IGRA (commercial or research assay) and TST results
| Positive IGRA | Positive TST | Total positive in either or both tests | |
| IGRA only | 10/94 | NA | 10/94 (10.6%) |
| TST and IGRA | 6/20 | 6/20 | 7/20* (35.0%) |
↵* All participants underwent research IGRA screening, of the 20 participants who also underwent TST, discordance occurred in two cases (one was positive who had a negative IGRA result and one was negative who had positive IGRA result).
IGRA, interferon-γ release assay; NA, not applicable; TST, tuberculin skin test.