CRP and Sepsis: In the sepsis group, the AUCs for the levels of FT3, NT-proBNP and CRP and the APACHE II score to predict ICU mortality were 0.633 ± 0.055, 0.666 ± 0.054, 0.627 ± 0.056 and 0.755 ± 0.045, respectively (all P < 0.05) (Figure 1C).