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The prevalence of any diabetic retinopathy (DR) by diabetes mellitus (DM) duration group, using random-effects meta-analysis. The numbers of individual studies contributing to the synthesis of prevalence in each DM duration group are 13 (for newly diagnosed), 7 (for 1-4 years), 8 (for 5-9 years) and 9 (for ≥10 years) respectively.
