Fig. 1

Data clustering and comparison between saliva and tissue DNA methylation profiles. a) Hierarchical clustering based on correlation distances of methylation profiles in 20 samples – intestinal mucosa and saliva samples from 10 individuals; b) Pearson correlation coefficients for methylation levels of saliva vs tissue for each of the CpG sites (positive correlations in boxed area with statistically significant correlations (adjusted P < 0.05) shown in red bars); c) The distribution of cg-probes plotted against the difference in methylation expressed as Δβ-values