Table 1.

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

Variable	OR	95% CI	p value
Clinical lymph nodes, cN
cN1 vs cN2/3	1.769	1.121-2.792	0.014
ER status
Positive vs Negative	0.168	0.104-0.273	< 0.001
HER2 status
Positive vs Negative	3.079	1.960-4.838	< 0.001
Chemotherapy response			0.011
PR vs CR	0.248	0.096-0.640	0.004
PD/SD vs CR	0.297	0.128-0.689	0.005
Hilum structure of ALNs after NST			< 0.001
Partial/Eccentric/Narrow presence vs Presence	0.410	0.208-0.808	0.010
Absence vs Presence	0.175	0.077-0.395	< 0.001
Blood of ALNs after NST			0.004
Not rich/Absent vs Rich	2.202	1.340-3.617	0.002
Unknown vs Rich	0.880	0.308-2.519	0.812

Abbreviations: CR, complete response; PR, partial response; SD, stable disease; PD, progressive disease; ALNs, axillary lymph nodes