Background Cognitive deficits can be present in the prodromal phase of Parkinson's disease
(PD). Subjective cognitive decline (SCD) may contribute to identifying individuals with …

ABSTRACT Background Neuropsychiatric symptoms in Parkinson's disease (PD) may
increase dementia (PDD) risk. The predictive value of these symptoms, however, has not …

Although other nonmotor phenomena representing possible prodromal symptoms of
Parkinson's disease have been described in some detail, the occurrence and characteristics …

The impact of Parkinson's disease (PD) dementia is substantial and has major functional
and socioeconomic consequences. Early prediction of future cognitive impairment would …

This study was undertaken to determine the prevalence and correlates of cognitive
impairment (CI) and neuropsychiatric symptoms (NPS) in early, untreated patients with …

Objective The objective of this study was to determine the frequency and impact of
subjective cognitive complaint (SCC) in Parkinson's disease (PD) patients with normal …

Abstract Background Subjective cognitive complaints (SCCs) in Parkinson's disease (PD)
are reported frequently, but their prevalence and association with changes on objective …

Previous research has documented cognitive impairment in the early stages of Parkinson's
disease (PD). It is not known when this decline starts or if decline progresses at an …

Background Identification and characterization of Parkinson's disease (PD) in its prodromal
stage is crucial. Objective The objective of this study was to investigate the association …

Background Prospective data on cognition in prodromal Parkinson's disease are limited.
The objectives of this study were to assess in prodromal PD (1) if baseline cognition predicts …