Table 2. Comparison of biomarker expression and molecular subtypes among young vs old women.
| Women ⩽40 | Women ⩾50 | ||
|---|---|---|---|
| Variables | (%) | (%) | P -value |
| ER status | n=158 | n=99 | 0.01 |
| Positive | 79 (50.0) | 65 (65.7) | |
| Negative | 79 (50.0) | 34 (34.3) | |
| Level (%) | 33.04±41.67 | 57.87±44.65 | <0.00 |
| PR status | n=158 | n=99 | 0.07 |
| Positive | 60 (38.0) | 49 (49.5) | |
| Negative | 98 (62.0) | 50 (50.5) | |
| Level (%) | 18.43±30.49 | 27.9±37.12 | 0.03 |
| Her2 status | n=157 | n=99 | 1.00 |
| Positive | 35 (22.3) | 23 (23.2) | |
| Negative | 122 (77.7) | 76 (76.8) | |
| Amplification level (FISH) | 4.89±2.66 | 4.65±2.91 | |
| KI67 | n=149 | n=98 | 0.01 |
| High (>14%) | 126 (82.9) | 75 (76.5) | |
| Low (⩽14%) | 23 (17.1) | 23 (23.5) | |
| Level (%) | 49.58±30.96 | 40.11±29.78 | 0.01 |
| P53 | n=143 | n=98 | 0.00 |
| Normal (<10%) | 79 (55.2) | 72 (73.5) | |
| High (⩾10%) | 64 (44.8) | 26 (26.5) | |
| Level (%) | 31.34±38.76 | 17.90±32.16 | 0.00 |
| Molecular subtypes | n=157 | n=99 | 0.05 |
| Luminal A | 18 (11.4) | 20 (20.2) | |
| Luminal B | 45 (28.7) | 30 (30.3) | |
| Her2 subtype | 21 (13.4) | 8 (8.1) | |
| Luminal-Her2 | 14 (8.9) | 15 (15.2) | |
| Triple negative | 59 (37.6) | 26 (26.2) |
Abbreviation: FISH=fluorescent in situ hybridisation.