DOCK3 and dementia: A Mantel correlation test between influential species and clinical parameters showed a significant association between Fecalibacterium prausnitzii and MoCA (r2 = 0.46, p = 0.02) in the dementia group (Supplementary Figure 3A), while Prevotella copri with AG/UAG ratio (r2 = 0.4, p = 0.01), and Bifidobacterium longum with MMSE (r2 = 0.53, p = 0.03) in the control group (Supplementary Figure 3B).