Table 4.

Multivariate logistic regression analysis of factors associated with involvement of three or more ALNs

Variable	Odds ratio	95% CI	p-value
Age	0.99	0.97-1.00	0.097
Tumor size by preoperative US (cm)	1.08	0.91-1.28	0.392
Axillary US grade	2.13	1.80-2.52	< 0.001
Chest CT ALN positive	4.78	3.07-7.45	< 0.001

ALN, axillary lymph node; CI, confidence interval; US, ultrasonography; CT, computed tomography.