Fig. 2

Results of the primary IVW analysis. A The volcano plot illustrates the link between 196 gut microbiota and periodontitis risk. The X-axis represents the beta-value, the Y-axis represents the logarithmic p-value with a base of 10, P < 0.05 is considered as statistically significant. Red and green star points represent the risk and protective microbiota genera for periodontitis, respectively. B The lollipop plot further depicts six statistically significant gut microbiota genera by p-value rank, the size of the points represents the number of SNPs, and the color of the points represents the beta-value. CI confidence interval, IVW inverse-variance weighted, OR odds ratio; SNP single nucleotide polymorphism