Our analysis revealed that those in the dead group tended to exhibit characteristics of malnutrition, as they were generally older and had significantly lower height, LDL-C, weight, TG, GNRI, BMI, eGFR, TC, Hb, and ALB levels and had higher CRP levels and proportion of smokers, while there were also no significant differences in sex composition, proportion of complex PCI procedures, history of stroke, proportion of diabetic patients, HDL-C, HbA1c, SBP, DBP, LVEF levels, and types of coronary lesion. This evidence concerns the gene GSTM1 and malnutrition.