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. Author manuscript; available in PMC: 2013 Apr 1.
Published in final edited form as: J Allergy Clin Immunol. 2008 Oct 25;123(1):195–200. doi: 10.1016/j.jaci.2008.09.021

FIG 2.

FIG 2

Results from multivariable logistic regression analysis of antibody response as a function of preimmunization titer adjusted for age, sex, and IgG level. The data shown represent the odds ratio of a 4-fold or greater increase in antibody titer as a function of the absolute preimmunization titer, starting at the lower limit of 1.3 μg/mL. As the absolute preimmunization titer value increases, the odds ratio of a 4-fold or greater response approaches zero for all serotypes. The solid line represents the mean value, and the dashed lines represent the 95% CIs.