Table 3. Results of 2nd QFT depending on INF-γ concentration in first QFT.

1st QFT	2nd QFT
	Negative		Positive		Total
	N	%	N	%	N	%
<0.1 IU/ml	596	97.4	16	2.6	612	74.9
0.1-<0.2 IU/ml	78	97.5	2	2.5	80	9.8
0.2-<0.35 IU/ml	47	94.0	3	6,0	50	6,1
Neg. 1st QFT	721	97.1	21	2.9	742	90.8
0.35-<0.5 IU/ml	11	64.7	6	35.3	17	2.1
0.5-<0.7 IU/ml	5	50.0	5	50	10	1.2
0.7-1.0 IU/ml	2	40.0	3	60.0	5	0.6
>1–3 IU/ml	9	37.5	15	62.5	24	2.9
>3 IU/ml	1	5.2	18	94.7	19	2.3
Pos. 1st QFT	28	37.3	47	62.7	75	9.2
All	749	91.7	68	8.3	817	100.0