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Table 2 Characteristics of 32 patients who had confirmed influenza A (H1N1)v viral primary pneumonitis

From: Intensive care adult patients with severe respiratory failure caused by Influenza A (H1N1)v in Spain

Variables Value
Age, years  
   Mean (SD) 40 (13.9)
   Median (IQR) 36 (31 to 52)
Male sex, n (%) 21 (73.3)
APACHE II score, mean (SD) 13.8 (6.4)
SOFA score, mean (SD) 7.1 (3.3)
Days from onset symptoms to ICU admission  
Mean (SD) 3.9 (2.2)
Median (IQR) 3 (2 to 6)
Days from ICU admission to diagnosis  
Mean (SD) 3.3 (3.1)
Median (IQR) 2 (1 to 6)
Days from onset symptoms to first antiviral dose  
Mean (SD) 5.7 (5.1)
Median (IQR) 4 (1 to 8)
Laboratory finding, median (IQR)  
   Leukocyte count (per mm3) 5650 (3000 to 9200)
Platelets count (per mm3) 152.000 (124.00 to 227.000)
Serum lactate dehydrogenase (U/L) 953 (728 to 1230)
Serum creatine kinase (U/L) 392 (226 to 3047)
Serum creatinine (mg/dL) 0.87 (0.63 to 1.22)
AST (U/L) 62 (38 to 119)
ALT (U/L) 51 (35 to 111)
Mechanical ventilation on admission, n (%)  
   NO 8 (25)
   Non-invasive 2 (6.2)
   Invasive 22 (68.8)
Adverse event, n (%)  
   Vasopressor drugs 20 (62.5)
   Hemodialysis 2 (6.2)
   Hemofiltration 5 (15.6)
   Refractory hypoxemia requiring prone ventilation 8 (25.0)
   Secondary superinfection 3 (9.3)
Opacity in initial x-ray chest, n (%)  
   1/4 quadrants 5 (15.6)
   2/4 quadrants 4 (12.5)
   3/4 quadrants 8 (25.0)
   4/4 quadrants 15 (46.9)
  1. ALT = alanine aminotransferase; APACHE II = Acute Physiology And Chronic Health Evaluation II; AST = aspartate aminotransferase; ICU = intensive care unit; IQR = interquartile range; NO = nitric oxide; SD = standard deviation; SOFA = Sequential Organ Failure Assessment scoring system.