Table 3 Multivariate analysis of association between results of Quantiferon TB-Gold in tube and risk factors for tuberculosis infection

Male/ female

8.0

0.011

1.3

0.41

Job category

Nurse

1.0^a

1.0^a

Doctor

0.34

0.30

1.4

0.66

Laboratory technician

6.5

0.092

2.6

0.26

Pharmacist

4.9

0.096

1.7

0.51

Other*

1.5

0.76

2.9

0.13

Age

20-29

1.0^a

1.0^a

30-39

2.0

0.42

0.90

0.87

40-49

0.92

0.93

0.33

0.12

50-

0.23

0.26

0.83

0.78

History of contact investigation for TB

6.4

0.0077

4.7

0.0017

History of living with familes who developed active TB

6.0

0.11

3.3

0.24

History of working in TB ward/OPD

0.62

0.70

0.67

0.62