Table 2. Respiratory support.

Favipiravir initiation time	≤72 h (n = 133)	>72 h (n = 47)	P-value
Supplemental oxygen	104	2	0.0001
High-flow nasal oxygen	2	7	0.02
Non-invasive mechanical ventilation	4	3	0.3
Invasive ventilation	23	35	0.001