Table 1 Clinical and laboratory data

To: randomization

Underlying disease

ARF characteristics

First 24 hours

Respiratory rate, SpO₂, oxygen flow or FiO₂

Day1 to Day7, Day14, Day28

Respiratory data

SOFA score

Course of respiratory and other organ failure

Suspected diagnosis every day

Tolerance of NIV in NIV group

Intubation criteria in both groups

Day28

Mortality

Diagnosis of ARF

Respiratory investigations

Hospital acquired infections

Day180

Mortality