Table 2

Variables at enrolment associated with failure of treatment

VariableUnivariate analysis
p value
Multivariate analysis
Odds ratiop value
Age0.569
Sex0.526
H+ <0.0011.22 (1.09 to 1.37) per nmol/l<0.01
Pao 2 0.035
Paco 2 <0.0011.14 (1.14 to 1.81) per kPa<0.01
Respiratory rate0.330
Radiographic consolidation0.136
Allocation to NIV0.0380.39 (0.19 to 0.80)<0.01
  • Paco2 , Pao 2 = arterial carbon dioxide and oxygen tensions; NIV = non-invasive ventilation.