CAD obstructive coronary artery disease, CCA conventional coronary angiography, SD standard deviation aBody Mass Index, defined as weight/height2 (in kg/m2) bPast or current cSerum cholesterol >200 mg/dL or 5.18 mmol/L dPlasma glucose ≥126 mg/dL or 7.0 mmol eMeasured according to Agatston [15] fDefined as ≥50% stenosis in at least one vessel