| Immunohistochemistry | ≤ 40 years | > 40 years | OR (95% CI) | p |
| N = 89; n(%) | N = 107; n(%) | |||
| Histological type |
|
|
|
|
| Invasive ductal carcinoma | 86 (96.6) | 101 (94.4) | 1.70 (0.41 - 7.01) | 0.348 |
| Others | 3 (3.3) | 6 (3.6) | 0.58 (0.124 - 2.44) | 0.5124 |
| Differentiation grade |
|
|
|
|
| SBR unknown | 4 (4.5) | 6 (5.6) | 0.79 (0.21 - 2.90) | 0.493 |
| SBR 1 | 11 (12.4) | 16 (15.0) | 0.80 (0.35 - 1.83) | 0.378 |
| SBR 2 | 39 (43.8) | 61 (57.0) | 0.58 (0.33 - 1.03) | 0.045 |
| SBR 3 | 35 (39.3) | 24 (22.4) | 2.24 (1.20 - 4.17) | 0.008 |
| Hormone receptors |
|
|
|
|
| Positive | 34 (38.2) | 58 (54.2) | 0.542 (0.29 - 0.92) | 0.018 |
| Negative | 55 (61.8) | 49(45.8) | 1.91(1.08 - 3.39) |
|
| Her 2 |
|
|
|
|
| Positive | 35 (39.32) | 27 (25.23) | 1.92(1.04 - 3.53) | 0.025 |
| Negative | 54 (60.67) | 80 (74.76) |
|
|
| Ki67 |
|
|
|
|
| Significant | 27 (30.3) | 3 (2.8) | 15.09 (4.39 - 51.83) | < 0.001 |
| Low | 62 (69.7) | 104 (97.2) |
|
|
| Molecular types |
|
|
|
|
| Luminal A | 18 (20.2) | 34 (31.8) | 0.54 (0.28 - 1.05) | 0.048 |
| Luminal B | 12(13.48) | 23 (21.5) | 0.56 (0.26 - 1.22) | 0.101 |
| Non-luminal | 16 (17.97) | 11 (10.3) | 1.91 (0.83 - 4.36) | 0.08 |
| Triple negative | 43 (48.3) | 39 (36.4) | 1.63 (0.91 - 2.88) | 0.063 |