Table 5.

Performance of the HBsAg Assay on Oral Fluid Samples Collected using Salivette Devices and Tested with HBsAg One According to the Population Studied; CO Values Based on ROC Curve Analysis

Population	n	Sensitivity%	Specificity%	PPV%	NPV%	k
		(CI 95%)	(CI 95%)	(CI 95%)	(CI 95%)	(%)
Entire population	191	78.3	89.9	51.4	96.8	55.0
		(56.3–92.5)	(84.3–93.9)	(33.9–68.6)	(92.7–98.9)
General population	144	100.0	94.4	11.1	100.0	18.0
Pantanal (MS)		(2.5–100.0)	(89.3–97.5)	(0.2–48.2)	(97.3–100.0)
Viral Hepatitis Centers	47	77.3	64.0	65.4	76.19	40.0
Rio de Janeiro (RJ)		(54.6–92.2)	(42.5–82.0)	(44.3–82.8)	(52.8–91.8)

PPV, positive predictive value; NPV, negative predictive value; CI, confidence interval.