CD4 and anemia: With respect to medical parameters, when assessing factors potentially associated with risk of mortality, univariate analysis revealed that baseline CD4 less than 500 cell/mm3 (p = 0.001), non-exposure to nevirapine prophylaxis for PMTCT (p = 0.014), horizontal mode of HIV transmission (0.001) and anemia (p = 0.001) appeared as determinants of mortality among these adolescents.