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Table 1 Clinical and demographic characteristics of study subjects.

From: Host markers in Quantiferon supernatants differentiate active TB from latent TB infection: preliminary report

  All Pulmonary TB Household contacts
Number of participants 57 23 34
Age, mean yr ± SD 31.2 ± 13.9 30.3 ± 13.6 31.8 ± 14.2
Age range, yr 10.1 – 59.9 10.1 – 57.4 10.7 – 59.9
Male/female ratio 31/26 17/6 14/20
TST mean, mm na nd 22.8
TST range, mm na na 0.0–46.0
TST pos*, % na na 87.5
QFT pos, % 82.5 95.6 73.5
  1. QFT = QuantiFERON TB Gold In Tube, TB = active tuberculosis, TST = tuberculin skin test, yr = years, SD = standard deviation, na = not applicable, nd = not done, * = Two household contacts did not return for TST reading.