To eliminate the heterogeneity from the mixture of RR and HRs, a sensitivity analysis including the two studies (21, 25) reporting event and total numbers was performed, which also found no significant association between FGF21 and the rate of CV death among patients with CAD (RR: 1.01, 95% CI: 0.99–1.02, P > 0.05, I2 = 0%, fixed-effect model; Figure 3D). Here, FGF21 is linked to coronary artery disorder.