Table 2.

Frequency and Adjusted Odds ratios (OR) and 95% Confidence Interval (95%CI) for Covariates associated with QFT-IT Results.

	QFT-IT
Characteristics	negative N (%)	positive N (%)	Odds Ratio	95% CI
Gender**
female	182 (92.9%)	14 (7.1)	1
male	64 (92.8)	5 (7.2)	1.3	0.4–4.2
Age*
>30 years	111 (96.5)	4 (3.5)	1
30–40 years	39 (95.1)	2 (4.9)	1.2	0.2–7.0
40–50 years	64 (94.1)	4 (5.9)	1.5	0.4–6.5
50–67 years	32 (78.0)	9 (22.0)	7.7	2.1–28.2
Country of birth**
Germany	198 (92.5)	16 (7.5)	1
foreign born	48 (94.1)	3 (5.9)	0.9	0,2–3,3
Job Category*
other professions	147 (95.5)	7 (4.5)	1
physician/nurse	99 (89.2)	12 (10.8)	3.2*	1.1–9.0
BCG vaccination**
no	114 (91.2)	11 (8.8)	1
yes	132 (94.3)	8 (5.7)	0.5	0.2–1.3
TST history*
negative TST in history	146 (96.7)	5 (3.3)	1
no TST in medical history	29 (87.9)	4 (12.1)	4.4	1.01–18.9
positive TST in history	71 (87.7)	10 (12.3)	3.0	0.95–9.6
Workplace**
other	124 (90.5)	13 (9.5)	1
admission ward	16 (88.9)	2 (11.1)	1,4	0.3–79.2
infection ward/pulmology	106 (96.4)	4 (3.6)	0,4	0.1–1.3

* the final multivariate logistic regression model contains the variable age, job category and TST history.

** adjusted Odds ratio for age, job category and TST history.