Introduction/Objective The Risk factors in coronary patients indicated for
surgery change during the years. The aim of this study was to analyze the
trends of risk factors which enter into the composition of the European
System for Cardiac Operative Risk Evaluation (EuroSCORE II). Methods The
research included 3996 patients who underwent coronary surgery from January
2012 to December 2020 at our clinic. For estimation of the risk factors and
evaluation of the operative risk, the EuroSCORE II model was used.
Kruskal-Wallis H test was used for testing differences of values of
numerical variables between years. The calibration and the discriminative
power of the EuroSCORE II were assesed by comparing the observed to the
expected mortality ratio and by using area under the receiver operating
characteristic curve (AUC). Results The old age has shown a significant
increasing trend (p < 0.0005), as well as diabetes mellitus on insulin
therapy, before surgery (p = 0.004). The significant declining trend have
shown: extracardiac arteriopathy (p = 0.003), critical preoperative
condition (p = 0.013), preoperative NYHA Classes III or IV (p < 0.0005) and
preoperative angina pectoris CCS Class IV (p < 0.0005). The mean value of
the EuroSCORE II decreased from 1.73 to 1.53 (p < 0.0005). The observed
mortality was 1.70% and the mean, predicted by the EuroSCORE II, was 1.75%.
The O/E mortality ratio was 0.98; 95% confidence interval 0.95-1.03. The AUC
was 0.825. Conclusion Over the past decade the risk profile of patients for
coronary surgery has changed. The mean value of the EuroSCORE II has
declining trend with a good predictive and discriminative power.