CD4 and tuberculosis: We found that the independent factors associated with positive T-Spot.TB results were older age (adjusted odds ratio [AOR], per 10-year increase, 1.172; 95% confidence interval [CI], 1.022–1.344, P = 0.023), past history of TB (AOR, 13.412; 95% CI, 6.106–29.460, P<0.001), and higher CD4 counts at enrollment (AOR, per 50-cell/μl increase, 1.062; 95% CI, 1.017–1.109, P = 0.007) (Table 2).