Validation of New York Operative Mortality Risk Score for Valve and Valve/Coronary Artery Bypass Grafting Operations

The NY logistic and score models for valve operations fit the PH&S-SHS data well with acceptable discrimination and good calibration. The NY models for valve/CABG operations fit the PH&S-SHS data with acceptable discrimination and poor calibration. STS logistic regression models fit the PH&S-SHS data somewhat better.