TABLE 2.

Interassay variation of results obtained by the automated versus the manual sample extraction protocol

Sample no.	Mean no. of HIV-1 RNA copies/ml detected by the following protocol:		SD		Coefficient of variation (%)
	Automateda	Manualb	Automated	Manual	Automated	Manual
1	8.7 × 101	1.1 × 102	5.8 × 101	8.0 × 101	66	69
2	4.3 × 103	6.2 × 103	2.3 × 103	2.2 × 103	53	36
3	8.0 × 103	1.3 × 104	2.9 × 103	5.9 × 103	36	46
4	9.8 × 103	5.7 × 103	2.8 × 103	2.4 × 103	28	41
5	1.9 × 104	1.5 × 104	6.2 × 103	3.7 × 103	32	24
6	2.0 × 104	2.0 × 104	8.9 × 103	1.9 × 103	44	10
7	2.8 × 104	2.9 × 104	8.1 × 103	7.9 × 103	29	27
8	6.6 × 104	5.3 × 104	1.4 × 103	2.6 × 104	21	48

^aAutomated sample preparation followed by the LCx HIV RNA Quantitative assay.

^bManual sample preparation followed by the LCx HIV RNA Quantitative assay.