Figure 2From: Improved sensitivity of an interferon-gamma release assay (T-SPOT.TB™) in combination with tuberculin skin test for the diagnosis of latent tuberculosis in the presence of HIV co-Infection Proportion of positive test results of TST and T-SPOT.TB and indeterminate T-SPOT.TB results according to CD4 cell count (test for trend p = 0.135 for the association between CD4 cell count and T-SPOT.TB).Back to article page