Fig. 1From: Prevalence of latent tuberculosis infection among foreign students in Lübeck, Germany tested with QuantiFERON-TB Gold In-Tube and QuantiFERON-TB Gold PlusVariables associated with positive QFT-Plus. The variables were analyzed using logistic regression models to identify independent variables associated with a positive QFT-Plus result. * Countries with an annual TB incidence of ≥125:100,000Back to article page