Fig. 7

Tissue validation of candidate genes. A-F Expression level of candidate hub genes expression in gastric cancer tissue by qRT-PCR. Student's t test, *, p < 0.05, **, p < 0.01, ***, p < 0.001, ****, p < 0.0001, ns, not significant. G-L ROC curve of six genes signature used to determine GCPM. AUC, area under curve, Sen, sensitivity at the optimal cut-off value, Spe, specificity at the optimal cut-off value. M-R Kaplan-Meier analysis of the OS for the gene-high-expressed group and gene-low-expressed group using log-rank test