Table 1a.

Assessment of sensitivity and specificity of the RST test (with 95% confidence interval) with respect to the nasopharyngeal swab, in the overall sample and stratified according to the setting of recruitment and presence of COVID-19 symptoms at the time of the swab test.

	Sensitivity assessment		Specificity assessment
	n, N^	Sensitivity (95%CI)	n, N*	Specificity (95%CI)
All subjects	26, 28	0.93 (0.77; 0.99)	38, 91	0.42 (0.32; 0.53)
Setting of the nasopharyngeal swab procedure
COVID-19 hospitalized patients	23, 25	0.92 (0.74; 0.99)	4, 13	0.31 (0.09; 0.61)
ER patients	2, 2	1.0 (0.16; 1.0)	7, 18	0.39 (0.17; 0.64)
Healthcare workers	1, 1	1.0 (-)	27, 60	0.45 (0.32; 0.58)
COVID-19 symptoms
Any symptom	22, 24	0.92 (0.73; 0.99)	7, 17	0.41 (0.18; 0.67)
No symptoms	4, 4	1.0 (0.40; 1.0)	31, 74	0.42 (0.31; 0.54)

°: 3 subjects with a technically failed RST test (1 positive and 2 negative to the nasopharyngeal swab) were excluded.

^: n=number of subjects with positive RST, N=number of subjects with positive nasopharyngeal swab.

*: n=number of subjects with negative RST, N=number of subjects with negative nasopharyngeal swab

95%Confidence Interval (CI) from exact binomial distribution. (-): not reported.