Signature OTUs associated with diabetic and non-diabetic samples.

Within the periodontitis-negative and periodontitis-positive sample groups, the listed OTUs were significantly either more or less abundant in diabetes-positive samples than in diabetes-negative samples, as indicated by the rows. The three columns indicate whether each OTU was significantly enriched in periodontitis-negative samples, periodontitis-positive samples, or neither, as found in the comparisons shown in Table 1.