Fig. 2.

Sterols as predictors for a high MEAF receiver operating characteristic (ROC) analysis to verify which parameter predicts a high MEAF. The 75 % percentile of the MEAF was used as binary classifier, i.e. the 25 % of the patients with a MEAF ≥ 6.10 were compared to the others. Values for the area under the curve (AUC; 0–1), p values (<0.05–0) and the Youden-Index (0–1) are shown in heat maps. The Youden-Index, defining the maximum potential effectiveness of the parameter, was calculated from the AUC curves