Fig. 2. Power of different methods under various simulation scenarios.
Power (y axis) at a false discovery rate of 0.1 to detect the causal effect a–d or the horizontal pleiotropic effect e, f is plotted against different causal effect size characterized by PVEzy (x axis). Compared methods include CoMM (turquoise), PMR-Egger (magenta), TWAS (blue), LDA MR-Egger (black), SMR (orange), and PrediXcan (purple). Simulations are performed under different horizontal pleiotropic effect sizes: a γ = 0; b γ = 0.0001; c, e γ = 0.0005; d, f γ = 0.001.