Fig. 3From: Factors associated with the composition of the gut microbiome in patients with established rheumatoid arthritis and its value for predicting treatment responsesCorrelation between age and gut microbiome composition in RA patients and healthy participants. Participants were divided into young (< 45 years) and senior (≥ 45 years). A α-Diversity (shown as Chao1, Shannon index, and Simpson’s index) based on Bray–Curtis OTUs data. B PCoA (left), RDA (middle), and CCA (right) plots at the OTU level. C LEfSe revealed specific microbes at the OTU levelBack to article page