Table 4—

Estimate of the prevalence of latent tuberculosis using different approaches

Test consideredEstimated rate % (95% CI)
Only TST positive18.8 (14.9–22.7)
Only QFT-GIT positive13.2 (9.8–16.5)
QFT-GIT and TST positive9.9 (6.9–12.8)
QFT-GIT among TST positive9.9 (6.9–12.8)
At least one positive test22.1 (18–26.2)
  • CI: confidence interval; TST: tuberculin skin test; QFT-GIT: QuantiFERON®-TB Gold in-tube (Cellestis Limited, Carnegie, Australia).