TABLE 2.

Interrun and intrarun variabilities^a

Parameter	Interrun variability			Intrarun variability
	Low-viremia sample	High-viremia sample	HDV plasmid	Low-viremia sample	Medium-viremia sample	High-viremia sample
No. of determinations	17	12	23	14	14	14
No. of copies per ml (mean ± SD)	5.4 × 103 ± 1.2 × 103	2.0 × 105 ± 2.6 × 104	1.7 × 106 ± 4.9 × 105	5.1 × 102 ± 1.5 × 102	6.5 × 103 ± 2.6 × 103	2.6 × 105 ± 6.4 × 104
% CV (SD/mean)	22.4	13.3	28.7	29.8	40.5	24.7
Log10 no. of copies per ml (mean ± SD)	3.73 ± 0.09	5.29 ± 0.06	6.21 ± 0.16	2.71 ± 0.13	3.75 ± 0.28	5.40 ± 0.11
Log10 % CV (SD/mean)	2.5	1.1	2.6	5.0	7.5	2.1

^aInterrun variability was tested with two positive control samples (with low and high levels of viremia) and the HDV plasmid. Intrarun variability was tested with samples with low, medium, and high levels of viremia.