IFNG and infection: For infection severity diagnosis, ROC curve analysis demonstrated that serum TNF-α, IL-6, and IFN-γ levels had diagnostic value in assessing DFI infection severity, with AUC values of 0.811(95%CI: 0.734-0.927), 0.793(95%CI: 0.705-0.857), and 0.764(95%CI: 0.699-0.839), respectively.