Table 1. Clinical characteristics of the study participants.

	Active TB, (n = 18)	LTBI QFT high (n = 36)*	LTBI QFT borderline (n = 11)*	QFT negative (n = 16)
Age; median (range)	32 (18–62)	40 (13–67)	40 (25–53)	47 (16–68)
Sex; males/females	6/12	13/23	4/7	8/8
Origin; TB high/low endemic country	16/2	22/14	9/2	4/12

LTBI QFT borderline = 0.35–0.70 IU/ml. LTBI QFT high >0.70 IU/mL.

*In total, n = 48 QFT positive individuals with LTBI were included in the study, but for one them the exact value of the QFT-test was not known. This subject was therefore excluded from the subgroup analyses.