Comparison of the prevalence of pneumococcal nasopharyngeal carriage of VT serotypes, NVT serotypes, and any pneumococcal serotype between pre-vaccination CSS and each of the post-vaccination CSSs in vaccinated and control villages.

Estimates were made using a mixed effects logistic regression model combining data from all CSSs, adjusted by age (within each age group), with village included as a random effect. VT includes the seven serotypes included in the vaccine and serotype 6A. NVT includes all other pneumococcal serotypes.aPaired sign test used to compare prevalence in study CSS, as the OR = 0 and could not be tested using logistic regression.