Parameter Hazard Ratio 95% CI P
Less experienced surgeon 2.7 1.6-4.36 0.0002
Age 1.03 1.007-1.056 0.0117
Valve replacement 1.75 1.02-2.98 0.0401
Dyslipidemia 0.88 0.5-1.54 0.6588
Diabetes Mellitus 1.64 0.9-2.9 0.1089
Atrial fibrillation 1.28 0.73-2.24 0.3863
Congestive heart failure 2.01 1.07-3.76 0.0286
Chronic lung disease 2.26 1.27-4 0.0053
Hypertension 1.54 0.77-3.04 0.2171
Urgent/emergent operation 1.57 0.88-2.8 0.1291