Korean Journal of Family Practice

Table. 4.

Ct values according to symptom duration in real-time RT-PCR positive group (N=320)

Symptom duration P-value
Within 1 wk More than 1 wk
Sputum
E gene 21.8±5.8 24.0±5.0 0.005
RdRP gene 23.3±5.5 25.1±4.6 0.022
N gene 24.3±5.5 26.8±4.8 0.005
NPS & OPS
E gene 20.0±6.1 23.3±5.1 <0.01
RdRP gene 21.5±5.8 24.5±4.7 <0.01
N gene 23.1±5.7 26.1±4.7 <0.01

Values are presented as mean±standard deviation

Ct, cut-off cycle threshold; RT-PCR, reverse transcription polymerase chain reaction; E gene, envelope gene; RdRP gene, RNA dependent RNA polymerase gene; N gene, nucleocapsid gene; NPS, nasopharyngeal swabs; OPS, oropharyngeal swab.

P-value by Mann-Whitney U test.

Korean J Fam Pract 2021;11:164~169 https://doi.org/10.21215/kjfp.2021.11.3.164
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