Table 3—

Comparison of the two interferon-γ assays and tuberculin skin test (TST) results in each group

Active TBLow risk for TB
Subjects n87131
TST+ ≥10 mm58 (66.7)28 (21.4)
QFT-G+61 (70.1)11 (8.4)#
SPOT+83 (96.6)¶,+20 (15.3)
  • Data are presented as n (%), unless otherwise stated. TB: tuberculosis; QFT-G: QuantiFERON-TB Gold test; SPOT: T-SPOT TB test. #: p<0.05, significant difference between TST positivity and QFT-G positivity; : p<0.05, significant difference between TST positivity and SPOT positivity; +: p<0.05, significant difference between QFT-G positivity and SPOT positivity.