Summary
Background: Previous researches have implicated a vital association between gut microbiota (GM) and diabetic retinopathy (DR) based on the association of the "gut-retina" axis. But their causal relationship has not been elucidated. Methods: Instrumental variables of 211 GM taxa were obtained from genome wide association study (GWAS), and Mendelian randomization study was carried out to estimate their effects on DR risk from FinnGen GWAS (14,584 DR cases and 202,082 controls). Inverse variance weighted (IVW) is the main method to analyze causality, and MR results are verified by several sensitive analyses. Results: >0.05) analysis confirmed the robustness of MR results. Conclusion: We confirmed that there was a potential causal relationship between some GM taxa and DR, which highlights the
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