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Variable assignment table
| Variables | Assignment |
|---|---|
| Tumor staging | 0 = I-II, 1 = III-IV |
| Lymph node metastasis | 0 = No, 1 = Yes |
| ECOG-PS score | Continuous variable |
| ALP | Continuous variable |
| SII index | Continuous variable |
Note: ECOG-PS: Eastern Cancer Collaboration Group Performance Status; ALP: Alkaline phosphatase; SII: systemic immune inflammation index.
