Table 3 Comparison of QFT-G and TST results in TB patients and controls with origin from country with intermediate or high TB incidence (n = 150).
TB-patients* n = 52 | Controls n = 98 | Positive predictive value | Negative predictive value | |
|---|---|---|---|---|
QFT-G positive | 33 | 10 | ||
QFT-G negative | 16 | 86 | 76.7% | 84.3% |
QFT-G indeterminate | 3 | 2 | ||
TST ≥ 10 mm | 31 | 39 | ||
TST <10 mm | 3 | 46 | 44.3% | 93.9% |
TST not performed | 18 | 13 |