Fig. 2: Establishment of a tumor immune-related prognostic signature (TIR signature) for melanoma.

a Cox proportional hazard regression model was used to construct a prognostic signature consisting of four genes (SEL1L3, HAPLN3, BST2, and IFITM1). The coefficient (β), P value, and hazard ratio of each gene were calculated by the model. b Kaplan–Meier curves of the overall survival of patients with high TIR risk scores and those with low TIR risk scores. Statistical significance was determined by the log-rank test. c All TCGA SKCM patients were ranked from the lowest to the highest TIR risk score. d The overall survival time and survival status of individual patients. The black dotted line represents the median TIR risk score that divides patients into low-risk and high-risk groups. e Heatmap of SEL1L3, HAPLN3, BST2, and IFITM1 expression levels. Rows represent genes and columns represent patients.