Search Results: Displaying all Sensitivity & Specificity of QFT (1)

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Why is it important to have a test with high specificity? 2013 Specificity is defined as the probability that the test indicates an individual does not have the disease, or infection, when in fact they are disease free. QFT has been shown to have > 99% specificity compared to lower than 70% for the TST in some settings. In many countries, targeted testing policies are in place to screen individuals who are at increased risk of having LTBI. Without high specificity in these situations there will often be more false positive than true positive results, and most people treated with latent TB drugs will be receiving drugs they do not need, with the potential for adverse side-effects from unnecessary therapy. Additionally this wastes valuable resources (and funds) following up individuals who do not need treatment.

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