Table 2.

Diagnostic performance of the eight scent detection dogs

	Detect-ion by dog	SARS-CoV-2 infection status		Total number	Diagnostic specificity (Sp)	Diagnositic sensitivity (Se)	Standard Error (SE) Sp	Standard Error (SE) Se	Confidence Interval (95%CI) Sp	Confidence Interval (95%CI) Se	Negative predictive value (NPV)	Positive predictive value (PPV)	Standard Error (SE) NPV	Standard Error (SE) PPV	Confidence Interval (95%CI) NPV	Confidence Interval (95%CI) PPV
		negative	positive
Dog 1	No	89	3	113	0.99	0.87	0.01	0.07	0.002	0.029	0.97	0.95	0.02	0.04	0.004	0.018
	Yes	1	20
Dog 2	No	91	1	115	0.97	0.95	0.02	0.05	0.004	0.020	0.99	0.87	0.48	0.07	0.097	0.031
	Yes	3	20
Dog 3	No	81	2	104	0.99	0.91	0.01	0.06	0.003	0.026	0.98	0.95	0.62	0.05	0.134	0.019
	Yes	1	20
Dog 4	No	95	4	120	0.97	0.82	0.02	0.08	0.003	0.034	0.96	0.86	0.69	0.07	0.136	0.031
	Yes	3	18
Dog 5	No	110	2	135	0.97	0.91	0.02	0.06	0.003	0.026	0.98	0.87	0.53	0.07	0.099	0.030
	Yes	3	20
Dog 6	No	137	8	170	0.96	0.71	0.02	0.09	0.003	0.032	0.94	0.80	0.78	0.08	0.129	0.028
	Yes	5	20
Dog 7	No	92	5	122	0.95	0.80	0.02	0.08	0.004	0.031	0.95	0.80	0.78	0.08	0.156	0.031
	Yes	5	20
Dog 8	No	97	8	133	0.92	0.70	0.03	0.09	0.005	0.033	0.92	0.68	0.89	0.09	0.170	0.034
	Yes	9	19
Total	No	792	33	1012	0.96	0.83	0.01	0.03	0.0004	0.004	0.96	0.84	1.18	0.03	0.081	0.004
	Yes	30	157