With regard to the inflammatory cytokines, elevated serum YKL-40 level was linked with increased TNF-α (P = 0.001) (Figure 4A), IL-1β (P = 0.001) (Figure 4B), IL-6 (P < 0.001) (Figure 4C), and IL-17A (P = 0.002) (Figure 4D) in CHD patients. This evidence concerns the gene IL6 and coronary artery disorder.