Fig. 4: Alpha diversity of samples, by collection method and over time.
From: Assessing saliva microbiome collection and processing methods
a Alpha diversity measures based on Faith PD and Pielou evenness by sample collection with preservative (P) or not (No P). Lines connecting points indicate sample pairs. **p < 0.01, ***p < 0.001; linear mixed effects model. Center line on plots indicates median. b Absolute value of the differences in alpha diversity between all unrelated subjects (pink circles), and longitudinal samples within the same subject (gray circles). *p < 0.05, **p < 0.01; Kruskal–Wallis test.
