A meta analysis of the prevalence rate of diabetic retinopathy

Review question / Objective: P: diabetic retinopathy; I:—; C:—; O: prevalecne rate; S:cross-sectional study. Objective:To analyze the epidemiological characteristics of diabetic retinopathy and to provide scientific basis for its prevention and control． Condition being studied: Diabetic retinopathy is one of the common microvascular complications in patients with diabetes mellitus, which ultimately seriously affects the vision of patients. It is the leading cause of blindness among young and middle-aged workers worldwide. It is one of the main causes of binocular blindness in elderly patients in western countries.Because of the high incidence, wide range, complex pathogenesis, serious consequences and poor treatment effect of DM and its DR,many countries have actively carried out epidemiological research on the population of DM patients in order to understand the incidence, distribution and related risk factors of DR, and to provide scientific basis for the formulation of targeted public prevention and control measures.