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Table 2 Agreement between TST and QuantiFERON®TB Gold for different cut-off values of TST

From: Screening for tuberculosis infection among newly arrived asylum seekers: Comparison of QuantiFERON®TB Gold with tuberculin skin test

TST QFT TST cut-off ≥ 6 mm TST cut-off ≥ 10 mm TST cut-off ≥ 15 mm
   No. (%) No. (%) No. (%)
Positive Positive 232 (25) 190 (21) 104 (11)
Negative Negative 420 (46) 527 (58) 611 (67)
Positive Negative 228 (25) 121 (13) 37 (4)
Negative Positive 32 (4) 74 (8) 160 (18)
Total agreement 652 (72) 717 (79) 715 (78)
Kappa (95% CI) 0.43 (0.37 – 0.49) 0.51 (0.45 – 0.57) 0.39 (0.32 – 0.47)
  1. Agreement between tuberculin skin test and QuantiFERON®TB Gold among 912 newly arrived asylum seekers in Norway Sept. 19. 2005 – June 12. 2006 by different cut-off values of tuberculin skin test indurations.