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Table 4 Kappa-values and QFT results for TST indicating recent LTBI and TST ≥ 10 mm

From: Evaluation of the tuberculin skin test and the interferon-γ release assay for TB screening in French healthcare workers

 

QFT

 

Negative

Positive

Total

 

Recent LTBI very probable

N (row%)

N (row%)

N (col%)

Kappa

   No

84 (81.6)

19 (18.4)

103 (69.6)

 

   Yes

36 (80.0)

9 (20.0)

45 (30.4)

0.02

TST ≥ 10 mm, regardless of earlier TST

    

   Negative

46 (90.2)

5 (9.8)

51 (34.5)

 

   Positive

74 (76.3)

23 (23.7)

97 (65.5)

0.11

  1. TST+/QFT- 74 (50% of all), TST-/QFT+ 5 (17.9% of all QFT+)