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Table 5 Comparison between TST and IGRA in 90 patients infected with HIV at risk of LTBI

From: Interferon-γ release assay as a sensitive diagnostic tool of latent tuberculosis infection in patients with HIV: a cross-sectional study

Test Measure Estimate CI 95%
TST Se 69.57 57.31 80.08
S 47.62 25.71 70.22
PPV 81.36 69.09 90.31
NPV 32.26 16.68 51.37
IGRA Se 98.55 92.19 99.96
Es 66.67 43.03 85.41
PPV 90.67 81.71 96.16
NPV 93.33 68.05 99.83
  1. HIV Human Immunodeficiency virus, TST Tuberculin Skin Test, IGRA Interferon-γ release assay, CI confidence intervals, Se sensitivity, S specificity NPV, negative predictive value, PPV positive predictive value