NPPB and diabetes mellitus: In each age subgroup (age < 75 years or age ≥ 75 years), female or male subgroup, obese or non-obese subgroup (BMI < 25 kg/m2 or BMI ≥ 25 kg/m2), diabetes or no diabetes subgroup, increased NT-proBNP level was associated with a higher risk of MACE.