Factors Associated with a Positive Interferon-Gamma Release Assay (IGRA) Result in 741 Participants^*.

BCG, Bacille-Calmette Guérin; CI, confidence interval; HIV, human immunodeficiency virus; IDU, injection drug users. OR, odds ratio; TB, tuberculosis *Excluding 31 subjects with indeterminate interferon-gamma release assay result. †Adjusted for age, sex, HIV risk factor, CD4 cell counts and a past history of TB disease. ‡Test for trend for age: OR 1.03, 95% CI 1.01–1.06, p = 0.02 (adjusted for sex, HIV risk factor, CD4+ T cell count and past TB disease). Factors Associated with a Positive Interferon-Gamma Release Assay (IGRA) Result in 741 Participants*.