Table 3.

Agreement between QFT-IT, IP-10 and TST

Groups	κ value	95% CI	Agreement
QFT-IT vs TST	0.490	0.304 to 0.675	Moderate
QFT-IT vs IP-10	0.556	0.397 to 0.715	Moderate
IP-10 vs TST	0.259	0.047 to 0.471	Fair

The strength of agreement between the tests was calculated using kappa statistics. <0.2 – poor; 0.2–0.4 – Fair; 0.4–0.6 - moderate; 0.6–0.8 – good; >0.8 – excellent.

QFT-IT - QuantiFERON-Gold in tube

IFN-γ - Interferon gamma

IP-10 - Interferon gamma inducible protein-10

TST - Tuberculin skin test

CI - Confidence of Interval