Screening for latent tuberculosis in Norwegian health care workers: high frequency of discordant tuberculin skin test positive and interferon-gamma release assay negative results

Table 2 Characteristics of HCW with positive or indeterminate QuantiFERON-TB

HCW	Age	Sex	1. QFT (IU/ml)	Origin	Occupation	BCG	TST ≥ 6	2. QFT (IU/ml)
1	22	F	4.51	Norway	Laboratory	no	yes	9.51
2	35	F	0.57	Norway	Laboratory	yes	yes	−0.05
3	26	F	0.66	Norway	Laboratory	yes	yes	−0.01
4	41	F	0.40	Asia	Laboratory	yes	yes	0.49¹
5	34	M	0.76	Norway	Laboratory	yes	no	0.93¹
6	32	F	IND	Norway	Laboratory	yes	yes	0.05
7	24	F	1.60	Norway	Nurse	yes	yes	1.09
8	59	F	0.47	Norway	Nurse	yes	²	0.49
9	39	F	0.39	Norway	Secretary	yes	yes	−0.01
10	44	F	0.40	W. Europe	Physician	yes	yes	²
11	46	M	1.09	Norway	Physician	yes	yes	1.36
12	29	M	0.46	Norway	Physician	yes	no	−0.14
13	54	M	2.31	Norway	Physician	yes	yes	2.66
14	44	M	1.66	N. America	Physician	no	yes	²
15	28	M	IND	Norway	Nurse	yes	yes	neg
16	25	F	7.90	Africa	Nurse	yes	no	pos³
17	60	F	5.85	Asia	Nurse	yes	yes	4.15
18	60	F	0.68	Norway	Assistant	yes	yes	neg³
19	65	F	1.31	Norway	Nurse	yes	yes	2.17
20	33	M	5.51	Norway	Physician	yes	yes	>10

¹Third QFT, second test 0.30 UI/ml in both HCW 4 and 5. ²No test was performed. ³No value was given.
QFT = QuantiFERON-TB. IND = indeterminate.

ISSN: 1471-2458