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. 2012 Jan 18;68(1):16–19. doi: 10.1016/S0377-1237(11)60127-5

Table 1.

Distribution of the human immunodeficiency virus (HIV)-1 infected study participants (n = 100) as per the centres for disease control classification system for HIV-infected adults and adolescents22 with the mean CD4 T lymphocyte counts in each category.

CDC classification category No. of participants Mean CD4 T lymphocyte count (per mm3)
Category 1: CD4 11 660
 T cells > 500 cells/mm3
Category 2: CD4 30 297
 T cells 200–499 cells/mm3
Category 3: CD4 59 82
 T cells < 200 cells/mm3

CDC: Centres for Disease Control.