Table 2

Median time to viral clearance (first negative swab on RT-PCR for SARS-CoV-2) and IQR from diagnosis and from symptom onset by covariates calculated using Kaplan–Meier survival estimator on 1162 patients diagnosed before 22 March 2020, resident in the Reggio Emilia province, and followed up to 22 April 2020

	Time to viral clearance (first negative swab)
	From first positive swab		From symptom onset
	Median	25%–75%	Median	25%–75%
Total	30	23–40	36	28–45
Sex
M	28	21–39	35	27–45
F	31	25–40	37	29–45
Age categories
<50	29	22–40	35	26–44
50–59	28	21–39	35	27–45
60–69	29	22–39	36	29–43
70–79	33	25–44	39	32–50
≥80	31	24 N.A.	38	28–44
Citizenship
Italian	30	23–40	36	28–45
Foreign	28	23–39	32	26–45
Disease severity
No ED use No hospitalisation	28	21–37	33	25–41
ED use only	29	23–42	36	29–47
Hospitalisation*	32	25–42	38	30–47

*Hospitalisation excluding patients using Emergency Department only AND patients with no hospitalisation and no Emergency Department use.
ED, Emergency Department.