Table 2: Comparison of risk factors between the high and low TACS groups.

Variables	TACS ≥ the 75^thpercentile (n = 25)	TACS ≤ the 75^th percentile (n = 75)	P value
Age, years Smoker Body mass index, kg/m^2 Body surface area Diabetes mellitus Hypertension Dyslipidemia Arteriopathy Chronic kidney disease History of CHVA Preoperative use of IABP LVEF, % Left main coronary disease OPCAB Logistic Euro SCORE (%)	71.1 ± 6.8 12 (48.0) 24.3 ± 2.7 1.7 ± 0.2 16 (64.0) 23 (92.0) 9 (36.0) 7 (28.0) 4 (16.0) 8 (32.0) 2 (8.0) 52.5 ± 17.7 7 (28.0) 16 (64.0) 8.3 ± 6.2	64.5 ± 9.0 40 (53.3) 24.2 ± 3.1 1.7 ± 0.1 34 (45.3) 50 (66.7) 32 (42.7) 15 (20.0) 11 (14.7) 10 (13.3) 7 (9.3) 56.9 ± 13.8 19 (25.3) 48 (64.0) 5.0 ± 5.4	0.001 0.653 0.905 0.588 0.165 0.018 0.642 0.413 1.000 0.067 1.000 0.201 0.797 1.000 0.013

TACS: Thoracic Aortic wall Calcium Score

CVA: Cerebro Vascular Accident

IABP: Intra-Aortic Balloon Pump

LVEF: Left Ventricular Ejection Fraction

OPCAB: Off Pump Coronary Artery Bypass Grafting

Euroscore: European system for cardiac operative risk evaluation.