Proportion of indeterminate results of IGRAs in HIV-infected patients in four systematic reviews.

NOTE: Stratification for high-burden and low-burden TB settings is roughly equivalent to low-income and high-income settings used by Cattamanchi [10], Metcalfe [11] and Chen [12] in their systematic reviews; TB = tuberculosis; LTBI = latent tuberculosis infection; QFT-GIT = QuantiFERON Gold® In-Tube; N.D. = Not done.*Only patients screened for LTBI included;†Symptomatic patients, with and without active TB.