Table 3.

Risk factors for axillary lymph node metastasis in breast cancer patients

	Univariate analysis			Multivariate analysis
	Odds ratio	95% CI	P-value	Odds ratio	95% CI	P-value
Age	1.00	0.99–1.00	0.72
Pathologic tumor size (invasive, cm)	1.58	1.48–1.69	< 0.01	1.48	1.34–1.63	< 0.01
MRI tumor size (invasive, cm)	1.29	1.23–1.35	< 0.01	1.19	1.11–1.28	< 0.01
Histology type (Non-IDC) vs. IDC	0.59	0.43–0.80	< 0.01	0.47	0.32–0.69	< 0.01
Histological Grade (II, III) vs. I	1.79	1.43–2.25	< 0.01	1.33	1.02–1.73	0.04
ER (positive) vs. negative	1.31	1.04–1.64	0.02	1.52	0.90–2.59	0.12
PR (positive) vs. negative	1.26	1.04–1.52	0.02	1.91	1.31–2.80	< 0.01
HER-2 (positive) vs. negative	1.20	0.97–1.48	0.09
Ki -67% (> 14) vs. ≦14	1.48	1.24–1.76	< 0.01	1.16	0.93–1.46	0.20

IDC invasive ductal carcinoma, ER estrogen receptor, PR progesterone receptor, HER-2 human epidermal growth factor receptor2, CI Confidence interval

*p < 0.05