| TCR | Taiwan Cancer Registry |
| NHI | National Health Insurance |
| CCI | Charlson Comorbidity Index |
| TNM | tumor-node-metastasis |
| LN | lymph node |
| OS | overall survival |
| DFS | disease-free survival |
| HR | hazard ratio |
| CI | Confidence Interval |
| aHR | adjusted hazard ratio |
| NCDB | National Cancer Database |
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