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. 2021 May 11;117:372–377. doi: 10.1016/j.ijid.2021.04.064

Table 4.

Ct values of SARS-CoV-2 gene ORF1ab and N in samples of throat swab collected from patients with COVID-19.

Variable ORF1ab gene
N gene
n (%) Ct value P-value n (%) Ct value P-value
Clinical category
Mild 61(70.1) 28.40 ± 5.02 0.475 13(22.4) 31.14 ± 3.33 0.029
Moderate 19(21.8) 27.96 ± 4.78 41(70.7) 28.72 ± 6.21
Severe 7(8.1) 25.76 ± 9.55 4(6.9) 22.12 ± 6.94
Transmission generations
Index case 43(49.4) 27.40 ± 5.32 0.297 25(43.1) 27.03 ± 4.59 0.091
1 st generation 39(44.8) 29.07 ± 5.09 29(50.0) 29.77 ± 6.99
2nd + 3rd generation 5(5.8) 26.41 ± 8.12 4(6.9) 32.90 ± 2.75
Total 87(100.0) 28.09 ± 5.41 58(100.0) 28.80 ± 6.02