Table 2.

Differences of breast cancer treatment in patients with bilateral and unilateral mastectomy between 2002 and 2010 (n=373)

Characteristics	Bilateral mastectomy	Unilateral mastectomy	P value
N	207	166
Chemotherapy			0.004*
Yes	126 (60.9%)	125 (75.3%)
No	81 (39.1%)	41 (24.7%)
Neo-adjuvant chemotherapy	28 (13.5%)	44 (26.5%)	0.002*
Radiation			<0.001*
Yes	71 (34.3%)	90 (54.2%)
No	111 (53.6%)	44 (26.5%)
Unknown	25 (12.1%)	32 (19.3%)
Endocrine therapy			0.448
Yes	83 (40.1%)	73 (44.0%)
No	70 (33.8%)	46 (27.7%)
Unknown	54 (26.1%)	47 (28.3%)
Lymph node surgery			<0.001*
SLNB	96 (46.4%)	18 (10.8%)
ALND	104 (50.2%)	147 (88.6%)
None	7 (3.4%)	1 (0.6%)
Reconstruction surgery			<0.001*
Yes	157 (75.8%)	91 (54.8%)
No	50 (24.2%)	75 (45.2%)
Type of reconstruction			<0.001*
Tissue expanders/implants	103 (49.8%)	21 (12.7%)
Flaps	54 (26.1%)	70 (42.2%)
Both flaps and implants	7 (3.4%)	1 (0.6%)

SLNB: sentinel lymph node biopsy; ALND: axillary lymph node dissection;

^* P value <0.05.