Table 2. Diagnostic accuracy of canine detection as compared to the reference standard (nasopharyngeal RT-PCR, positivity defined as at least one target gene being detected), according to the presence of symptoms in study participants.

	Total, n	Positive sample, n	Sensitivity (95% CI*)	Specificity (95% CI*)
Overall	335	109	97% (92 to 99)	91% (87 to 95)
Symptoms	143	78	96% (89 to 99)	83% (72 to 91)
No symptom	192	31	100% (89 to 100)	94% (90 to 97)

*95% CI: 95% Confidence Interval