Table 2.

Median day of symptoms onset by system determined from Kaplan-Meier curves

System	Median (95% CI)	P value
		versus systemic	versus upper	versus lower
Systemic	1 (1 to 1)	N/A	0.032	<0.001
Upper	1 (1 to 1)	0.032	N/A	<0.001
Lower	3 (2 to 4)	<0.001	<0.001	N/A
Gastrointestinal	4 (3 to 5)	<0.001	<0.001	0.306

Systemic=fever, body aches, chills, dizziness, headache, joint pain; upper=cough, congestion, sore throat, loss of smell or taste; lower=shortness of breath with exertion, shortness of breath at rest, chest tightness, wheezing; gastrointestinal=nausea, abdominal pain, diarrhoea.

N/A, not available.