The receiver operating characteristic (ROC) curve analysis showed that the ApoB/ApoA1 ratio had a moderate level of predictive accuracy for Type I CRS, with an area under the curve (AUC) of 0.782.<h4>Conclusion</h4>The ApoB/ApoA1 ratio is moderately associated with the risk of developing Type I CRS in patients with CAD. The gene discussed is APOA1; the disease is coronary artery disorder.