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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.