Fig. 1
From: Enhancing the interferon-γ release assay through omission of nil and mitogen values
Nil (a), TBAg (b), and TBAg − Nil (c) IFN-γ levels in the active-TB, IGRA-positive non-TB, and IGRA-negative non-TB groups. Cases with indeterminate IGRA results were excluded. Boxes span the 25th to 75th percentiles, whiskers indicate the 10th and 90th percentiles, and bullets represent outliers. Nil nil tube, TBAg tuberculosis antigen tube, TBAg − Nil TBAg minus Nil, IFN-γ interferon-γ, TB tuberculosis, IGRA interferon-γ release assay, non-TB non-tuberculosis, IGRA + IGRA-positive, IGRA- IGRA-negative ****P < 0.0001