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Assignment description.
| Factor | Variable | Assignment description |
|---|---|---|
| Central neck lymph node metastasis | Y | 0: no central neck lymph node metastasis; 1: central neck lymph node metastasis |
| Gender | X 1 | 0: female; 1: male |
| BRAF V600E mutation | X 2 | 0: negative; 1: positive |
| Extracapsular invasion | X 3 | 0: no; 1: yes |
