TABLE 6.

Comparison of means, medians, and 95th percentile reference ranges of lymphocyte subset absolute counts for HIV-negative adult Ethiopians with those of HIV-negative adult Dutch subjects^a

Subject group (n) and parameter	Lymphocyte count	CD4 T-cell count	CD8 T-cell count	CD4/CD8 T-cell ratio	CD3 T-cell count	B-cell count	NK cell count
Ethiopians (142)
Mean ± SD	1,857 ± 576	775 ± 225	747 ± 333	1.2 ± 0.5	1,555 ± 463	191 ± 94	250 ± 137
Median	1,781	761	637	1.2	1,471	178	226
95% range	1,032–3,432	366–1,235	311–1,618	0.4–2.4	854–2,556	51–419	75–581
Dutch (1,356)
Mean ± SD	2,054 ± 573	993 ± 319	506 ± 220	2.2 ± 1.0	1,525 ± 458	313 ± 147	NAc
Median	1,985 (0.0001)b	950 (0.0001)	460 (0.0001)	2.0 (0.0001)	1,460 (0.47)	290 (0.0001)	NA
95% range	1,120–3,390	509–1,761	200–1,042	0.9–4.8	819–2,591	110–670	NA

^aAbsolute counts were measured per microliter of whole blood. 

^bAll values in parentheses are P values (Mann-Whitney U test) for comparison of medians for Ethiopian and Dutch subjects. 

^cNA, not available.