Serum homocysteine showed potential association with cognition and abnormal gut microbiome in major depressive disorder

Figure 2 The beta diversity indices between healthy controls and major depressive disorder groups. The beta diversity distance matrix is displayed using principal coordinate analysis graphs to compare the sample distribution between healthy controls and major depressive disorder groups. Green squares and red points represent major depressive disorder patients and healthy controls, respectively. PCoA: Principal co-ordinates analysis; PC1: Principal component 1; PC2: Principal component 2; MDD: Major depressive disorder; HC: Healthy control.