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Table 5 Pneumococcal vaccination status and relative risk (RR) of mortality in patients aged 65 years and over

From: The impact and effectiveness of pneumococcal vaccination in Scotland for those aged 65 and over during winter 2003/2004

Group Total no. in group % Died RR Mortality (95% CI) Crude RR (95% CI) adjusted for age group and gender NNV§ to prevent 1 death
All age 65+ years      
   No vaccine 82 32.9 1.00 1.00 14,810
   Vaccine 63 28.6 0.86 (0.47, 1.56) 0.89 (0.49, 1.63)  
Age group (years)      
   65–74      
No vaccine 27 22.2 1.00 - 39,172
Vaccine 25 16.0 0.71 (0.20, 2.51)   
   75+      
No vaccine 55 38.2 1.00 - 8,122
Vaccine 38 36.8 0.96 (0.49, 1.89)   
Gender      
   Males      
No vaccine 31 32.3 1.00 -  
Vaccine 34 29.4 0.90 (0.38, 2.17)   
   Females      
No vaccine 51 33.3 1.00 -  
Vaccine 29 27.6 0.81 (0.35, 1.89)   
  1. § NNV: Number needed to vaccinate to prevent 1 death. Note: since the reduction in mortality risk was not significant, these are hypothetical estimates included only for comparison purposes.