Figure 1

Calibration plot, comparison between observed mortality and mortality predicted by EuroScore 2. Differences between observed and predicted values are significant (Hosmer–Lemeshow test: χ² = 49.94, p < 0.0001). i.e. for patients having a theoretical risk of 5%, observed mortality was 18% and for those predicted at 11%, had 30%; conversely, for patients predicted at 2%, observed mortality was null.