Table 2

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

Lin et al. BMC Pediatrics 2005 5:43   doi:10.1186/1471-2431-5-43

Open Data