Table 1.

Participants’ grouping, variables, and cut-offs adopted for the TreCovid19 app.

Variables	Cut-off score or criterion
	Red group (Acv19)	Blue group (AIOcv19)
Body temperature (°C)	≥39	≥37.5
Pain (Numerical Rating Scale)	≥4	≥4
Fatiguea	≥7	≥7
Peripheral oxygen saturation (SpO2, %)b	≤95	N/Ac
Dyspnoea	≥4	≥3
Level of consciousness	Confused or coma	Confused or coma
Deep vein thrombosis	Yes	Yes
Respiratory rate (per min)	≥22	≥22
Assumption of antipyretics	N/A	Yes

^aFatigue was measured based on a self-reported assessment scale ranging from 0 (not at all) to 10 (very much).

^bSpO₂ was considered only when oximeter was available.

^cN/A: not applicable.