TABLE 3

Univariable Analysis Results for SLN Detection Preoperatively and Intraoperatively

	SLN in image (n = 352)			SLN harvested (n = 352)
Parameter	Yes	No	P (2-sided, χ²)	Yes	No	P (2-sided, χ²)
Age (0 missing)
<50 y	96	2	0.307	97	1	0.202
≥50 y	243	11		245	9
BMI^* (17 missing)
Overweight or obese	192	11	0.031	196	7	0.325
Normal weight	123	1		122	2
Tumor location (15 missing)
Upper outer quadrant	110	5	0.523	111	4	0.465
Other	225	7		227	5
Molecular subtype^†
Luminal	267	8	0.012	271	4	<0.001
HER-2	30	4		29	5
N stage (4 missing)
N0	267	10	0.744	270	7	0.891
N1–N2	69	2		69	2
Neoadjuvant therapy (0 missing)
Yes	42	3	0.257	42	3	0.098
No	297	10		300	7
Injection area (7 missing)
Peri- or intratumoral	150	10	0.009	152	8	0.010
Intradermal or subareolar	183	2		184	1

↵* BMI information was missing for 14 patients, one of whom had bilateral lesion. Additionally, 3 patients were excluded from BMI codification groups because of low body weight.
↵† There were 18 missing dates, and basallike tumors were excluded (n = 25).