Table 3

Multivariable analysis: influence of age in days at completion of primary immunisations, IgG response (μg/ml) to primary immunisations, and age (days) at receipt of fourth dose on IgG response to a fourth dose of Hib

Age at third doseIgG after third doseAge at fourth dose
95% CI, 95% confidence interval.
% Change in IgG titre per unit change in variable+0.1%+71.6%+0.4%
95% CI−0.8% to +1.0%+35.2% to +100%−0.02% to +0.9%
p Value0.77< 0.0010.061