The univariate logistic regression analysis showed that age (OR = 1.0, 95% CI: 0.6–0.7, p = 0.003), RDW-CV (OR = 1.6, 95% CI: 0.6–0.7, p = 0.003), Hb (OR = 0.7, 95% CI: 0.5–0.7, p = 0.005), TP (OR = 0.4, 95% CI: 0.6–0.8, p < 0.001), Alb (OR = 0.3, 95% CI: 0.6–0.7, p = 0.001), UA (OR = 0.8, 95% CI: 0.5–0.7, p = 0.002), and UN (OR = 0.9, 95% CI: 0.5–0.7, p = 0.007) were significantly associated with CAD in patients with KD. Here, GSTM1 is linked to coronary artery disorder.