Xuxi Zhang

Figure 2 Forest plots for subgroup analysis on reducing the risk of developing diabetic retinopathy Results of subgroup analyses on the effectiveness of different follow ‐ up intervals are presented in Figure 2, Part B. There was substantial heterogeneity among interventions with follow ‐ up <2 years ( I 2 = 53.8%). Interventions with follow ‐ up <2 years had no significant effect 7 169 Prevention and control of diabetic retinopathy