Table 4B.

Number of false-positive and false-negative results in a hypothetical cohort of 10 000 people tested with the Abbott –RDT.

Hypothetical cohort (assumed number = 10,000)	Prevalence rate	Expected number of true positives	Sensitivity (%)	Specificity (%)	Number of false positives (95% CI)*	Number of false negatives (95% CI)*
Symptomatic persons	0.05	500	74.32	99.73	25 (16, 36)	128 (107, 151)
	0.10	1,000	74.32	99.73	24 (15, 34)	257 (227, 287)
	0.20	2,000	74.32	99.73	21 (13, 31)	513 (472, 556)
Symptomatic persons: SARS-CoV-2 NIM	0.05	500	78.10	99.73	25 (16, 36)	110 (90, 130)
	0.10	1,000	78.10	99.73	24 (15, 34)	219 (191, 248)
	0.20	2,000	78.10	99.73	21 (13, 31)	438 (398, 479)
Symptomatic persons: SARS-CoV-2 Alpha variant	0.05	500	71.12	99.73	25 (16, 36)	144 (121, 169)
	0.10	1,000	71.12	99.73	24 (15, 34)	289 (256, 322)
	0.20	2,000	71.12	99.73	21 (13, 31)	577 (532, 622)
Asymptomatic persons	0.005	50	23.28	99.96	4 (1, 9)	38 (27, 51)
	0.01	100	23.28	99.96	4 (1, 9)	77 (60, 94)
	0.02	200	23.28	99.96	4 (1, 9)	153 (130, 178)
Asymptomatic persons: SARS-CoV-2 NIM	0.005	50	24.39	99.96	4 (1, 9)	38 (27, 50)
	0.01	100	24.39	99.96	4 (1, 9)	76 (59, 93)
	0.02	200	24.39	99.96	4 (1, 9)	152 (128, 176)
Asymptomatic persons: SARS-CoV-2 Alpha variant	0.005	50	21.58	99.96	4 (1, 9)	39 (28, 52)
	0.01	100	21.58	99.96	4 (1, 9)	78 (61, 96)
	0.02	200	21.58	99.96	4 (1, 9)	157 (133, 183)

^*mean (2.5%,97.5%).