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Table 3 Agreement between the results of tuberculin skin testing with those for the Quantiferon®-TB Gold in-tube assay

From: Value of the tuberculin skin testing and of an interferon-gamma release assay in haemodialysis patients after exposure to M. tuberculosis

   

TST-1

Overall TST

negative

positive

Total

negative

positive

Total

QFT

negative

n

34

0

34

32

2

34

  

(%)

65.4%

0%

65.4%

61.5%

3.8%

65.4%

positive

n

15

3

18

9

9

18

 

(%)

28.8%

5.8%

34.6%

17.3%

17.3%

34.6%

Total

n

49

3

52

41

11

52

 

(%)

94.2%

5.8%

100%

78.8%

21.2%

100%

kappa value

  

0.21

  

0.49

 
  1. TST-1: Tuberculin skin test result in the first-step testing.
  2. Overall TST: Tuberculin skin test result after TST-1 and second-step testing (15 days after first testing).
  3. QFT: Quantiferon®-TB Gold in-tube assay.