The ROC analysis revealed that the AUCs for s-CSF2-Ab were 0.644, 0.683, and 0.593 (Figures 4C–E), and the AUCs for s-CSF2pep-Ab were 0.657, 0.669, and 0.631 (Figures 4F–H) in patients with CKD types 1, 2, and 3, respectively. The gene discussed is CSF2; the disease is chronic kidney disease.