Table 3

 Univariate analysis (variables compared using χ2 test with Yates’s continuity correction)

VariableAlive Died p ValueOdds ratio95% CI
Inotrope supportYes1380<0.0014.362.06to 9.39
No4462
Type of respiratory failureType 11477<0.0013.581.72 to 7.56
Type II4366
SexMale43940.240.620.29 to 1.32
Female1449
Use of tracheotomyYes26360.010.400.2 to 0.8
No31107