GFAP and Lewy body dementia: Patients with DLB displayed lower levels of plasma Aβ ratio (P = 0.037, d = 0.576) and higher p-tau181 (P = 0.017, d = 0.644) and a tendency to higher GFAP levels (P = 0.057, d = 0.057), compared to NC, after adjustment for age and sex.