EFNA1 and diabetes mellitus: Plasma ephrin-A1 was correlated with the duration of diabetes (r = 0.513,P < 0.05) and with Serum creatinine (r = 0.338,P < 0.05), but was not correlated with age, BMI, serum VEGF165, total cholesterol, fasting blood glucose and HbA1c in the DR patients, the DM subjects, and the non-DM subjects or all subjects.