TABLE 2.

Univariate and multivariable associations between clinicopathological factors and the odds of finding 3 or more SLNs

	Univariable		Multivariable
	Odds ratio (95% CI)	P	Odds ratio (95% CI)	P
Age per 5-year increase	0.88 (0.77, 1.01)	0.07
BMI, per 5-unit increase	0.77 (0.62, 0.96)	0.02	0.77 (0.62, 0.96)	0.02
Palpable node at presentation	0.91 (0.43, 1.90)	0.80
Palpable tumor at presentation	1.50 (0.61, 3.73)	0.38
cT at presentation ref: 1
2	0.96 (0.37, 2.46)	0.93
3	0.39 (0.15, 1.04)	0.06
Subtype ref: HR+ HER2−
HR+ HER2+	0.59 (0.27, 1.30)	0.19
HR− HER2+	0.64 (0.25, 1.65)	0.36
HR− HER2−	0.82 (0.33, 2.01)	0.66
Histology ref: ductal
Lobular and mixed	0.94 (0.27, 3.23)	0.92
Micropapillary and mixed	1.49 (0.34, 6.46)	0.60
Apocrine and mixed	0.47 (0.17, 1.30)	0.15
Other	1.37 (0.18, 10.6)	0.76
LVI	0.46 (0.24, 0.87)	0.02	0.46 (0.24, 0.87)	0.02
Grade III ref I/II	1.20 (0.64, 2.27)	0.56

Modeling odds of finding ≥ 3 SLNs (n = 531) versus < 3 SLNs (n = 42).

CI confidence interval, BMI body mass index, HR hormone receptor, LVI lymphovascular invasion