Characteristics | Number of patients, or median (range) | Percentage of the study population |
---|---|---|
Age, years | ||
 median (range) | 53.7 (21.8–90.9) | NA |
Size of tumor | ||
 T1 | 4042 | 46 |
 T2 | 3416 | 39 |
 T3–T4 | 1074 | 12 |
 missing data | 171 | 2 |
Nodal status | ||
 N0 | 4593 | 53 |
 N1 | 3052 | 35 |
 N2 | 575 | 7 |
 N3 | 219 | 3 |
 missing data | 264 | 3 |
SBR grade | ||
 I | 689 | 8 |
 II | 4034 | 46 |
 III | 3730 | 43 |
 missing data | 250 | 3 |
Inflammatory breast cancer | ||
 yes | 317 | 4 |
 no | 8201 | 94 |
 missing data | 185 | 2 |
Laterality | ||
 right | 4197 | 48 |
 left | 4347 | 50 |
 bilateral | 76 | 1 |
 missing data | 83 | 1 |
Estrogen receptor status | ||
 negative | 2468 | 28 |
 positive | 6191 | 71 |
 missing data | 44 | 0.5 |
Progesterone receptor status | ||
 negative | 3717 | 43 |
 positive | 4908 | 56 |
 missing data | 78 | 1 |
HER2 status | ||
 negative | 5504 | 63 |
 positive | 3199 | 37 |
Breast cancer subtypes | ||
 triple-negative breast cancer | 1115 | 13 |
 luminal breast cancer | 4355 | 50 |
 HER2-positive breast cancer | 3199 | 37 |
 missing data | 34 | 0.4 |
Outcomes | ||
 recurrences | 1025 | 12 |
 deaths | 423 | 5 |
- related to breast cancer | 359 | 4 |
- unrelated to breast cancer | 64 | 0.7 |