To test the hypothesis that age of type 2 diabetes onset influences inherent susceptibility to diabetic retinopathy, independent of disease duration and degree of hyperglycemia.

Wong J., Molyneaux L., Constantino M., Twigg S.M., Yue D.K. Timing is everything: age of onset influences long-term retinopathy risk in type 2 diabetes, independent of traditional risk factors. Diabetes Care. 2008;31(10):1985-90.
doi: 10.2337/dc08-0580.