LEP and chronic kidney disease: DHEA-S negatively correlated with total cholesterol (in the CKD group r = −0.374, p = 0.042), BMI (in the HD group r = −0.373, p = 0.046), and leptin (in the PD group r = −0.556, p = 0.020 and in the HD group r = −0.444, p = 0.014).