The DM group were subdivided into a group without diabetic complications(NDC, 39 cases,17 men and 22 women)and a group with DR (16 cases,8 men and 8 women ).

• DM组分为两个亚组 :无微血管并发症 (NDC)组 39例 (男 17例 ,女 2 2例 ) ,糖尿病视网膜病变 (DR)组16例 (男 8例 ,女 8例 )。