FGF23 and diabetes mellitus: ROC curves were generated using the conventional risk factors for all-cause mortality (age, sex, smoking, presence of diabetes mellitus, duration of dialysis, CACS, serum albumin, CRP, log intact FGF23, ERI, and the dose of calcium carbonate) + TSAT, the conventional risk factors for all-cause mortality + Fe, or the conventional risk factors for all-cause mortality + ferritin, for the prediction of 5-year all-cause mortality (n = 173) (Supplementary Figure 2).