You are viewing the site in preview mode

Skip to main content

Advertisement

Table 2 Diagnosis of Mtb infection by culture method and QFTGIT at various cut-off values of the level of INFγ (IU/ml) in HIV-seronegative study participants (n = 107)

From: Performance of QuantiFERON-TB Gold In-Tube (QFTGIT) for the diagnosis of Mycobacterium tuberculosis (Mtb) infection in Afar Pastoralists, Ethiopia

   Culture method Diagnostic performance
QFTGIT/cut-off value (IU/ml)   Number of positive Number of negative Sensitivity (%) Specificity (%)
≥ 0.35* Number of positive 20 48 64.5 36.8
  Number of negative 11 28   
≥ 0.2 Number of positive 21 54 67.7 28.9
  Number of negative 10 22   
≥ 0.1 Number of positive 24 58 77.4 23.7
  Number of negative 7 18   
  1. *Manufacturer's recommended cut-off value.