Table 3. Positivity of QFT-IT, IP-10 and TST in healthy adult subjects.

Tests	N	Pos	Neg	Indt	% of Spec
QFT-IT	100	45	55	0	55
IP-10	100	52	48	0	48
TST	94	23	71	0	75.5

10 mm cut-off point was used for TST.

QFT-IT - QuantiFERON-TB Gold.

IP-10 - Interferon gamma inducible protein-10.

TST - Tuberculin skin test.

N - Number of subjects.

Pos - Positive.

Neg - Negative.

Indt - Indeterminate.

% Spec - Percentage of specificity, calculated after excluding indeterminate results.