As shown in Figure 3B, the positive result rate of the IP-10 mRNA release assay was significantly higher than that of the QFT-GIT assay among TB/HIV co-infected patients with CD4+ T cell counts < 350 cells/μL (≤ 100 cells/μL: P = 0.015; 101-200 cells/μL: P = 0.047; 201-350cells/μL: P = 0.027). Here, CD4 is linked to tuberculosis.