Incidence rate ratios (IRR) comparing incidence of pneumonia in the prevaccine, heptavalent (PCV-7) and 13-valent (PCV-13) vaccination eras
| IRR | SE | 95% CI | ||
|---|---|---|---|---|
| PCV-7 versus prevaccine era | ||||
| All ages | 1.08* | 1.02 | 1.03 | 1.13 |
| Infants | 0.87* | 1.06 | 0.78 | 0.96 |
| 1–4 years | 1.01 | 1.03 | 0.95 | 1.07 |
| 5–9 years | 1.18* | 1.05 | 1.07 | 1.29 |
| 10–14 years | 1.16* | 1.07 | 1.02 | 1.32 |
| PCV-13 versus PCV-7 era | ||||
| All ages | 0.93* | 1.02 | 0.89 | 0.97 |
| Infants | 0.94 | 1.06 | 0.84 | 1.04 |
| 1–4 years | 0.88* | 1.03 | 0.83 | 0.93 |
| 5–9 years | 0.90* | 1.05 | 0.82 | 0.99 |
| 10–14 years | 0.98 | 1.07 | 0.87 | 1.11 |
*p<0.05.