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. 2011 Sep;9(6):383–392. doi: 10.2174/157016211798038524

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© 2011 Bentham Science Publishers

This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.5/), which permits unrestrictive use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. (5) — Changes in CD4 cell counts during 4 years of antiretroviral therapy. The graph shows the changes in proportions (%) of patients with CD4 cell counts below the threshold of 1000 cells/ mm³ stratified into 100 CD4 cell strata. The tuberculosis (TB) incidence risk ratios (IRR) are shown for each stratum with the comparator being the CD4 cell stratum greater than 500 cell/ mm³. The IRR are greatest in the lower CD4 cell strata. The proportions of patients with less than 300 cells/ mm3 decreased over 4 years. (Data from Lawn SD, Myer L, Edwards D, Bekker LG, Wood R. [57]).