BDNF and chronic kidney disease: In the non-CKD group, BDNF showed a significant positive correlation with triglycerides (rho = 0.175, P < 0.001), total cholesterol (rho = 0.164, P = 0.001), and LDL cholesterol (rho = 0.104, P = 0.040) and an inverse correlation with age (rho = -0.186, P < 0.001) and VCAM-1 (rho = -0.123, P = 0.014).