NPPB and susceptibility to pneumonia measurement: Compared with the non-survivor group, patients in the survivor group were younger, had a higher proportion of Whites and Blacks, higher levels of temperature, DBP, SBP, PO2, PCO2, pH, eGFR, and platelets, lower levels of HR, RR, SAPSS II scores, and SOFA scores, and NT-proBNP, WBC, L, N, CRP, length of ICU stay, length of hospital stay, and lower prevalences of sepsis, pneumonia, AMI, AF, and respiratory failure, as well as lower proportions of ventilation, RRT and vasoactive medication use (all P-value < 0.05).