ABSTRACT

To compare the feasibility of the EuroScore and STS (The Society of Thoracic Surgeons) risk scoring systems for predicting the surgical mortality of isolated coronary artery bypass surgery patients.

The risk scoring of 148 patients who were operated on between November 2002 and December 2005 was performed prospectively according to the EuroScore and STS risk scoring systems. The predicted and observed mortality rates according to each scoring system were compared.

Hospital mortality was 2% (3 patients). The predicted mortality rate according to EuroScore was 3.4±2.2%, whereas it was 3.0±2.1% for STS. There were no significant differences between predicted and observed mortality rates according to either scoring system. The area under the receiver operating characteristic curve was 0.83 for EuroScore and was 0.82 for STS (p>0.05).

Both scoring systems were efficient for predicting mortality rates for our patient population. It is an advantage of STS that it also gives valuable information about morbidity.