CRP and chronic obstructive pulmonary disease: There were significant differences in chronic obstructive pulmonary disease (COPD) (P = 0.003), chronic renal dysfunction (CRD) (P = 0.046), MBP (P < 0.001), respiratory rate (P < 0.001), heart rate (P < 0.001), PaO2 (P < 0.001), Lac (P < 0.001), PCT (P < 0.001), WBC (P < 0.001), PaO2/FiO2 (P < 0.001), CRP (P = 0.037), qSOFA score (P < 0.001), SOFA score (P < 0.001) and CURB-65 score (P < 0.001) between ICU and non-ICU admission groups (Table 1).