Table 3.

a. Agreement between TST and IFN-γ
Test Results	5mm	10mm
Positive TST/Positive QFT-IT	27	25
Negative TST/Negative QFT-IT	106	110
Positive TST/Negative QFT-IT	6	2
Negative TST/Positive QFT-IT	41	43
Agreement %	73.9%	75%
k (95% CI)	0.38 (0.23–0.53)	0.40 (0.24–0.55)

b. Agreement between TST and IP-10
Test Results	5mm	10mm
Positive TST/Positive IP-10	25	22
Negative TST/Negative IP-10	89	91
Positive TST/Negative IP-10	5	3
Negative TST/Positive IP-10	51	54
Agreement %	67.1	66.5
k (95% CI)	0.29 (0.14–0.44)	0.28 (0.12–0.43)

c. Agreement between IFN-γ and IP-10
Tests		IP-10
QFT-IT		Positive	Negative	Total
	Positive	56	8	64
	Negative	20	86	106
	Total	76	94	170
Agreement %			83.5
K (95% CI)			0.66 (0.55–0.78)

QFT-IT - QuantiFERON TB-Gold in-tube

IP-10 – Interferon gamma inducible protein-10

TST- Tuberculin Skin test

CI – Confidence interval

k – kappa

% - Percentage