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. 2023 Apr 21;17:1146613. doi: 10.3389/fnins.2023.1146613

Figure 2.

Figure 2

Three significant assumptions of depression on metabolites via reverse MR. The three paths represent these three different assumptions. Relevance assumption: SNPs are associated with depression (the exposure). Independence assumption: SNPs are completely independent of any potential confounding factors that influence depression and metabolites. Exclusivity assumption: SNPs affect metabolites only through depression (exposure) and not via any alternative causal pathways.