Table 2.

Multivariate logistic regression analysis of variables associated with axillary pCR after the operation.

Variable	OR	95% CI	p value
Clinical lymph nodes, cN
cN1 vs cN2/3	2.160	1.293-3.608	0.003
ER status
Positive vs Negative	0.218	0.127-0.373	< 0.001
HER2 status
Positive vs Negative	1.987	1.191-3.317	0.009
Hilum structure of ALNs after NST			< 0.001
Partial/Eccentric/Narrow presence vs Presence	0.392	0.184-0.835	0.015
Absence vs Presence	0.165	0.067-0.410	< 0.001
Blood of ALNs after NST			0.003
Not rich/Absent vs Rich	2.212	1.276-3.833	0.005
Unknown vs Rich	0.591	0.196-1.782	0.350
Pathological size, mm	0.949	0.921-0.979	0.001
Vascular invasion
No vs Yes	2.253	1.025-4.952	0.043
Miller-Payne grade
4-5 vs 1-3	2.659	1.331-5.310	0.006

Abbreviations: ALNs, axillary lymph nodes