Table 3.

Multiple Linear Regression Analysis, Predictors for Postoperative Lumpectomy Size

Predictors	Model 1 (R2 = 0.616)			Model 2 (R2 = 0.598)
	β Coefficient	95% CI	P	β Coefficient	95% CI	P
Intercept	31.868	18.034, 45.703	<0.001	32.710	20.394, 45.026	<0.001
BMI	1.133	0.819, 1.446	<0.001	1.127	0.808, 1.446	<0.001
Age	0.140	0.013, 0.268	0.031	—	—	—
Breast size
B	1.560	−3.499, 6.619	0.545	1.852	−3.316, 7.020	0.482
C	4.774	−0.278, 9.826	0.064	4.962	−0.187, 10.110	0.059
D	9.736	4.534, 14.938	<0.001	9.733	4.418, 15.047	<0.001
E	11.423	5.643, 17.204	<0.001	12.322	6.423, 18.221	<0.001
F	13.007	6.031, 19.983	<0.001	12.916	5.792, 20.039	<0.001
G	16.760	7.313, 26.206	<0.001	15.969	6.327, 25.610	0.001
H	34.983	20.234, 49.732	<0.001	34.710	19.632, 49.788	<0.001
I	27.611	10.118, 45.105	0.002	31.376	13.562, 49.190	<0.001
Maximum radiologic diametera	0.540	0.446, 0.634	<0.001	0.597	0.504, 0.690	<0.001
No plastic surgeon	−7.095	−10.361, −3.829	<0.001	—	—	—

^aMaximum diameter of total area to be excised on magnetic resonance imaging, ultrasound, or mammography, including all foci of pathologically proven invasive tumor and carcinoma in situ and nonmass enhancement.