Table 1. Distribution of Exdia Ag test result according to cycle threshold (Ct) values of Real-Q assay (RdRp gene)

Ann Clin Microbiol 2022;25:73-78. On-field evaluation of exdia COVID-19 antigen point-of-care testing in the emergency department during the COVID-19 pandemic

Table 1. Distribution of Exdia Ag test result according to cycle threshold (Ct) values of Real-Q assay (RdRp gene)

Ct value of Real-Q assay (RdRp gene)	Exdia Ag result
Ct value of Real-Q assay (RdRp gene)	Positive No. (%)	Negative No. (%)
≤ 15 (n = 59)	58 (98.3)	1 (1.7)
15 < Ct ≤ 20 (n = 41)	38 (92.7)	3 (7.3)
20 < Ct ≤ 25 (n = 18)	13 (72.2)	5 (27.8)
25 < Ct ≤ 30 (n = 16)	4 (25.0)	12 (75.0)
> 30 (n = 15)	2 (13.3)	13 (86.7)

Abbreviations: Exdia Ag, Exdia COVID-19 antigen; Real-Q, Real-Q 2019-nCoV Detection KIT; RdRp, RNA-dependent RNA polymerase gene.