Table 2 Positive and negative predictive values of QuantiFERON®-TB Gold results in patients with confirmed TB and patients with other final diagnoses.
All patients; n = 141 | ||||
|---|---|---|---|---|
Tuberculosis* n = 70 | Other final diagnosis* n = 71 | Positive predictive value | Negative predictive value | |
QFT-G positive | 41 | 16 | ||
QFT-G negative | 24 | 50 | 71.9% | 67.6% |
QFT-G indeterminate | 5 | 5 | ||
Suspected pulmonary TB; n = 104 | ||||
QFT-G positive | 22 | 14 | ||
QFT-G negative | 20 | 42 | 61.1% | 67.7% |
QFT-G indeterminate | 2 | 4 | ||
Suspected extrapulmonary TB; n = 37 | ||||
QFT-G positive | 19 | 2 | ||
QFT-G negative | 4 | 8 | 90.5% | 66.7% |
QFT-G indeterminate | 3 | 1 |