Table 5.

Analysis of factors affecting tumor burden in NSLN

Variable	Cases	Positive NSLN (x ± s), n	p
Tumor size
T1	111	0.59±1.351
T2	56	0.96±1.464	0.107
Positive SLNs
1	137	0.59±1.258
≥2	34	1.18±1.749	0.027
Mammographic mass margins
Circumscribed + microlobulated + obscure + indistinct	93	0.62±1.351
Spiculated	45	0.82±1.072	0.39
Ultrasonographic vascularity
Absent	36	0.39±0.934
Internal, rim, or internal + rim	127	0.83±1.505	0.032