Table 4.

Multivariate analysis of factors with significant association with axillary lymph node metastases in univariate analysis

Factor	Adjusted odds ratio (95% confidence interval)	P value
Age	0.95 (0.91-1.00)	0.049
Multicentric disease	1.46 (0.41-5.22)	0.561
Tumor size >2 cm	2.48 (0.81-7.59)	0.113
Vascular and lymphatic invasion	17.94 (4.78-67.30)	<0.001
Epithelial hyperplasia	1.73 (0.52-5.77)	0.373
Necrosis	0.49 (0.13-1.84)	0.292
In situ carcinoma	1.70 (0.42-6.84)	0.455
Perineural invasion	1.13 (0.31-4.20)	0.853
CK5 positivity	0.003 (0.000-0.23)	0.009
CK14 positivity	5.22 (0.19-140.76)	0.326
EGFR positivity	3.94 (0.55-28.17)	0.171
Basal-like tumor	3.85 (0.18-83.02)	0.389