BMI, body mass index; DM, diabetes mellitus; DLP, dyslipidemia; HTN, hypertension; IHD, ischemic heart disease; UA, unavailable; NA, not applicable. Qualitative results are shown as percentages. Quantitative results are shown as mean + standard deviation. *P-value compares people with diabetes with DR to people with diabetes without DR and healthy controls. Clinical characteristics of subjects in the three groups (diabetic patients, with or without diabetic retinopathy, and controls). Gender distribution was shown in counts. The average + standard deviation was calculated for other parameters, including age, BMI, HbA1C, and duration of diabetes mellitus. The percentages of subjects with hypertension, ischemic heart disease, and dyslipidemia were calculated. A P-value of less than 0.05 was considered statistically significant.