TABLE 2.

Sensitivity and specificity of the ACT assay performed on USs and FCU according to presence (+) or absence (−) of symptoms

Specimen	Presence of symptoms	Sensitivity			Specificity
		%	No. identified/no. total	95% CIa	%	No. identified/no. total	95% CIa
US	+	96.5	136/141	91.9-98.8	95.9	417/435	93.5-97.5
	−	98.9	94/95	94.3-100	97.5	634/650	96.0-98.6
	Both	97.5	230/236	94.5-99.1	96.9	1,051/1,085	95.6-97.8
FCU	+	94.3	133/141	89.1-97.5	98.2	427/435	96.4-99.2
	−	98.9	94/95	94.3-100	98	638/657	96.6-98.9
	Both	96.2	227/236	92.9-98.2	98.1	1,065/1,086	97.1-98.8

^aCI, confidence interval.