Area under receiver operating characteristic (ROC) curves for the new risk score (0.85), integer risk score (0.80), APACHE II (0.68), total SOFA (0.69), and Cleveland Clinic score (0.65). APACHE, Acute Physiology and Chronic Health Evaluation; SOFA, Sequential Organ Failure Assessment. Green, risk model; black, integer risk score; red, SOFA score; yellow, APACHE II score; blue: Cleveland Clinic score.