GSTM1 and diabetic retinopathy: After analysis of the baseline characteristics of the patients, variables with statistical differences between the NIAD and INS groups included sex (p < 0.01), age (p < 0.01), diabetic peripheral vascular disease (p < 0.01), diabetic retinopathy (p = 0.02), fatty liver (p = 0.03), drinking history (p < 0.01), initial blood glucose (p = 0.01), BMI (p < 0.01), Hb (p = 0.03), GGT (p = 0.02) , LOS (p < 0.01) (Table 1).