Table 3.

Multivariate Analysis of Clinicopathologic Factors with Non-SLN Metastases

Characteristic	Odds Ratio	95% CI	P-value
Pathologic tumor size (cm) (per unit)	1.227	1.070–1.408	.004
Histology			.03
IDC	Reference	-
ILC	1.331	0.598–2.962
mixed IDC/ILC	0.336	0.149–0.756
other	0.463	0.090–2.379
LVI			.14
present	1.594	0.8292–2.279
absent	Reference
Number of SLN identified	0.604	0.502–0.727	<.001
Number of positive SLN	2.120	1.486–3.026	<.001
SLN maximum metastasis size (mm)	1.136	1.076–1.199	<.001
Extranodal extension			.01
present	1.917	1.163–3.160
absent	Reference

Abbreviations: CI, confidence interval; IDC, invasive ductal carcinoma; ILC, invasive lobular carcinoma; LVI, lymphovascular invasion ; SLN, sentinel lymph node