TABLE 3.

T-SPOT.TB, QFN-G-IT, and TST positive results in diagnosing LTBI regarding BCG vaccination status

Diagnostic testNo. (%) of positive results
Contact tracing studiesScreening for LTBI
Non-BCG-vaccinated subjects (n = 142)BCG-vaccinated subjects (n = 128)Non-BCG-vaccinated subjects (n = 178)BCG-vaccinated subjects (n = 136)
T-SPOT.TB67 (47.2)55 (43)73 (41)49 (36)
QFN-G-IT57 (40.1)41 (32)65 (36.5)46 (33.8)
TST89 (62.7)114 (89.1)121 (68)117 (86)