Univariate correlation between clinical variables and relative IgG avidity of antibodies to the live M. tuberculosis surface or to whole cell lysate in patients with active TB disease (n = 40).

*P-value calculated using one-way ANOVA for categorical variables with >2 categories, students t-test for categorical variables with 2 categories and F-statistic for continuous variables. Welch’s correction was applied to the student’s t-test when variances were not equal between groups. All p-values are unadjusted for multiple comparisons.