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Table 2 TST diameter by IGRA results

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

  QFT
  Negative Positive Total
TST N Row% N Row% N Col%
0-9 mm 46 90.2 5 9.8 51 34.5
10-14 mm 25 80.2 6 19.4 31 20.9
15-19 mm 19 67.9 9 32.1 28 18.9
20-40 mm 30 78.9 8 21.1 38 25.7
All 120 81.1 28 18.9 148 100.0
  1. P-value for trend: 0.081
  2. TST = Tuberculin Skin Test
  3. QFT = Quantiferon TB Gold in tube
  4. Row% = Row-Percent
  5. Col% = Column-Percent