Table 4.
Comparison of Mean Density of Pneumococcal Carriage in Infected Individuals During the 3 Postvaccination Cross-Sectional Surveys in Vaccinated and Control Villages, by Age at Sample Collection
| Age ≤ 5 Years |
Age > 5 Years |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Serotype Group | Control Villages | Vaccinated Villages | Difference | Differenceadja (95% CI) | P | Control Villages | Vaccinated Villages | Difference | Differenceadja (95% CI) | P | Pintb |
| VT | 1.94 | 2.43 | 0.49 | 0.53 (−0.03 to 1.08) | .060 | 1.78 | 1.78 | 0.00 | 0.15 (−0.24 to 0.54) | .435 | .102 |
| NVT | 2.04 | 2.07 | 0.03 | −0.09 (−0.61 to 0.44) | .738 | 1.74 | 1.91 | 0.17 | 0.17 (−0.01 to 0.35) | .062 | .582 |
| All | 1.99 | 2.11 | 0.12 | 0.13 (−0.34 to 0.60) | .579 | 1.75 | 1.88 | 0.13 | 0.13 (−0.04 to 0.30) | .135 | .981 |
Data are mean densities, expressed in arbitrary units, as defined in the Methods section.
Abbreviations: CI, confidence interval; NVT, non–vaccine-type pneumococci; VT, vaccine-type pneumococci.
a Adjusted for baseline density.
b P value for interaction between group (control or vaccinated) and age category.