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Table 6 Results of multivariable logistic GEE regression analysis for the presence of TB sequelae on chest X-rays vs. normal chest X-rays at inclusion*

From: Agreement between QuantiFERON®-TB Gold In-Tube and the tuberculin skin test and predictors of positive test results in Warao Amerindian pediatric tuberculosis contacts

TB sequelae on CXR Odds ratio 95% CI p-value
IFN-γ level, IU/ml** 1.05 1.0-1.1 0.049
TST induration diameter, mm 0.95 0.84-1.08 0.44
Age, years 1.3 1.0-1.6 0.029
Sex, male vs. female 1.8 1.0-3.0 0.034
Malnourished 0.39 0.15-1.0 0.055
BCG vaccination 2.7 1.2-6.4 0.020
Duration of exposure, ≥12 h/day vs. <12 h/day 0.90 0.55-1.5 0.69
  1. *Individuals who had active TB, indeterminate QFT-GIT results and those in whom a CXR and/or QFT-GIT was not performed (n = 33) were excluded from this analysis. A total of 55/130 remaining household contacts had radiological features of TB sequelae. Of these, 34 had calcifications as the lone abnormality.
  2. **The level of IFN-γ (IU/ml) in the QFT TB antigen-stimulated plasma sample with that for the negative control subtracted.