Table 5 Old, active, and predicted TB by TST and IGRA results
From: Screening for tuberculosis and prediction of disease in Portuguese healthcare workers
TST | IGRA | Total | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
0-9 mm | ≥ 10 mm | Neg. | Pos. | |||||||
TB history | n | % | n | % | n | % | N | % | n | %* |
Old TB | 8 | 14.0 | 49 | 86.0 | 23 | 40.4 | 34 | 59.6 | 57 | 2.0 |
Prevalent active TB | 0 | -- | 8 | 0.4* | 0 | -- | 8 | 0.8* | 8 | 0.3 |
Predicted TB** | 0 | -- | 4 | 0.2* | 0 | -- | 4 | 0.4* | 4 | 0.1 |
No TB | 774 | 27.5 | 2102 | 72.9 | 1908 | 67.8 | 953 | 32.8 | 2815 | 97.6 |