Table 1 Patient characteristics
Characteristic | non-IBC No. | IBC No. | ||||
|---|---|---|---|---|---|---|
(n = 677) | % | (n = 189) | % | P | ||
Age, median (range), y | 50 (22–83) | 51 (23–75) | 0.56 | |||
BMI, mean ± SD, m2 | 29.3 ± 6.8 | 31.7 ± 7.5 | 0.93 | |||
Menopausal status | 0.002 | |||||
Pre | 352 | (52) | 75 | (40) | ||
Post | 304 | (45) | 108 | (57) | ||
Unknown | 21 | (3) | 6 | (3) | ||
cT stage | < 0.001 | |||||
3 | 395 | (58) | 0 | (0) | ||
4 | 282 | (42) | 189 | (100) | ||
Unknown | 0 | (0) | 0 | (0) | ||
cN stage | 0.046 | |||||
0 | 57 | (8) | 29 | (15) | ||
1 | 415 | (61) | 109 | (58) | ||
2 | 69 | (10) | 18 | (10) | ||
3 | 135 | (20) | 33 | (17) | ||
Unknown | 1 | (1) | 0 | (0) | ||
Histology | 0.003 | |||||
Ductal | 507 | (75) | 160 | (85) | ||
Lobular | 103 | (15) | 12 | (6) | ||
Mixed | 46 | (7) | 9 | (5) | ||
Other | 21 | (3) | 8 | (4) | ||
Histological grade | < 0.001 | |||||
1 | 46 | (7) | 4 | (2) | ||
2 | 313 | (46) | 67 | (35) | ||
3 | 288 | (43) | 107 | (57) | ||
Unknown | 30 | (4) | 11 | (6) | ||
Lymphatic invasion | 0.277 | |||||
Positive | 389 | (57) | 116 | (61) | ||
Negative | 271 | (40) | 67 | (36) | ||
Unknown | 17 | (3) | 6 | (3) | ||
Vascular invasion | 0.512 | |||||
Positive | 400 | (59) | 106 | (56) | ||
Negative | 260 | (38) | 77 | (41) | ||
Unknown | 17 | (3) | 6 | (3) | ||
NAC regimen | 0.308 | |||||
A | 74 | (11) | 27 | (14) | ||
T | 28 | (4) | 5 | (2) | ||
A + T | 572 | (84) | 156 | (83) | ||
Other | 3 | (1) | 1 | (1) | ||
Adjuvant chemotherapy | 0.001 | |||||
Yes | 120 | (13) | 54 | (28) | ||
No | 557 | (87) | 135 | (72) | ||
Adjuvant endocrine therapy | 0.007 | |||||
Yes | 590 | (87) | 150 | (79) | ||
No | 87 | (13) | 39 | (21) | ||
Neoadjuvant radiation therapy | 0.056 | |||||
Yes | 6 | (1) | 5 | (3) | ||
No | 671 | (99) | 184 | (97) | ||
Adjuvant radiation therapy | 0.100 | |||||
Yes | 612 | (90) | 163 | (86) | ||
No | 65 | (10) | 26 | (14) |