Table 3.

COVID-19 RT–PCR positive samples Ct value comparison with the AG-Q COVID-19 N-Antigen self-test result.

False Negative Results (n=19)				Weak Positive Results (n=10)
Ct value N/ORF1ab	RT–PCR	N-Antigen self	Interpretation	Ct value N/ORF1ab	RT–PCR	N-Antigen self	Interpretation
25/25	P	N	FN	36/34	P	WP	TP
33/34	P	N	FN	26/26	P	WP	TP
22/22	P	N	FN	28/30	P	WP	TP
27/27	P	N	FN	18/19	P	WP	TP
27/37	P	N	FN	31/32	P	WP	TP
24/23	P	N	FN	29/30	P	WP	TP
35/35	P	N	FN	27/28	P	WP	TP
29/30	P	N	FN	34/34	P	WP	TP
30/31	P	N	FN	36/35	P	WP	TP
30/32	P	N	FN	27/28	P	WP	TP
36/34	P	N	FN	True positive results
32/33	P	N	FN	Ct value N/ORF1ab	RT–PCR	N-Antigen self	Interpretation
31/31	P	N	FN	17/18	P	P	TP
27/28	P	N	FN	25/29	P	P	TP
25/26	P	N	FN	22/23	P	P	TP
26/27	P	N	FN	28/30	P	P	TP
26/27	P	N	FN	24/25	P	P	TP
36/35	P	N	FN	18/20	P	P	TP
31/32	P	N	FN	30/32	P	P	TP
True Positive results (n = 57)				30/31	P	P	TP
Ct value N/ORF1ab	RT–PCR	N-Antigen self	Interpretation	25/26	P	P	TP
29/31	P	P	TP	28/29	P	P	TP
27/28	P	P	TP	28/28	P	P	TP
29/30	P	P	TP	29/32	P	P	TP
31/31	P	P	TP	36/35	P	P	TP
25/26	P	P	TP	17/18	P	P	TP
32/32	P	P	TP	29/30	P	P	TP
29/29	P	P	TP	31/33	P	P	TP
22/21	P	P	TP	24/25	P	P	TP
19/18	P	P	TP	23/24	P	P	TP
29/28	P	P	TP	24/25	P	P	TP
22/21	P	P	TP	26/26	P	P	TP
22/23	P	P	TP	23/23	P	P	TP
26/25	P	P	TP	29/31	P	P	TP
30/29	P	P	TP	34/34	P	P	TP
31/31	P	P	TP	28/30	P	P	TP
24/23	P	P	TP	28/28	P	P	TP
27/32	P	P	TP	21/21	P	P	TP
21/29	P	P	TP	21/21	P	P	TP
21/29	P	P	TP	29/30	P	P	TP
23/20	P	P	TP	20/21	P	P	TP
28/30	P	P	TP	25/25	P	P	TP
23/22	P	P	TP	29/30	P	P	TP
				26/27	P	P	TP
				14/15	P	P	TP
				22/26	P	P	TP
				21/21	P	P	TP

P = Positive, N = Negative, FP = False Positive, FN = False Negative, WP = Weak Positive, TP = True Positive (WP is considered as TP in result reporting).