TABLE 4.

VE Adjusted According to Household Structure Variables and Stratified According to Age

Age 6–23 moAge 24–59 moAll Ages
OR or VE95% CIOR or VE95% CIOR or VE95% CI
OR
    Either parent ≤24 y of age6.83.1 to 15.02.20.8–6.04.42.4–7.9
    Any “other” household member2.51.2 to 5.41.90.7–5.22.31.3–4.1
    Any sibling 6–11 y of age2.21.2 to 4.31.10.6–2.01.50.9–2.3
VE, %
    Pertussis vaccine dose 146.0−147 to 88.295.841.1–99.774.614.3–92.5
    Pertussis vaccine dose 279.624.6 to 94.599.488.7–99.990.772.0–96.9
    Pertussis vaccine dose 391.774.5 to 97.398.586.6–99.895.187.8–98.1
    Pertussis vaccine dose 496.486.4 to 99.099.394.8–99.997.594.1–98.9
    Pertussis vaccine dose 5100100
  • Analyses included 167 case subjects and 808 control subjects.