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Kaplan–Meier curves on prognostic factors with influence on overall survival. (A): T classification; (B): N classification; (C): M classification; (D): intraparotid lymph nodes (PAR), PAR− = negative PAR; PAR+ = intraparotid metastasis; (E): total number of resected cervical lymph nodes (TNOD); (F): log odds of positive cervical lymph nodes (LODDS); (G): log odds of positive intraparotid and cervical lymph nodes (LODDS-PAR); (H): TNM stage.
