TABLE 3.

Intra- and interassay variabilities of Aries and Xpress assays^a

Device	Virus	Operator 1		Operator 2		Operator 3		Inter-CV (%)
		CT (mean ± SD)	Intra-CV (%)	CT (mean ± SD)	Intra-CV (%)	CT (mean ± SD)	Intra-CV (%)
Aries	FluA	24.0 ± 0.80	3.3	24.3 ± 0.46	1.9	23.9 ± 0.35	1.5	2.1
	FluB	26.8 ± 0.14	0.5	26.7 ± 0.14	0.5	27.3 ± 0.40	1.5	1.9
	RSV	24.8 ± 0.72	2.9	25.2 ± 0.82	3.3	25.1 ± 0.27	1.1	2.2
Xpressb	FluA1	19.4 ± 0.27	1.4	19.0 ± 0.38	2.0	18.3 ± 0.27	1.5	2.9
	FluA2	22.3 ± 0.50	2.3	21.8 ± 0.51	2.4	21.6 ± 0.78	3.6	2.7
	FluB	20.8 ± 0.93	4.5	20.4 ± 0.35	1.7	20.7 ± 0.21	1.0	2.6
	RSV	21.5 ± 0.15	0.7	21.3 ± 0.17	0.8	21.0 ± 1.28	6.1	3.2

^aC_T, threshold cycle; CV, coefficient of variation.

^bTwo channels (FluA1 and FluA2) are used to detect most influenza virus A strains.