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Table 2 Distribution of QuantiFERON-TB Gold In tube test results in non-smokers and smokers respectively in Danish and Tanzanian TB patients

From: Negative effect of smoking on the performance of the QuantiFERON TB gold in tube test

  Danish patients (n = 34) Tanzanian patients (n = 172)
  Non-smokers (n = 14) Smokers (n = 20) p Non-smokers (n = 150) Smokers (n = 22) p
Positive, n (%) 12 (86) 10 (50) 0.03 112 (75) 11 (48) 0.01
Negative, n (%) 0 (0) 9 (45) 0.004 16 (11) 6 (26) 0.04
Indeterminate, n (%) 2 (14) 1 (5) 0.56 21 (14) 6 (26) 0.14
  1. Distribution of QFT and IP-10 results for non-smokers and smokers respectively compared by chi square test. Each outcome was tested against the pooled proportion of the other possible outcomes. QFT: QuantiFERON-TB Gold In tube test.