Similarly, among those with CSF t-tau/Aβ42 not consistent with AD, race had no effect on CSF α-synuclein levels [implicated in Lewy body disease; F(2,75) = 1.078; p = 0.303] or p/t-tau ratio [implicated in frontotemporal lobar degeneration with TDP-43 immunoreactive inclusions; F(2,75) = 0.775; p = 0.382]. This evidence concerns the gene TARDBP and Alzheimer disease.