HbA1c was correlated with fasting blood glucose in the diabetic patients with chronic kidney disease and without chronic kidney disease, respectively, r=0.822 (p <0.001) and r=0.273 (p=0.055); Fructosamine had a correlation with fasting blood glucose in the diabetic patients with chronic kidney disease and without chronic kidney disease, respectively, r = 0.496 (p <0.001) and r = 0.534 (p <0.001).