Fig. 1

Identification of the key FRGs: The 58 differentially-expressed FRGs (37 downregulated and 21 upregulated) were identified (A, B); Forest plots depicting the outcomes of univariate Cox regression analysis regarding gene expression and OS were presented (C); The PPI network, sourced from the STRING database, illustrated the interactions among the candidate genes (D); The correlation network of the candidate genes was analyzed and the results were presented (E).