After IPTW, the demographics, comorbidities, and medications at baseline were well balanced except for some variables (e.g., age, BMI, diabetes, prior MI, BNP, dialysis, potassium, digoxin, amiodarone, inotropic agents, and PCI) with absolute STD values larger than 0.1 but less than 0.2 (Table 1). This evidence concerns the gene NPPB and myocardial infarction.