When comparing different variables among different types of CAD patients, the results showed that age, the proportion of male and patients with hypertension or diabetes, TC, LDL-C, HCY, and cystatin C were significantly higher in the acute myocardial infarction (AMI) group than in stable angina pectoris (SAP) group (all P < .05). This evidence concerns the gene CST3 and myocardial infarction.