Table 1

Clinical and laboratory characteristics of the patients with ARDS

CharacteristicARDS
Total no.50
Sex (no. male/no. female)39/11
Age (years), median (IQR)69.5 (52.8–77.0)
Clinical variables
 Cause of disease, n (%)
  Bacterial pneumonia31/50 (62)
  Viral pneumonia3/50 (6)
  Non-pulmonary sepsis6/50 (24)
  Aspiration7/50 (14)
  Others*3/50 (6)
 Disease severity, n (%)
  Mild2/50 (4)
  Moderate31/50 (62)
  Severe17/50 (34)
 Mortality, n (%)25/50 (50)
  Mild0/2 (0)
  Moderate12/31 (38.7)
  Severe13/17 (76.5)
 PEEP (cmH2O), median (IQR)12.0 (10.0–13.0)
 Plateau pressure (cmH2O), median (IQR)28.0 (24.5–31.5)
 ECMO (%)9/50 (18)
Laboratory variables, median (IQR)
 Leucocyte count (cells/μL)12 300 (7900–15 225)
 Lymphocyte count (cells/μL)620 (402.5–1073)
 Monocyte count (cells/μL)485 (205.0–927.5)
 Neutrophil count (cells/μL)10 110 (6163–13 813)
 Haemoglobin level (g/dL)9.8 (8.7–11.0)
 Platelet count (×103 cells/µL)173.0 (86.8–242.3)
 PaCO2 (mm Hg)42.0 (36.0–48.0)
 PaO2 (mm Hg)77.5 (65.6–86.7)
 FiO2 (mm Hg)0.6 (0.55–0.80)
 PaO2/FiO2 ratio119.0 (83.8–141.0)
 Total protein level (g/dL)5.5 (4.8–6.1)
 Albumin (g/dL)2.6 (2.3–2.9)
 AST (U/L)42.0 (22.0–78.0)
 ALT (U/L)23.0 (13.5–60.5)
 BUN (mg/dL)29.8 (20.9–50.4)
 Creatinine (mg/dL)1.0 (0.7–1.69)
 CRP level (mg/dL)17.2 (9.1–27.2)
  • *included trauma, pancreatitis, and hepatitis.

  • ALT, alanine transaminase; ARDS, acute respiratory distress syndrome; AST, aspartate transaminase; BUN, blood urea nitrogen; CRP, C reactive protein; ECMO, extracorporeal membrane oxygenation; FiO2, fraction of inspired oxygen; PaCO2, partial pressure of arterial carbon dioxide; PaO2, partial pressure of arterial oxygen; PaO2/FiO2, ratio of the partial pressure of arterial oxygen to the fraction of inspired oxygen; PEEP, positive end expiratory pressure.