SOD1 and diabetic retinopathy: Correlation analyses between 8-iso-PGF2α, SOD, and clinical characteristics in individuals with LADA are shown in Table 2; systolic blood pressure, HbA1c, diabetic nephropathy, duration of diabetes, diabetic retinopathy, and diabetic ketosis were related to 8-iso-PGF2α; and HbA1c, diabetic nephropathy, duration of diabetes, diabetic retinopathy, and ketosis were related to SOD.