Table 2.

Overall analytical performances for saliva compared to nasopharyngeal specimens and for symptomatic and asymptomatic patients

	Symptomatic and asymptomatic patients	Symptomatic patients	Asymptomatic patients
Sensitivity (IC95%)	87.8 (83.3–92.3)	89.4 (84.9–93.9)	79.2 (62.9–95.4)
Specificity (IC95%)	97.1 (96.1–98.1)	96.2 (94.5–97.9)	98.0 (96.8–99.2)
PPV (IC95%)	92.3 (88.6–96)	94.7 (91.3–98.1)	76.0 (59.3–92.7)
NPV (IC95%)	97.8 (96.9–98.7)	96.4 (94.7–98.1)	99.2 (98.4–100.0)
Kappa (IC95%)	0.84 (0.80–0.88)	0.86 (0.82–0.90)	0.71 (0.57–0.85)

NP nasopharyngeal; PPV positive predictive value; NPV negative predictive value