Table 4.

Univariable and multivariable models for breast-conserving surgery

Variable	Univariable			Multivariable
	OR	95% CI	P Value	OR	95% CI	P Value
Age	1.02	1.01-1.04	0.002	1.02	1.01-1.04	0.001
Baseline clinical T category			<0.0001			<0.0001
T0/T1	---	---		---	---
T2	1.34	0.86-2.10		1.30	0.82-2.06
T3	0.46	0.27-0.77		0.43	0.25-0.74
T4	0.20	0.06-0.61		0.17	0.06-0.54
Baseline clinical N category			0.22			0.62
N1	---	---		---	---
N2	0.63	0.31-1.31		0.82	0.37-1.79
Tumor subtype			0.02			0.04
Hormone-receptor-positive,	---	---
HER2-negative				---	---
HER2-positive	1.43	0.99-2.05		1.48	1.02-2.16
Triple-negative	1.67	1.14-2.44		1.54	1.03-2.29