Table 3.

Overview of anti-SARS-CoV-2 Elecsys-N and Elecsys-S testing results, available SARS-CoV-2 RNA PCR testing results and results of supplemental testing using Abbott and Wantai assays in 45 individuals with Elecsys-N/Elecsys-S discordant results. For SARS-CoV-2 RNA–positive individuals the date of the first recorded PCR positive result is presented, and for SARS-CoV-2 RNA–negative individuals the date of the last recorded PCR negative result is presented. N/A = no record in the national SARS-CoV-2 PCR notification database.

Sample ID	Testing date (M/D/Y)	Elecsys-N		Elecsys-S		SARS-CoV-2 RNA PCR		Abbott	Wantai
		Value (pos ≥ 1.0)	Result	Value (pos ≥ 0.80 U/mL)	Result	Nasopharyngeal swab collection date (M/D/Y)	PCR result	Result	Result
1	10/28/2020	0.104	NEG	1.16	POS	10/16/2020	POS	NEG	POS
2	10/29/2020	0.149	NEG	1.48	POS	11/02/2020	POS	NEG	POS
3	10/20/2020	0.089	NEG	1.61	POS	04/22/2020	NEG	NEG	NEG
4	11/01/2020	0.462	NEG	2.25	POS	04/30/2020	NEG	NEG	POS
5	12/04/2020	0.227	NEG	2.45	POS	04/24/2020	POS	NEG	POS
6	12/04/2020	0.090	NEG	2.63	POS	03/23/2020	NEG	NEG	POS
7	11/19/2020	0.421	NEG	3.27	POS	11/06/2020	POS	NEG	POS
8	10/29/2020	0.093	NEG	3.79	POS	04/12/2020	NEG	NEG	POS
9	10/24/2020	0.750	NEG	6.65	POS	09/10/2020	POS	NEG	POS
10	11/20/2020	0.568	NEG	7.30	POS	N/A	N/A	NEG	POS
11	11/20/2020	0.384	NEG	10.19	POS	10/14/2020	POS	NEG	POS
12	10/23/2020	0.259	NEG	11.62	POS	04/28/2020	POS	NEG	POS
13	10/30/2020	0.731	NEG	14.89	POS	10/16/2020	POS	NEG	POS
14	11/13/2020	0.862	NEG	28.14	POS	09/14/2020	POS	NEG	POS
15	10/29/2020	0.848	NEG	33.06	POS	09/01/2020	POS	NEG	POS
16	11/30/2020	0.655	NEG	9.75	POS	10/20/2020	POS	NEG	POS
17	11/30/2020	0.095	NEG	1.63	POS	10/17/2020	POS	NEG	POS
18	12/01/2020	0.597	NEG	6.89	POS	11/16/2020	POS	NEG	POS
19	12/08/2020	0.091	NEG	15.11	POS	N/A	N/A	NEG	POS
20	12/09/2020	0.143	NEG	2.06	POS	N/A	N/A	NEG	POS
21	12/10/2020	0.376	NEG	2.13	POS	N/A	N/A	NEG	POS
22	12/10/2020	0.355	NEG	4.08	POS	N/A	N/A	NEG	POS
23	12/14/2020	0.501	NEG	28.26	POS	N/A	N/A	NEG	POS
24	12/17/2020	0.775	NEG	6.42	POS	11/20/2020	POS	NEG	POS
25	11/05/2020	1.38	POS	< 0.400	NEG	N/A	N/A	POS	NEG
26	11/17/2020	1.44	POS	< 0.400	NEG	N/A	N/A	POS	NEG
27	10/22/2020	1.44	POS	< 0.400	NEG	08/21/2020	NEG	POS	NEG
28	11/09/2020	1.59	POS	0.446	NEG	10/24/2020	POS	POS	NEG
29	11/09/2020	1.65	POS	< 0.400	NEG	N/A	N/A	POS	NEG
30	11/01/2020	1.65	POS	< 0.400	NEG	10/20/2020	POS	POS	NEG
31	10/25/2020	1.67	POS	< 0.400	NEG	04/21/2020	NEG	NEG	NEG
32	11/06/2020	1.87	POS	< 0.400	NEG	N/A	N/A	POS	NEG
33	11/06/2020	2.35	POS	< 0.400	NEG	N/A	N/A	NEG	NEG
34	10/26/2020	2.41	POS	< 0.400	NEG	04/25/2020	NEG	POS	NEG
35	10/07/2020	2.45	POS	< 0.400	NEG	N/A	N/A	POS	NEG
36	11/04/2020	4.15	POS	0.462	NEG	N/A	N/A	POS	NEG
37	10/18/2020	4.75	POS	< 0.400	NEG	03/21/2020	NEG	NEG	NEG
38	10/21/2020	4.84	POS	< 0.400	NEG	05/25/2020	NEG	NEG	NEG
39	11/02/2020	5.97	POS	< 0.400	NEG	05/24/2020	NEG	POS	NEG
40	11/12/2020	7.47	POS	0.413	NEG	10/12/2020	NEG	POS	POS
41	11/18/2020	7.63	POS	< 0.400	NEG	08/04/2020	NEG	POS	NEG
42	11/20/2020	8.12	POS	0.626	NEG	11/20/2020	POS	POS	NEG
43	11/02/2020	10.56	POS	< 0.400	NEG	10/30/2020	NEG	POS	NEG
44	11/09/2020	10.86	POS	< 0.400	NEG	07/16/2020	NEG	POS	NEG
45	10/27/2020	25.73	POS	0.505	NEG	10/15/2020	POS	POS	NEG