Table 2.

Comparison of performances of reported rapid antigen kits with this ELISA system, including different test conditions

Study	Sensitivity	Specificity	Ct value	Sample type	Manufacturer	Reference
Fenollar et al.	75.4	94.8	<35	Fresh	PANBIO COVID-19 Ag rapid test device (Abbott)	[25]
Torres et al.	48.1	100	<35	Fresh	PANBIO COVID-19 Ag rapid test device (Abbott)	[26]
Scohy et al.	30.1	100	<36	Mixed	COVID-19 Ag Respi-Strip	[27]
Stromer et al.	63.7	100	<37	NR	NADAL® COVID-19 Ag	[28]
Kohmer et al.	50	96.8	<37	Fresh	NADAL® COVID-19 Ag	[29]
Cerutti et al.	70.6	100	<38	Mixed	STANDARD Q COVID- 19 Ag (SD-Biosensor)	[30]
Adnan et al.	69.6	99	<35	Mixed	In-house	This study
Adnan et al.	75.4	99	<30	Mixed	In-house	This Study

Here, fresh sample type means immediately tested with rapid antigen kit; mixed type means few were preserved and tested later.

NR = not reported.