Skip to main content

Table 4 Characteristics of patients receiving non-invasive ventilation on admission, and comparison to those receiving invasive ventilation

From: Lung Function and Organ Dysfunctions in 178 Patients Requiring Mechanical Ventilation During The 2009 Influenza A (H1N1) Pandemic

  NIV (n= 49) Non-NIV (n= 129) P
Proportion of the entire population 28% 72%  
Age (years) 40 ± 16 44 ± 15 0.26
Gender (male) 25 (51%) 73 (57%) 0.51
APACHE II 16 ± 6 19 ± 7 0.01
PaO2/FIO2 day0 129 (70 to 173) 141 (92 to 217) 0.12
PCO2 day0 42 (37 to 55) 42 (34 to 51) 0.23
COPD999 6/49 (12%) 22/129 (17%) 0.24
Asthma 2/49 (4%) 8/129 (6%) 0.58
CHF 1/49 (2%) 9/129 (7%) 0.20
Pregnancy 5/48 (10%) 11/128 (9%) 0.71
Immunosupression 3/49 (6%) 26/129 (20%) 0.03
Obesity1 12/49 (24%) 34/129 (26%) 0.80
Hospital mortality 19 (39%) 66 (51%) 0.14
Total duration of mechanical ventilation (days)2 12 (6 to 21) 10 (6 to 16)] 0.15
LOSICU 15 (8 to 25) 11 (7 to 17) 0.06
LOSHOSPITAL 19 (11 to 25) 16 (8 to 23) 0.06
  1. CHF, chronic heart failure; COPD, chronic obstructive pulmonary disease; LOSICU, length of stay at the ICU, in days; LOSHOSPITAL, length of stay at the hospital, in days; NIV, non-invasive ventilation
  2. 1 Obesity was defined as a BMI > 30
  3. 2 Refers to the sum of the duration of NIV plus the duration of invasive ventilation.