From: Feasibility, acceptability, and cost of tuberculosis testing by whole-blood interferon-gamma assay
 | Homeless Clinics (n = 2) | TB Clinic | Immigrant & Refugee (n = 2) | Methadone Clinic | Total |
---|---|---|---|---|---|
IGRA Result | n (%) | n (%) | n (%) | n (%) | N (%) |
Positive | 411 (16) | 213 (33) | 164 (34) | 31 (17) | 819 (21) |
Negative | 2148 (82) | 419 (64) | 303 (63) | 140 (76) | 3010 (77) |
Indeterminate | 41 (2) | 21 (3) | 14 (3) | 13 (7) | 89 (2) |
Total tested | 2600 | 642 | 481 | 184 | 3918 |