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 subjectsa

Subject group (n) and parameterLymphocyte countCD4 T-cell countCD8 T-cell countCD4/CD8 T-cell ratioCD3 T-cell countB-cell countNK cell count
Ethiopians (142)
 Mean ± SD1,857 ± 576775 ± 225747 ± 3331.2 ± 0.51,555 ± 463191 ± 94 250 ± 137
 Median1,7817616371.21,471178226
 95% range1,032–3,432366–1,235311–1,6180.4–2.4854–2,55651–41975–581
Dutch (1,356)
 Mean ± SD2,054 ± 573993 ± 319506 ± 2202.2 ± 1.01,525 ± 458313 ± 147NAc
 Median1,985 (0.0001)b 950 (0.0001)460 (0.0001)2.0 (0.0001)1,460 (0.47)290 (0.0001)NA
 95% range1,120–3,390509–1,761200–1,0420.9–4.8819–2,591110–670NA
  • a Absolute counts were measured per microliter of whole blood.

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

  • c NA, not available.