Table 4.

Multivariate regression model of viral clearance confirmation including all subjects with a first nasopharyngeal swab negative for SARS-CoV-2 assessed by RT-PCR and retested (n=554) before 22 April 2020. Patients were included if diagnosed before 22 March 2020, and resident in the Reggio Emilia province

Viral clearance confirmation	OR	P-value	95% CI
Time to first negative swab (days)	1.16	0.00	1.06 to 1.26
Sex
M	1
F	0.43	0.08	0.17 to 1.09
Age	0.99	0.49	0.98 to 1.01

CI, Confidence Interval; OR, Odds Ratio.