Apathy rating scores and β-amyloidopathy in patients with Parkinson disease at risk for cognitive decline

To determine whether β-amyloidopathy correlates with apathy rating scores independently of mood changes and other neurodegenerative processes in Parkinson disease (PD).In this cross-sectional study, patients with PD (n = 64, 48 male and 16 female, mean age 69.2 ± 6.7 years, Hoehn & Yahr stage 2.7 ± 0.5, Montreal Cognitive Assessment score 25.3 ± 3.0) underwent [11C]Pittsburgh compound B β-amyloid, [11C]dihydrotetrabenazine vesicular monoamine...