Figure 3. Relationship between individual quantitative IFN-γ results (IU/ml) and the sputum bacillary load expressed as (A) smear grade (p = 0.64), (B) liquid culture results (p = 0.83), and (C) time-to-positivity (TTP) of the liquid culture (R² = 0.00082, p = 0.82), measured in the active pulmonary tuberculosis patients with interpretable IFN-γ results (indeterminate excluded).

Short bars, median level of QFT-GIT response in each group. Abbreviations: IFN-γ: interferon-γ.