TTR and chronic kidney disease: There were no significant differences in gender, prealbumin, free thyroxine, thyroid-stimulating hormone, complement C4, total cholesterol, low-density lipoprotein, high-density lipoprotein, glycosylated hemoglobin, immunoglobulin A, immunoglobulin M, immunoglobulin G, and CRP among non-CKD patients and CKD3 to CKD5 patients (p > 0.05).