Box plots and ROC analysis. Box plots of LVGFI according to the occurrence of the secondary endpoints (mortality, new congestive heart failure and non-fatal myocardial re-infarction). Corresponding ROC curves for the predictive value of LVGFI for the secondary endpoints (mortality: AUC = 0.80, CI 0.67–0.93; new congestive heart failure: AUC = 0.85, CI 0.76–0.94); Non-fatal myocardial re-infarction: AUC = 0.64, CI 0.43–0.85). LVGFI, left ventricular global function index; ROC, receiver operating characteristic; AUC, area under the curve.