From: Feasibility, acceptability, and cost of tuberculosis testing by whole-blood interferon-gamma assay
 | Homeless Clinic n (%) | Refugee Clinic n (%) | Total N (%) |
---|---|---|---|
Tested by TST or IGRA | 406 | 145 | 551 |
IGRA Ineligible* | 31 (8) | 17 (12) | 48 (9) |
IGRA eligible | 375 (100) | 128 (100) | 503 (100) |
   IGRA performed | 312 (83) | 113 (88) | 425 (84) |
   After lab time cut-off | 0 (0) | 5 (4) | 5 (1) |
   Phlebotomy refused | 30 (8) | 3 (2) | 33 (7) |
   Phlebotomy failed | 33 (9) | 7 (5) | 40 (8) |
TST attempted | 94 (100) | 32 (100) | 126 (100) |
   Returned for reading | 68 (72) | 32 (100) | 100 (79) |
Positive IGRA results | 53 (100) | 50 (100) | 103 (100) |
   Successfully evaluated** | 42 (79) | 34 (68) | 76 (74) |