CD4 and tuberculosis: Interestingly, the proportion of CD4+ T cells was similar in TB and non-TB subjects in the blood (median[IQR] = 26[21–32] for TB and 22[15–27] for non-TB) but there was a significantly lower CD4∶CD8 ratio in TB patients (median = 1.6 for TB and 2.7 for non-TB; p = 0.0192) due to a higher (but not significant) proportion of CD8+ T cells (median[IQR] = 16[11–24] for TB and 8.4[4.8–17] for non-TB; Table 2).