Table 2 Univariate and multivariate Cox semiparametric regression analysis of risk predictors of rubella IgG protective antibody survival
From: Immunity to rubella: an Italian retrospective cohort study
Determinant | Univariate Cox regression | Multivariate Cox regression modela | ||
|---|---|---|---|---|
HR | 95%CI | aHR | 95%CI | |
Sex | ||||
• female | 1.0 | – | 1.0 | – |
• male | 1.8 | (1.3–2.4) | 1.7 | (1.2–2.3) |
Age at enrollment (years) | 0.96 | (0.90–1.02) | ||
Age at the time of first MMR vaccine | ||||
• <2 years | 1.0 | – | ||
• ≥2 years | 1.04 | (0.74–1.47) | ||
Age at the time of second MMR vaccine (years) | 1.2 | (1.1–1.3) | ||