Fig. 1

Children with no periodontal risk markers and a family history of hyperlipidaemia have lower oral microbial diversity. Samples were rarefied to 5000 sequences and alpha diversity was measured using faith’s phylogenetic diversity (A, C) and microbial richness (observed ASVs; B, D) for children without (blue; A, B) and with (red; C, D) periodontal risk markers. Within each analysis, diversity was compared between children without (light) and with (dark) a family history of hyperlipidaemia. *p < 0.05