Table 3.

Performance of the HBsAg Test (ETI‐MAK‐4) of Oral Fluid Collected with the Chembio Device According to the Population Studied

Population	N	Sensitivity%	Specificity%	PPV%	NPV%	k
		(CI 95%)	(CI 95%)	(CI 95%)	(CI 95%)	(%)
Entire population	191	95.2	100	100	99.42	97
		(76.2–99.9)	(97.85–100)	(83.16–100)	(96.78–99.99)
General population	144	100	100	100	100	100
Pantanal (MS)		(2.5–100.0)	(97–100)	(2.5–100)	(97.45–100)
Viral Hepatitis Centers	47	95	100	100	96.43	95
Rio de Janeiro (RJ)		(73.15–99.87)	(87.23–100)	(82.35 – 100)	(81.65–99.91)

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