1486 / 1983
Patient, tumor and treatment characteristics by surgery type
Characteristic
Lumpectomy
Mastectomy
Frequency, n
302
353
Patient age at biopsy, years (p = 0.13)
Median
40.5
41.9
Menopausal status at primary (p = 0.003)
Pre-
240 (79.5)
240 (68.0)
Post-
52 (17.2)
89 (25.2)
Peri-
10 (3.3)
24 (6.8)
BRCA gene mutation (p = 0.01)
1
197 (65.2)
197 (55.8)
2
105 (34.8)
156 (44.2)
Histology (p = 0.07)
Infiltrating ductal
258 (85.4)
292 (82.7)
Lobular or Infiltrating ductal & lobular
10 (3.3)
26 (7.4)
Medullary or other
34 (11.2)
35 (9.9)
Pathologic T-stage (p = 0.001)
T0/T1
214 (70.8)
203 (57.5)
T2
81 (26.8)
125 (35.4)
T3
4 (1.3)
16 (4.5)
Estrogen receptor (p = 0.006)
Positive
90 (29.8)
126 (35.7)
Negative
154 (51.0)
131 (37.1)
Unknown
54 (17.9)
93 (26.4)
Pierce et al. BCRT, 2010