Table 2 Comparison of tuberculin skin test (TST), QuantiFERON-TB Gold (QFG), and T-SPOT.TB in all the patients, in patients with past or current tuberculosis (TB) or previous positive tuberculin skin test (TST) and in patients with no past or current TB nor treatment for LTBI with and without TB contact
Test | Patients | Results of Test | |||
|---|---|---|---|---|---|
Positive | Borderline | Negative | Indeterminate or invalid | ||
TST | All patients (n = 373) | 46 (12.3) | - | 299 (80.2) | 28 (7.5) |
Patients with past or current TB or positive TST (n = 71) | 26 (36.6) | - | 42 (59.2) | 3 (4.2) | |
Patients with no past or current TB nor positive TST without TB contact (n = 209) | 7 (3.3) | 188 (90.0) | 14 (6.7) | ||
Patients with no past or current TB nor positive TST with TB contact (n = 93) | 13 (14.0) | - | 69 (74.2) | 11 (11.8) | |
QFG | All patients (n = 373) | 28 (7.5) | - | 335 (89.8) | 10 (2.7) |
Patients with past or current TB or positive TST (n = 71) | 15 (21.1) | - | 56 (78.9) | 0 (0) | |
Patients with no past or current TB nor positive TST without TB contact (n = 209) | 6 (2.9) | 198 (94.7) | 5 (2.4) | ||
Patients with no past or current TB nor positive TST with TB contact (n = 93) | 7 (7.5) | - | 81 (87.1) | 5 (2.4) | |
T-SPOT.TB (Mc) | All patients (n = 373) | 69 (18.5) | - | 278 (74.5) | 26 (7.0) |
Patients with past or current TB or positive TST (n = 71) | 27 (38.0) | - | 40 (56.3) | 4 (5.6) | |
Patients with no past or current TB nor positive TST with TB contact (n = 209) | 28 (13.4) | 166 (74.4) | 15 (7.2) | ||
Patients with no past or current TB nor positive TST with TB contact (n = 93) | 14 (15.1) | - | 72 (77.4) | 7 (7.5) | |
T-SPOT.TB (FDAc) | All patients (n = 373) | 50 (13.4) | 27 (7.2) | 270 (72.4) | 26 (7.0) |
Patients with past or current TB or positive TST (n = 71) | 22 (31.0) | 7 (9.9) | 38 (53.5) | 4 (5.6) | |
Patients with no past or current TB nor positive TST without TB contact (n = 209) | 20 (9.6) | 12 (5.7) | 162 (77.5) | 15 (7.2) | |
Patients with no past or current TB nor positive TST with TB contact (n = 93) | 8 (8.6) | 8 (8.6) | 70 (72.9) | 7 (7.5) | |