Figure 3

Treatment effect on OTU composition. Change (%) in geometric means of relative abundance and corresponding P-values derived from linear mixed models of treatment effect i.e. alkaline versus neutral water. Prevalence indicates number of participants in which a given OTU is present in at least one sample. Abundance indicates mean relative abundance of a given OTU in baseline samples. Taxonomy of OTUs [Greengenes ID] is given at the lowest classified rank. Only OTUs with P ≤ 0.05 are annotated.