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. 2021 Dec 7;11:752475. doi: 10.3389/fcimb.2021.752475

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Copyright © 2021 Chen, Chen, Huang, Duan, Gao and Gao

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Beta diversity analysis of the salivary microbial samples. (A) Principal Coordinates Analysis (PCoA) calculated by the relative abundance of OTUs. Salivary microbial samples were divided into four categories. OSA-P, OSA/periodontitis; OSA-nP, OSA/non-periodontitis; nOSA-P, non-OSA/periodontitis; nOSA-nP, non-OSA/non-periodontitis. The communities of the four categories had the tendency to cluster apart from each other. (B) The average weighted UniFrac distance value of the OSA group is slightly higher than the non-OSA group.