Table 2. Multivariate analysis of the type of axillary surgery and armpit surgery.

Variable		OR	CI (95%)		p-value
Armpit surgery	SLN biopsy	Ref.	Ref.	Ref.	Ref.
	SLN biopsy + lymphadenectomy or lymphadenectomy alone	7.77	2.77	21.81	<0.001
BMI	Not obese	Ref.	Ref.	Ref.	Ref.
	Obese	2.32	1.44	3.74	<0.001
	Constant	0.031

SLN = Sentinel lymph node; BMI = body mass index