Table 1.

Levels and description of the ordinal‐scale disease severity endpoint.

Patient state	Descriptor	Level
Uninfected	Uninfected; no viral RNA detected	0
Ambulatory mild disease	Asymptomatic; viral RNA detected	1
	Symptomatic; independent
	Symptomatic; assistance needed
Hospitalized; moderate disease	Hospitalized; no oxygen therapy	2
	Hospitalized; oxygen by mask or nasal prongs
Hospitalized; severe disease	Hospitalized; oxygen by NIV or high flow	3
	Intubation and mechanical ventilation
Dead	Dead	4