Figure 1. Proportion of positive Tuberculin Skin Tests (TST) and Quantiferon Gold In Tube Tests (QFT), stratified by age and mother's HIV status.

A. Proportion of positive TST and QFTs among children ≤60 months, stratified by age-category. There is a negative trend in TST positivity with increasing age, chi-square test for trend p=0.014. The trend of QFT positivity and age was not statistically significant, chi-square test for trend p=0.576. B. Proportion of positive QFTs, stratified by a HIV-status of mother. Children had a higher proportion of positive QFTs for all age-categories, though this was not statistically significant for any age-categories. C. Proportion of positive TSTs, stratified by age and mother's HIV-status. Children born to HIV-infected mothers had a higher prevalence of TST positivity in the 24-35 month age-category (p=0.013) and the 36-60 month age group (p=0.001) compared to the children born to HIV-uninfected mothers in the same age-group. A positive TST is defined as induration ≥10mm.