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Table 2 Characteristics of the 20 study patients who had confirmed infection with Novel Swine-Origin Influenza A (H1N1) Virus admitted to the ICU in 2009.

From: High success and low mortality rates with non-invasive ventilation in influenza A H1N1 patients in a tertiary hospital

Variables Values
APACHE II score 7 (7-12)
   Median (IQR)  
Presence of Acute Respiratory Failure (ARF) - n (%) 14 (70%)
Causes of Acute Respiratory Failure (ARF) - n (%)  
   Acute Respiratory Distress Syndrome (ARDS) 5 (35.7%)
   Pneumonia 9 (64.3%)
PaO 2 /FiO 2 ratio  
   median (IQR) 226.5 (106-315)
Mechanical Ventilation (MV) on admission - n (%)  
   No 6 (30%)
   Non-Invasive Ventilation (NIV) 12 (60%)
   Invasive Mechanical Ventilation (MV) 2 (10%)
Non-Invasive Ventilation ( NIV) success rate - n (%) 5 (41.6%)
Invasive Mechanical Ventilation (MV) during ICU - n (%) 9 (45%)
Mechanical Ventilation (MV) time  
   Mean (95% CI) 6 days (4.2-9)
Recruitment maneuver - n (%) 5 (55%)
Successful Mechanical Ventilation (MV) weaning rate - n (%) 8 (88.8%)
ICU length of stay  
   Median (IQR) 4 days (2-6)
Hospital length of stay  
   Median (IQR) 10 days (3-18)
ICU mortality rate - n (%) 3 (15%)
Hospital mortality - n (%) 3 (2.1%)
  1. 95% CI (confidence interval); IQR (interquartile range)