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. 2020 Aug 5;99:279–285. doi: 10.1016/j.ijid.2020.07.070

Table 2.

Data on follow-up RT-PCR assays for SARS-CoV-2; Continuous data are expressed as median values (interquartile range) and categorical data are presented as numbers (%).

Asymptomatic group (n = 68) Symptomatic group (n = 328) p-Value
Interval between diagnosis and the first follow-up RT-PCR assay (days) 9.5 (7.0–14.0) 16.0 (13.0–19.0) <0.001
Number of follow-up RT-PCR assays 3.0 (2.0–5.0) 2.0 (2.0–4.0) 0.055
Median interval between follow-up RT-PCR assays (days) 2.0 (1.0–4.0) 2.0 (1.0–3.0) 0.430
Time until negative conversion (days) 14.5 (11.0–21.0) 18.0 (15.0–22.0) 0.001
Rebound of Ct value 15 (22.1) 63 (19.2) 0.616

Ct, cycle threshold; RT-PCR, reverse transcriptase polymerase chain reaction; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.