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Table 2 Association between results of Quantiferon TB-Gold in tube and risk factors for tuberculosis infection

From: Tuberculosis examination using whole blood interferon-gamma release assay among health care workers in a Japanese hospital without tuberculosis-specific wards

 

No of subjects

 

No of subjects

 

Cut off: 0.35 IU/mL

Cut off: 0.1 IU/mL

≥ 0.35

≤ 0.35

OR(95% CI)

≥ 0.1

≤ 0.1

OR(95% CI)

Male

10

50

2.4 (0.90 - 6.5, P = 0.12b)

15

45

1.2 (0.56 - 2.5, P = 0.7b)

Female

8

97

23

82

Job category

Nurse

6

66

1.0a

P = 0.18b

14

58

1.0a

P = 0.69b

Doctor

5

48

1.1

 

12

41

1.2

 

Laboratory*

3

9

3.7

 

4

8

2.1

 

Pharmacist

3

9

3.7

 

3

9

1.4

 

other**

1

15

0.73

 

5

11

1.9

 

age

        

20-29

2

24

1.0a

P = 0.76b

6

20

1.0a

P = 0.63b

30-39

10

60

2.0

 

17

53

1.1

 

40-49

4

38

1.3

 

7

35

0.67

 

50-

2

25

0.96

 

8

19

1.4

 

Length of working in health care industries

0-4

3

25

1.0a

P = 0.21b

6

22

1.0a

P = 0.87b

5-9

1

30

0.28

 

5

26

0.71

 

10-14

6

37

1.4

 

11

32

1.3

 

15-19

6

23

2.3

 

7

22

1.2

 

20-

2

32

0.52

 

9

25

1.3

 

History of contact investigation for TB

Yes

6

19

3.4 (1.1 - 10.0, P = 0.034b)

12

13

4.0 (1.66 - 9.9, P = 0.003b)

No

12

128

26

114

History of living with families who developed active TB

Yes

2

5

3.6 (0.64 - 20, P = 0.17b )

3

4

2.6 (0.56 - 12.0, P = 0.20b)

No

16

142

35

123

History of working in TB ward/OPD

Yes

1

13

0.61 (0.075 - 4.9, P = 1.0b)

3

11

0.90 (0.24 - 3.4, P = 1.0b)

No

17

134

35

116

  1. Note. OR, odds ratio; CI, confidence interval; TB, tuberculosis; OPD, outpatient department; * Laboratory technician ** radiography technicians, nutritionist, clerical, nursing assistants and social workers; areference; bFisher Exact test.