TABLE 7.

Comparison of between-laboratory precision in absolute T-cell counts for predicate method versus tetraONE method^a

T cells	CD4 stratum (cells/μl)	Median %CV (P vs predicate method)
		Predicate method	tetraONE method
CD4	All	18.2	9.6 (0.000)
	<200	19.5	9.6 (0.001)
	200–500	16.6	10.8 (0.001)
	>500	19.8	9.5 (0.009)
CD8	All	16.9	12.1 (0.000)
	<200	18.1	11.3 (0.000)
	200–500	15.4	14.8 (0.356)
	>500	18.8	10.8 (0.052)

^aSee Table 6, footnote a.