Comparison of prevalence of nasopharyngeal carriage of any pneumococcal carriage (Any type), vaccine serotypes (VT), non-vaccine serotypes (NVT) and serotypes 6A and 19A in different cross-sectional surveys in wholly vaccinated villages.

aIt was not possible to fit the model. OR's were calculated ignoring clustering and p-values using Fisher's exact test.bValues could not be calculated.

a：无法拟合该模型。计算比值比（Odds Ratio，OR）时未考虑聚类效应，P值则通过费希尔精确检验（Fisher's exact test）计算得到。b：无法计算相关数值。