FGF23 and Mental deterioration: The best cutoff values for serum α-klotho, FGF-23, IL-6, TNF-α, BDNF, BMI, and calcium levels for the diagnosis of dialysis-induced cognitive decline were 469.5 pg/mL, 1,264.5 ng/mL, 1.8 pg/mL, 21.1 pg/mL, 20.0 ng/mL, 23.9 kg/m2, and 2.52 mmol/L, respectively.