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| Clinical data | Cases | Controls |
| Age (Mean±SD) a | 48.9±10.4 | 45.2±8.9 |
| rade (%) | ||
| I,II | 59(79.7) | _ |
| III | 15(20.3) | |
| ER (%) | ||
| Negative | 28(26.9) | _ |
| Positive | 76(73.1) | |
| PR (%) | ||
| Negative | 37(35.9) | _ |
| Positive | 66(64.1) |
The Student's t test showed no significant difference between the two groups (p>0.05).
