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Table 4 Agreement between TST (at two cut-offs) and QFT-GIT assay results stratified by BCG scar status

From: Diagnosis of latent tuberculosis infection in healthy young adults in a country with high tuberculosis burden and BCG vaccination at birth

Status of BCG scar TST (mm) QFT-GIT Pos QFT-GIT Neg Kappa p value
BCG scar present ≥10 21 5 0.71 0.000
  <10 2 20   
BCG scar absent ≥10 23 1 0.93 0.000
  <10 1 34   
Total ≥10 44 6 0.83 0.000
  <10 3 54   
BCG scar present >5 22 7 0.67 0.000
  <5 1 18   
BCG scar absent >5 24 1 0.97 0.000
  <5 0 34   
Total >5 46 8 0.83 0.000
  <5 1 52   
  1. TST: Tuberculin Skin Test; QFT-GIT: QuantiFERON®-TB Gold In-Tube; Pos: Positive; Neg: Negative.