Table 2

Laboratory and imaging findings on admission

  Overall (N=516)  Dead (N=120)  Alive (N=396)  P value
Laboratory findings
 PaO2/FiO2, median (IQR)269 (217–319)226 (169–271)281 (232–335)<0.001
  <200, N (%)101 (19.6)42 (35.0)59 (15.0)<0.001
  ≥200, N (%)415 (80.4)78 (65.0)337 (85.1)
 Haematocrit, % median (IQR)41 (38–44)39 (35–43)42 (39–44.75)<0.001
 Haemoglobin, g/L median (IQR)130 (117–143)129 (117–141)133 (122–143)0.203
 WBC, (×109/L) median (IQR)6.31 (5–9)7.11 (5–10.23)6 (4.98–8.47)0.009
 Lymphocytes, (×109/L) median (IQR)0.90 (0.70–1.24)0.77 (0.70–1.07)0.90 (0.70–1.24)<0.001
 Lymphocytopaenia, N (%)316 (61)85 (71)231 (58)0.011
 Platelets, (×109/L) median (IQR)182 (142–234)156 (117–218)187 (152–238)0.001
 ALT, U/L median (IQR)31 (19–51)26 (16–42)32 (19–58)0.004
 AST, U/L median (IQR)46 (30–69)50 (35–71)45 (28–69)0.181
 Serum creatinine, mg/dL median (IQR)0.94 (0.79–1.22)1.23 (0.92–1.91)0.90 (0.79–1.13)<0.001
 CPK, U/L median (IQR)110 (64–228)130 (60–208)108 (64–208)0.085
 LDH, U/L median (IQR)351 (268–480)473 (338–610)335 (266–437)<0.001
 CRP, mg/L median (IQR)94 (44.3–161.8)138 (85–188)77 (37–152)<0.001
ImagingN=486N=114N=372
Chest X-ray
 Negative, N (%)20 (4.1)2 (1.8)18 (4.8)0.053
 Consolidation, N (%)67 (13.8)12 (10.5)55 (14.8)
 Interstitial, N (%)346 (71.2)81 (71.1)265 (71.2)
 Mixed, N (%)53 (10.9)19 (16.7)34 (9.1)
  • Percentages in round brackets are calculated for numbers in columns for all dichotomous variables

  • ALT, alanine aminotransferase; AST, aspartate aminotransferase; CPK, creatine phosphokinase; CRP, C reactive protein; LDH, lactate dehydrogenase; WBC, white blood cell count.