Adjusted prevalence of latent tuberculosis infection (LTBI) and age-specific log odds ratios for Bacillus Calmette–Guérin vaccination and exposure to a smear-positive/culture-positive index case or smear-negative/culture-positive index case, Lima, Peru, 2009–2012. Solid lines in each panel are point estimates; dashed lines are 95% confidence intervals. Confidence intervals are interpreted over the entire age range, that is, the highest value is the upper limit in the trend by age. A) Adjusted age-specific prevalence of latent tuberculosis infection among persons exposed to a smear-negative/culture-negative index case who have not received Bacillus Calmette–Guérin vaccination (the age-specific intercept). B) Age-specific log odds ratios of tuberculin skin test–positivity associated with Bacillus Calmette–Guérin vaccination, relative to the baseline prevalence in A. C–D) Age-specific log odds ratios for smear-negative/culture-positive index case and smear-positive/culture-positive index case exposure relative to the age-specific intercept (A). Dotted lines in B–D are provided as a guide for assessing statistical significance, which is assessed in terms of the difference in predicted prevalence from the age-specific intercept.