MMP9 and coronary artery disorder: In addition to this, input features such as pro-brain natriuretic peptide (NT-proBNP), matrix metalloproteinase-2 and 9 (MMP-2, MMP-9), leptin, low-density lipoprotein (LDL), and patient characteristics such as weight, age, and height are highly ranked as significant features for the prognosis of coronary artery disease (CAD).