Figure 4. GSE21257 data was used as a validation group to verify the effectiveness of the risk scoring model in predicting survival. (A) Kaplan-Meier survival analysis; (B) Scatter chart: green represents survival during follow-up, red represents death during follow-up, abscissa represents risk score, and ordinate represents survival time. (C) Risk curve. (D) Heat map of gene expression in 53 patients with osteosarcoma. (E) Time ROC graph. (F) PCA dimensionality reduction analysis chart.