Methods: Our retrospective study included 501 consecutive patients (366 males, 135 females; mean age 63.4±19.4 years; range 44 to 83 years) who underwent coronary artery bypass graft (CABG) surgery between February 2005 and December 2006 in our clinic. The preoperative and intraoperative risk factors of the Cleveland, EuroSCORE, and CABDEAL risk stratification systems were analyzed for each patient, and the sensitivity and specificity of these three systems were compared in terms of mortality and morbidity.

Results: In terms of mortality, the sensitivity and the specificity of the Cleveland system was found to be 61.5% and 90.4%, respectively while for the EuroSCORE system, the rates were 92.3% and 82.2%, respectively. For the CABDEAL system, the sensitivity and specificity were 92.3% and 44.9%, respectively. In terms of morbidity, the sensitivity and specificity of Cleveland system were 23.5% and 89.5%, respectively, while they were 41.2% and 81%, respectively for the EuroSCORE. The sensitivity and specificity of the CABDEAL system were 82.4% and 44.8%, respectively.

Conclusion: The study results showed that the EuroSCORE system is more suitable for predicting the expected mortality rates while the CABDEAL system followed by the Cleveland system are more appropriate in for predicting the expected morbidity rates in the Turkish population with cardiac disease.