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.