical and pathologic characteristics of 419 patients between LN(−) and LN(+) tumors.

Characteristics	LN (−)	LN (+)	P value
Age, years, mean (range) (N = 418)	52.65 ± 10.82	50.31 ± 11.19	0.031
Tumor size (cm) (N = 405)	1.87 ± 1.04	2.48 ± 1.23	0.000
ER (N = 419)	52.03 ± 39.62	50.77 ± 38.96	0.745
PR (N = 419)	30.93 ± 36.28	31.27 ± 35.63	0.922
Ki-67 (N = 413)	25.49 ± 19.56	29.63 ± 21.36	0.041
ER (N = 419)			0..844
Negative	77 (34.1)	64 (33.2)
Positive	149 (65.9)	129 (66.8)
PR (N = 419)			0.403
Negative	117 (51.8)	92 (47.7)
Positive	109 (48.2)	101 (52.3)
Ki-67 (N = 413)			0.016
Negative	77 (34.5)	45 (23.7)
Positive	146 (65.5)	145 (76.3)
HER-2 (N = 346)			0.926
Negative	105 (55.6)	88 (56.1)
Positive	84 (44.4)	69 (43.9)
Histological grade (N = 418)			0.130
I	19 (8.4)	9 (4.7)
II–III	207 (91.6)	183 (95.3)
Lymphovascular invasion (N = 413)			0.000
Yes	31 (13.9)	86 (45.3)
No	192 (86.1)	104 (54.7)