Fig. 1
From: Natural IgG antibodies to β amyloid are decreased in patients with Parkinson’s disease

Serum levels of antibody to amyloid Aβ in 15 aged non-demented controls and 31 patients with dementia diagnosed as being of vascular origin (VaD); antibody levels did not differ between these groups. VaD cases could be subdivided in two subgroups, i.e. 14 with high (median 71.1) and 17 with low (median 6.8) antibody levels. VaD high patients had significantly more antibody to Aβ than old age controls (p = 0.047)