Figure 8. External validation of the IRRS model in predicting OS of GC patients based on three independent cohorts. (A) The distribution of the risk score, the vital status of patients, and the expression heatmap of three prognostic variables in the GSE15459 cohort. (B) The distribution of the risk score, the vital status of patients, and the expression heatmap of three prognostic variables in the GSE84437 cohort. (C) The distribution of the risk score, the vital status of patients, and the expression heatmap of three prognostic variables in the GSE62254 cohort. (D) The Kaplan–Meier survival analysis of the IRRS signature for predicting the OS of patients in the GSE15459 cohort. (E) The Kaplan–Meier survival analysis of the IRRS signature for predicting the OS of patients in the GSE84437 cohort. (F) The Kaplan–Meier survival analysis of the IRRS signature for predicting the OS of patients in the GSE62254 cohort.