NPPB and cardiovascular disorder: In the cardiovascular disease subgroup, the AUCs for the levels of FT3, NT-proBNP and CRP and the APACHE II score in the prediction of ICU mortality were 0.813 ± 0.038, 0.80 ± 0.036, 0.712 ± 0.050 and 0.816 ± 0.038, respectively (all P < 0.001) (Figure 1B).