Firstly, for dementia status (Table 4), there was a significant positive relationship with CD68 (P < 0.001), MSR-A (P = 0.010) and CD64 (P = 0.007) and a significant negative relationship with Iba1 (P < 0.001); no significant association was observed with HLA-DR. This evidence concerns the gene FCGR1A and dementia.