MAPT and Alzheimer disease: As expected, there was greater tau and Aβ %AO in these neocortical regions in LBD+AD versus LBD−AD [average cortical ln‐%AO for tau: β = −3.6, SE = 0.95, t‐value = −3.7, P < 0.01; average cortical ln‐%AO for Aβ: β = −4.2, SE = 1.3, t‐value = −3.2, P < 0.01].