Furthermore, this study found that the area under the curve of DC, DRs, and AC combined with Lp-PLA2 was 0.970 (95%CI: 0.923–0.992) and 0.940 (95%CI: 0.882–0.974), indicating that DC, DRs, AC combined with Lp-PLA2 had higher diagnostic value for dementia. Here, PLA2G7 is linked to dementia.