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Table 3 Risk factors for reversion

From: Tuberculosis screening at the Sainte-Anne Hospital in Paris – results of first and second IGRA

 

QFT reversion

  

Reason for examination

N

%

OR

95% CI

General OH exam

26

48.1

1

--

 Pre-employment

20

26.7

0.3

0.1 – 0.9

 Contact tracing

7

46.7

1.3

0.4 – 4.6

Time between the QFT

    

 <3 months

28

45.9

2.3

1.2 – 6.8

 3+ months

25

30.1

1

--

Concentration of first QFT

    

 0.35- < 0.7 IU/ml

20

55.6

4.6

1.6 – 13.4

 0.7- < 1.0 IU/ml

9

30.6

2.2

0.7 – 7.5

 1.0- < 3.0 IU/ml

15

39.5

2.4

0.8 – 7.1

 3.0+ IU/ml

9

20.0

1

--

TST in history

    

10 + mm

23

31.9

1

 

<10mm

17

60.7

4.4

1.6 – 12.2

Unknown, not performed

13

29.5

1.3

0.5 – 3.2