Antibody responses according to vaccine groups.

P: Pregnant.
NP: Non-pregnant.
GMT: Geometric mean titer.
GMR: Geometric mean ratio.
CI: Confidence interval.
Sero-protection: Titer ≥40.
Sero-conversion: Pre titer<10, Post titer ≥40.
Significant increase: Pre titer ≥10, Post titer 4 fold Pre titer.
Sero-conversion or significant increase: Percentage of total number of women in each vaccine group.
†At day 0 GMT were the same in all groups (ANOVA, p = 0.51).
‡The number of women with sero-protection did not differ in any of the groups compared over time (GEE).
*GMT at 3 weeks, 3 months and 10 months were adjusted for baseline titer.