Table 2.

Multivariate logistic regression analysis of variables associated with axillary pCR in the training set (N=378).

Variable	OR (95%CI)	P-value
Radiological response rate of breast tumor (%)	2.531 (1.048 - 6.112)	0.039*
Longest diameter of positive node after NST (mm)	0.956 (0.918 - 0.995)	0.028*
ER status		0.006*
Negative	1.0
Positive	0.502 (0.306 - 0.821)
HER2 status		0.048*
Negative	1.0
Positive	1.638 (1.004 - 2.673)
Breast pCR		< 0.001*
No	1.0
Yes	5.395 (2.896 - 10.049)

pCR, pathologic complete response; NST, neoadjuvant systemic therapy; ER, estrogen receptor; HER2, human epidermal growth factor receptor 2; *Asterisks indicate statistically significant associations (p<0.05).