. 2021 Jan 16;97(5):500–507. doi: 10.1016/j.jped.2020.10.018

Table 3.

Effectiveness of maternal pertussis vaccination (Tdap) in reducing pertussis-like illness.

Variable	VE (CI 95%)^a	VE (CI 95%)^b
Maternal vaccination (Tdap)	27% (−34%, 60%)	19% (−64%, 60%)

V, vaccination effectiveness; CI, confidence interval.

Univariate.

Multivariate.