Table 3.

Cox proportional hazards model for axillary recurrence, regional recurrence, disease-free survival, and overall survival.

	Univariate		Multivariate before PSMa		5-year survival probability (%)b	Multivariate after PSMa
	HR (95% CI)	p-value	HR (95% CI)	p-value		HR (95% CI)	p-value
Axillary recurrence
ALND	1 (Ref)		1 (Ref)		97.3	1 (Ref)
SLNB-only	0.76 (0.28–2.02)	0.586	0.86 (0.31–2.44)	0.780	96.7	0.93 (0.28–3.12)	0.908
Regional recurrence
ALND	1 (Ref)		1 (Ref)		97.3	1 (Ref)
SLNB-only	0.84 (0.32–2.17)	0.720	0.87 (0.31–2.42)	0.789	96.7	0.92 (0.28–3.10)	0.899
Disease recurrence
ALND	1 (Ref)		1 (Ref)		88.9	1 (Ref)
SLNB-only	0.66 (0.40–1.07)	0.093	0.54 (0.32–0.92)	0.023	84.2	0.70 (0.40–1.23)	0.209
Death
ALND	1 (Ref)		1 (Ref)		88.8	1 (Ref)
SLNB-only	0.77 (0.45–1.32)	0.351	0.75 (0.40–1.40)	0.359	87.2	0.96 (0.51–1.79)	0.887

SLNB sentinel lymph node biopsy, ALND axillary lymph node dissection, HR hazard ratio, CI confidence interval, PSM propensity score matching.

^aAdjusted for variables listed in (Table 1).

^bKaplan–Meier estimate after PSM.