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Table 1 Univariate and multivariate analyses of the determinants of rubella IgG seropositivity at study enrollment

From: Immunity to rubella: an Italian retrospective cohort study

DeterminantUnivariate logistic regressionMultivariate logistic regression
OR95%CIaOR95%CI
Sex
 • female1.01.0
 • male0.5(0.4–0.7)0.5(0.4–0.7)
Age at enrollment (years)0.95(0.90–1.01)  
Age at the time of first MMR vaccine
 • < 2 years1.01.0
 • ≥2 years1.7(1.2–2.4)1.5(0.9–2.4)
Age at the time of second MMR vaccine (years)1.05(1.00–1.10)0.96(0.89–1.04)
Time from the first to the second vaccine during the basal cycle (years)0.99(0.96–1.04)  
Time from the first MMR vaccine to the measurement of the antibody titer (years)0.93(0.89–0.97)0.99(0.93–1.06)
Time from the second MMR vaccine to the measurement of the antibody titer (years)0.90(0.85–0.95)0.89(0.80–0.99)
  1. Chi-squared = 811.4; p = 0.785
  2. OR odds ratio, CI confidence interval