Fig. 3

ROCs of different logistic models to predict 28-day mortality. ROCs of different logistic models in 938 population were presented in (a), ROCs of different logistic models in 204 population with at least 4 records of ROX were presented in (b). Model 1 adjusted age, sex, SOFA, APS-III, vasopressin, ventilation, WBCs, BUN, creatinine, and RR; model 2 adjusted variables in model 1 plus trajectories of RR and HR; model 3 adjusted variables in model 1 plus last measurement of ROX. ROC receiver operating curve, SOFA Sequential Organ Failure Assessment, APS-III Acute Physiology Score III; WBCs white blood cells, BUN blood urea nitrogen, RR respiratory rate, HR heart rate, ROX respiratory rate-oxygenation. †P = 0.020, ‡P = 0.015