Median IFN-γ U/ml in all three Quantiferon TB Gold In-Tube tubes in children and adults.

Comparison of median IFN-γ values in the three QFT tubes in children and adults according to diagnostic TB classificaiton. There were significantly lower levels* (p<0.05) in all subgroups of children compared to adults, except in the positive control where median levels in children with confirmed and not TB were not significantly different to levels in adults.
Wilcoxon’s rank-sum test used to test difference between median IFN-γ in children and adults.
IQR: interquartile range.