Figure 3. Cumulative incidence over 8 years of further progression of retinopathy in the former DCCT conventional-therapy and intensive-therapy groups.. Adapted from: The Diabetes Control and Complications Trial/Epidemiology of Diabetes Interventions and Complications Research Group. Effect of intensive therapy on the microvascular complications of type 1 diabetes mellitus. JAMA 2002; 287: 2563-2569.