Fig. 4

Internal and external validation of the prognostic immune gene signature in the TCGA and ICGC cohorts, respectively. Kaplan–Meier survival curves of OC patients in different risk groups in the TCGA cohort (A) and ICGC cohorts (F). AUC value and ROC curves of risk score and clinicopathologic characteristics predicting 5-year survival of OC patients in the TCGA cohort (B) and ICGC cohorts (G). The distribution of the risk score (C), survival time and life status (D), and the expression profiles of the five prognostic IRG that formed the risk model (E) in 374 OC patients from the TCGA cohort. H Distribution of 93 OC patients’ risk score in the ICGC cohort. I Relationship between risk score, survival time and life status in the ICGC cohort. J The expression of 5 risk genes in the ICGC cohort