Table 3

Pneumonia hospitalisation incidence rate in vaccinated and unvaccinated groups

PYsNo. of subjects with pneumonia hospitalisationNo. of pneumonia hospitalisationsIR95% CI
With PPSV23705.98365273.6653.64 to 93.68
Without PPSV231375.00105162117.8299.68 to 135.96
Total2080.98141214102.8489.06 to 116.61
  • IR, incidence rate, calculated as the ratio of the number of pneumonia hospitalisations per 1000 PYs of follow-up; PPSV23, 23-valent pneumococcal polysaccharide vaccine; PY, person-year.