Figure 3. Identification of genomic variant genes and prognosis-related genes in head and neck cancer. (A) Relationship between the error rate and number of classification trees. (B) Importance the sequencing of 6 out-of-bag genes. (C) Distribution of the 6-gene signature in Kaplan-Meier survival curve for the TCGA training set. (D) ROC curve and AUC for the 6-gene signature classification. (E) TCGA training focused on risk score, survival time, survival status, and expression of the 6-gene signature.