Table 2.

Performance of QFT-IT and TST

Tests	Number of subjects, % (95% CI)
	Positive	Negative	Indeterminate	Net positive
QFT-IT	38 (31–45)	53 (46–60)	9 (5–13)	42 (34–50)
IP-10	45 (38–52)	50 (42–58)	5 (2–8)	47 (39–55)
TST (5mm)	19 (13–25)	81 (75–87)	NA	NA
TST (10mm)	15 (10–20)	85 (80–90)	NA	NA

Net positivity was calculated by excluding the indeterminate results from the analysis.

QFT-IT - QuantiFERON TB-Gold in-tube

IP-10 – Interferon gamma inducible protein-10

TST- Tuberculin Skin test

CI – Confidence interval