Estimate of the prevalence of latent tuberculosis using different approaches
| Test considered | Estimated rate % (95% CI) |
| Only TST positive | 18.8 (14.9–22.7) |
| Only QFT-GIT positive | 13.2 (9.8–16.5) |
| QFT-GIT and TST positive | 9.9 (6.9–12.8) |
| QFT-GIT among TST positive | 9.9 (6.9–12.8) |
| At least one positive test | 22.1 (18–26.2) |
CI: confidence interval; TST: tuberculin skin test; QFT-GIT: QuantiFERON®-TB Gold in-tube (Cellestis Limited, Carnegie, Australia).