Figure 1.
Study participation diagram.
Table 1.
Subject characteristics.
Table 2.
Summary comparisons of QuantiFERON-TB Gold In-Tube test interpretations performed on the same subjects in three labs.
Table 3.
Pairwise comparisons of QuantiFERON-TB Gold In-Tube test interpretations performed on the same subjects in three labs.
Table 4.
Median and mean IFN-γ measurements for QuantiFERON-TB Gold In-Tube tests performed on the same subjects in three labs.
Figure 2.
Difference (Bland-Altman) plots.
Difference (Bland-Altman) plots for Nil (panel A) and TB (panel B). Differences (y-axis) and means of pairs (x-axis) are in IU/mL IFN-γ.
Table 5.
Variability in Quantiferon-TB Gold in-Tube test measurements performed on the same subjects in three labs excluding those with extremely high TB Response.
Table 6.
W-S SD, bias, and LOA in three strata based on the mean TB Response for Lab1, Lab2, and Lab3.