Fig. 2

Individual estimates about the causal effect of plasma vitamin C levels on PD AAO using MR-Egger method. The x-axis shows the single nucleotide polymorphism (SNP) effect, and standard error, on plasma vitamin C levels for each of the 11 SNPs, and the y-axis shows the SNP effect, and standard error on PD AAO. The regression line for the MR-Egger method is shown