Ann Intern Med -- Pai et al. 0 (2008): 0000605-200808050-00241 Figure 2

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Figure 2. Forest plot of studies estimating specificity of interferon- ${gamma}$ release assays in populations at very low risk for latent tuberculous infection.

Point estimates for specificity and 95% CIs are shown along with pooled estimates. Top. QuantiFERON-TB Gold and QuantiFERON-TB Gold In-Tube (BCG non-vaccinated; 8 studies). Middle. QuantiFERON-TB Gold and QuantiFERON-TB Gold In-Tube (BCG vaccinated; 8 studies). Bottom. T-SPOT.TB (predominantly BCG vaccinated; 6 studies).