Total lymphocyte count: not a surrogate marker for risk of death in HIV infected Ugandan children

Abstract

Objectives—To determine the utility of Total Lymphocyte Count (TLC) in predicting the 12 month mortality in HIV infected Ugandan children; to correlate TLC and CD4 cell %. Design—This is a retrospective data analysis of clinical and laboratory data collected prospectively on 128 HIV infected children in the HIVNET 012 trial. Methods—TLC and CD4 cell % measurements were obtained at birth, 14 weeks and 12, 24, 36, 48, and 60 months of age and assessed with respect to risk of death within 12 months. Results—Median TLC/ul (CD4 cell %) were 4150 (41%) at birth, 4900 (24%) at 12 months, 4300 (19%) at 24 months, 4150 (19 %) at 36 months, 4100 (18%) at 48 months and 3800 (20%) at 60 months. The highest risk of mortality within 12 months was 34–37% at birth and declined to 13– 15% at 24 months regardless of TLC measurement. The correlation between CD4 cell % and TLC was extremely low overall (r = 0.01). Conclusion—The TLC did not predict a risk of progression to death within 12 months and therefore TLC alone may not be a useful surrogate marker for determining those children in greatest need for antiretroviral therapy in HIV infected Ugandan children.