The ROC curve for separate components of each step (physiologic criteria, anatomic criteria, mechanism-of-injury criteria, and special considerations). The AUC values for the separate components of each step (physiologic criteria, anatomic criteria, mechanism-of-injury criteria, and special considerations) were 0.722, 0.648, 0.647, and 0.456, respectively. ROC: receiver operating characteristic, AUC: area under the curve.