Kaplan–Meier plots for REV7/MAD2L2 mRNA level separation from TCGA and HPA cohorts in pancreatic cancer (A), ovarian cancer (B), and breast cancer (C). The log-rank p values are shown in the lower left corner of each Kaplan–Meier plot. The prognosis of each group of patients was examined by Kaplan-Meier survival estimators, and the survival outcomes of the two groups were compared by log-rank tests. To choose the best fragments per kilobase of exon per million (FPKM) cut-offs for grouping the most significant patients, all FPKM values from the 20th to 80th percentiles were used to group the patients, significant differences in the survival outcomes of the groups were examined, and the value yielding the lowest log-rank p value selected. Genes with log-rank p values less than 0.001 were defined as prognostic genes.