ALB and diabetes mellitus: In the diabetic retinopathy group and non-diabetic retinopathy group, there were statistically significant differences (P<0.05) in gender, age, duration of diabetes, smoking history, non-pharmacological treatment, systolic blood pressure, fasting blood glucose, 2-hour postprandial blood glucose, glycosylated hemoglobin, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, blood urea nitrogen, and urine albumin/creatinine ratio.