| CCI | Charlson Comorbidity Index |
| ER | Estrogen Receptor |
| PR | Progesterone Receptor |
| HER2 | Human Epidermal Growth Factor Receptor 2 |
| HR | Hazard Ratio |
| sHR | Subdistribution Hazard Ratio |
| CI | Confidence Interval |
| OS | Overall Survival |
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