Performance of the tuberculin skin test and interferon-γ release assay for detection of tuberculosis infection in immunocompromised patients in a BCG-vaccinated population

Table 2 Results of the TST and QFT-IT in 211 participants who underwent evaluation for tuberculosis infection

Assay result	All participants n= 211	Immunocompetent n= 94	Immunocompromised n= 117
TST
Positive*	38 (18)	26 (27.7)	12 (10.3)
Negative	173 (82)	68 (72.3)	105 (89.7)
QFT-IT
Positive†	49 (23.2)	24 (25.5)	25 (21.4)
Negative	128 (60.7)	61 (64.9)	67 (57.3)
Indeterminate‡	34 (16.1)	9 (9.6)	25 (21.4)

Data are presented as numbers (percentages) unless otherwise indicated.
QFT-IT, QuantiFERON-TB Gold In-Tube; TST, tuberculin skin test.
*p 0.001 for the difference in the number of positive TST results between the groups.
†p 0.068 for the difference of QFT-IT results between the groups.
‡p 0.021 for the difference in the proportion of indeterminate QFT-IT results between the groups.

ISSN: 1471-2334