Diabetic 3 month average glucose may have (A1c) shows additional value.

HbA1c Value Above 8% May Increase Risk For Sight-Threatening Retinopathy In Diabetes.
MedWire (2/9, Albert) reported that, according to a study published online Feb. 8 in the journal Diabetes Research and Clinical Practice, “having a glycated hemoglobin (HbA1c) value above 8.0% significantly increases the risk for sight-threatening retinopathy (STDR) in patients with diabetes.” After evaluating “the HbA1c level and retinopathy status of 1,414 individuals with diabetes,” 255 of whom had retinopathy, researchers “found that a cut-off value of 8.0% for HbA1c was most predictive for both non-STDR and STDR.”