Table 2 

PCV introduction and probability of being uptodate at 13 months 

Contrast a: PCV adoption vs. predicted baseline 
Contrast b: PCV routine vs. predicted baseline 



Group 
Odds ratio 
95% CI 
Fitted probability 
Predicted probability 
Odds ratio 
95% CI 
Fitted probability 
Predicted probability 


Group A 
1.0 
0.5 – 1.8 
0.95 
0.95 
0.8 
0.4 – 1.4 
0.94 
0.95 
Group B 
0.5 
0.2 – 1.2 
0.96 
0.98 
0.7 
0.3 – 1.5 
0.97 
0.98 
Group C 
0.5 
0.4 – 0.8 
0.92 
0.95 
0.5 
0.3 – 0.8 
0.93 
0.96 
Group D 
1.2 
0.5 – 2.9 
0.90 
0.89 
2.0 
0.6 – 7.0 
0.94 
0.88 


Contrast a compares a child's probability of being uptodate at 13 months among the February 2000 birth cohort to that predicted from the prePCV baseline trend. Contrast b compares a child's probability of being uptodate at 13 months among the July 2000 birth cohort to that predicted from the prePCV baseline trend. For each contrast, the "fitted probability" was the probability of being uptodate as fitted from the multivariate regression models based on the observed data and the "predicted probability" was extrapolated from the prePCV baseline trend. 

Lin et al. BMC Pediatrics 2005 5:43 doi:10.1186/14712431543 