Fig. 2

Box plot of OTU residuals (see the “Methods” section) significantly different between twins discordant for the Healthy Eating Index (HEI). Twins were characterised as healthy or less healthy relative to their co-twin if they were in differing HEI quantiles and their score differed by greater than 1 standard deviation (number of discordant twins pairs = 250). Of the 167 FDR-significant associations observed in mixed-effects models with the HEI, the 17 Qiime de novo derived operational taxonomic units (OTUs) presented here differed (FDR q < 0.05) between twin pairs in paired Wilcoxon rank-sum tests. X axis labels indicate the lowest taxonomic level assigned to each de novo OTU used in the analysis