Table 3.
Discordance of QTF and TST results in each group, excluding patients with indeterminate QTF results
| RA-TNF1 (n = 36) | RA-TNF2 (n = 38) | TNF-naive RA (n = 39) |
TB (n = 28) |
LEPROSY (n = 22) |
Healthy controls (n = 41) | Total (n = 204) |
||
|---|---|---|---|---|---|---|---|---|
| QTF (+) | TST (+) | 5 (13%) | 9 (24%) | 15 (38%) | 12 (40%) | 12 (52%) | 16 (39%) | 69 (34%) |
| TST (-) | 8 (21%) | 7 (18%) | 5 (13%) | 3 (10%) | 2 (9%) | 3 (7%) | 28 (14%) | |
| QTF (-) | TST (+) | 4 (11%) | 5 (13%) | 6 (15%) | 3 (10%) | 1 (4%) | 12 (29%) | 31 (15%) |
| TST (-) | 19 (50%) | 17 (45%) | 13 (33%) | 10 (33%) | 7 (30%) | 10 (24%) | 76 (36%) |
Tuberculin skin test (TST) positivity is defined as an induration of ≥ 10 mm.