Clinical data within 24 h of enrollment were collected, including age, gender, comorbidities (diabetes, hypertension, hepatic insufficiency), C-reactive protein (CRP), procalcitonin (PCT), D-dimer, white blood cell count (WBC), Sequential Organ Failure Assessment (SOFA) score, Oxygenation Index (OI), Albumin (ALB), Creatinine (Cr), and Blood Urea Nitrogen (BUN). Here, CRP is linked to diabetes mellitus.