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. Author manuscript; available in PMC: 2019 May 11.
Published in final edited form as: Vaccine. 2018 Apr 11;36(20):2768–2773. doi: 10.1016/j.vaccine.2018.04.011

Figure 1. Effect of Placebo on Antigen-Specific Memory B Cell Percentages at 90 Days, Effect of Vaccination at 90 and 180 Days, and Effect of V. cholerae Challenge at 180 Days.

Figure 1

Note that for the LPS-specific IgG results on Day 180, the nonparametric 95% confidence interval on the median overlaps one even though the signed-rank test of statistical significance produced a p-value less than 0.05 because the signed-rank test assesses both the direction and magnitude of changes over time and provides greater statistical power.