Results showed that the plasma MEF2A level in the <70y-Con subgroup (1.31 ± 0.69 ng/ml) was significantly higher than that in the ≥70y-Con subgroup (0.98 ± 0.40 ng/ml) (z = -2.104, P = 0.035) and in the <70y-CAD subgroup (0.85 ± 0.37 ng/ml) (z = -3.816, P < 0.001), but no significant difference was observed in the plasma MEF2A level between the <70y-CAD and ≥70y-CAD subgroups (Table 2, Figure 6E). This evidence concerns the gene MEF2A and coronary artery disorder.