Comparison Of 3 Different Risk Stratification Models Underwent Coronary Artery Bypass Graft

Objective:To assess the prognostic accuracy for operative mortality of 3 different risk stratification models in the second affilicated hospital of Kunming medical college patients underwent(coronary artery bypass graft)CABG.Methods: Between 2000 and 2008,all patients undergoing CABG in our institution were prospectively scored for operative mortality using EuroSCORE,ACC/AHA and Northern New England scoring systems and operative mortality was registered Operative mortality is defined as postoperative death of any cause during hospitalization,Calibration was estimated using the Hosmer-Lemeshow goodness-of-fit test.Results:Follow-up was able to be completed in 75 prospectively scored patients.Registered operative mortality was 10.67%(8/75).The overall expected mortality calculated by EuroSCORE,ACC/AHA and Northern New England scoring systems were 7.59%,1.35%and 1.95%,respectively.The actual operative mortality was within the range of 95%confidence interval of EuroSCORE model and the other 2 predicted significantly lower operative mortality.Among the three risk scores,Calibration was good in EuroSCORE model(χ~2=5.01,P=0.085) and poor in other 2 models.(P＜0.001).Conclusion:For the second affilicated hospital of Kunming medical college patients undergoing CABG,EuroSCORE scoring system best predicted the operative mortality.the system could be used to discriminate operative mortality for individual patient.