The positive and negative likelihood ratios were 3.2 and 0.20, respectively.
The prevalence of TB in this population was 15% (pre-test probability).
The sensitivity of the QFT-GIT was 85% (95% confidence interval (CI) 0.73–0.92) and specificity was 73.3% (95% CI 0.68–0.78).
The positive predictive value was 39.5% and the negative predictive value was 97.3%.
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