Based on the data, the important variables associated with the occurrence of NOAF were selected: age, CAD, heart failure, WBC, neutrophils, neutrophil percentage, CRP, PCT, TNF-α, MPO, HOCl, CR, TNI, NT-proBNP, LDL-c, SOFA score, APACHE II score, LVEF, and LVFS. The gene discussed is MPO; the disease is coronary artery disorder.