Among all participants, there was not a significant difference in median production of IFN-gamma between Tube TB.1 [median 0.01 IU/mL (IQR, 0–1.85)] and Tube TB.2 [median 0.02 IU/mL (IQR, 0–3.010–3.01; Supplemental Table S9). This evidence concerns the gene IFNG and tuberculosis.