Table 4: Discrimination analyses for risk scores at predicting outcomes. Area under the curve (95% confidence interval).

EuroSCORE EuroSCORE II STS
Operative mortality 0.615 (0.378-0.852) 0.535 (0.319-0.752) 0.554 (0.313-0.795)
Mortality during follow-up 0.574 (0.455-0.692) 0.575 (0.455-0.695) 0.570 (0.449-0.691)
Composite morbidity 0.591 (0.461-0.722) 0.606 (0.478-0.735) 0.649 (0.530-0.769)
 Stroke 0.591 (0.489-0.693) 0.722 (0.632-0.812) 0.742 (0.641-0.843)
 Renal failure 0.742 (0.576-0.909) 0.606 (0.509-0.703) 0.566 (0.410-0.722)
 Ventilation>24 hours 0.598 (0.454-0.743) 0.612 (0.472-0.752) 0.633 (0.495-0.722)
 Mediastinitis 0.717 (0.598-0.837) 0.818 (0.742-0.894) 0.687 (0.512-0.862)
 Return to theatre 0.484 (0.275-0.693) 0.494 (0.285-0.703) 0.543 (0.379-0.707)