Table 1 Patient and tumor characteristics of 720 male breast cancer patients with sufficient tumor tissue available for analysis
Characteristics | No. (%) | % exclude missing |
|---|---|---|
Age at diagnosis | ||
 Median (IQR) | 67 (58–76) years |  |
ER (Allred score) | ||
 0–2 | 11 (1.5) | (1.7) |
 3–6 | 47 (6.6) | (7.3) |
 7–8 | 584 (81.1) | (91.0) |
 Missing | 78 (10.8) |  |
PR (Allred score) | ||
 0–2 | 146 (20.3) | (23.2) |
 3–6 | 252 (35.0) | (40.0) |
 7–8 | 232 (32.2) | (36.8) |
 Missing | 90 (12.5) |  |
AR (Allred score) | ||
 0–2 | 20 (2.8) | (3.1) |
 3–6 | 62 (8.7) | (9.8) |
 7–8 | 556 (77.2) | (87.1) |
 Missing | 82 (11.4) |  |
HER2 status | ||
 Negative | 597 (82.9) | (94.0) |
 Positive | 31 (4.3) | (4.9) |
 Equivocal | 7 (1.0) | (1.1) |
 Missing | 85 (11.8) |  |
Ki67 | ||
 ≤ 20% | 502 (69.7) | (79.1) |
 > 20% | 133 (18.5) | (20.9) |
 Missing | 85 (11.8) |  |
Breast cancer subtypes (2013 St. Gallen consensus) | ||
 Luminal A-like | 270 (37.5) | (43.3) |
 Luminal B-like HER2− | 311 (43.2) | (49.9) |
 Luminal B-like HER+ | 31 (4.3) | (5.0) |
 HER2+ (non-luminal) | 0 (0) | (0) |
 Triple-negative | 9 (1.3) | (1.4) |
 Not defined (ER−, PR+) | 2 (0.3) | (0.3) |
 Missing | 97 (13.5) |  |
Histological type | ||
 Invasive ductal | 628 (87.2) | (88.3) |
 Invasive lobular | 9 (1.3) | (1.3) |
 Others | 74 (10.3) | (10.4) |
 Missing | 9 (1.3) |  |
Histological grade | ||
 I | 165 (22.9) | (23.2) |
 II | 373 (51.8) | (52.5) |
 III | 172 (23.9) | (24.2) |
 Missing | 10 (1.4) |  |
Metastatic status at diagnosis | ||
 M0 | 487 (67.6) | (94.6) |
 M1 | 28 (3.9) | (5.4) |
 Mx | 205 (28.5) |  |