Table 2.

Means, medians, and 95th percentile reference ranges of WBC subset absolute counts for 142 HIV-negative adult Ethiopiansa

Subject group (n) and parameterGranulocyte countMonocyte countLymphocyte countCD4 T-cell countCD8 T-cell countCD4/CD8 T-cell ratioCD3 T-cell countB-cell countNK cell count
Male (92)
 Mean ± SD3,083 ± 1,361359 ± 1361,857 ± 606753 ± 227777 ± 3621.1 ± 0.41,564 ± 485184 ± 96277 ± 143
 Median2,7753241,8017336451.11,465170272
 95% range1,053–7,179166–697956–3,474306–1,249318–1,8910.4–2.1696–2,73831–42056–639
Female (50)
 Mean ± SD3,009 ± 1,287314 ± 1201,856 ± 522816 ± 218692 ± 2691.3 ± 0.51,539 ± 423203 ± 91258 ± 153
 Median3,093 (0.98)b276 (0.05)1,701 (0.88)810 (0.17)632 (0.30)1.2 (0.03)1,483 (0.84)198 (0.17)227 (0.36)
 95% range750–5,52196–6221,098–3,487456–1,368273–1,4180.6–2.7871–2,41361–47185–871
  • 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 male and female subjects.