**Figure 1.** **Construction of the risk score model based on prognostic pseudogenes.** (**A**) The hazard ratios (HR), 95% confidence intervals (CI) calculated by univariate Cox proportional hazard regression of 15 prognostic pseudogenes using TCGA data. (**B**) LASSO coefficient profiles of 15 prognostic pseudogenes. (**C**) Ten-time cross-validation for tuning parameter selection in the LASSO model of 15 prognostic pseudogenes. (**D**) The breast cancer patients from TCGA dataset in high-risk group displayed significantly shorter overall survival than those in low-risk group (p = 0.0025). (**E**) The breast cancer patients from EGA dataset in high-risk group displayed significantly shorter overall survival than those in low-risk group (p = 0.0313). (**F**) The ROC curve and AUC for the risk score model in TCGA dataset. (**G**) The ROC curve and AUC for the risk score model in EGA dataset.