The results showed that subjects without risk of malnutrition were younger and had a higher prevalence of smokers and also had higher levels of height, weight, BMI, ALB, eGFR, TC, TG, LDL-C, SBP, DBP, Hb, LVEF and lower CRP levels than those with risk of malnutrition, but there were no significant differences in sex composition, proportion of complex PCI procedures, history of stroke, proportion of diabetic patients, HDL-C and HbA1c levels and types of coronary lesion. The gene discussed is CRP; the disease is malnutrition.