Background Cognitive impairment (CI) is one of the most feared and debilitating
complications of PD. No therapy has been shown to slow or prevent CI in PD. Objective To …

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

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

The impact of Parkinson's disease on quality of life may vary depending on age at onset. We
investigated the effect of age at onset on quality of life in a large Parkinson's disease …

Background Cognitive impairment is a common and devastating manifestation in
Parkinson's disease (PD). We aimed to identify modifiable risk factors for PD with cognitive …

Background Parkinson's disease (PD) is multi‐symptom disease with variable progression.
Objectives We performed a longitudinal study to address the evolution of motor symptoms …

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

Background Anxiety and depression are common non‐motor symptoms in Parkinson's
disease (PD) but remain under‐recognized and under‐treated. Objectives To evaluate …

Introduction Younger age of onset and mild cognitive impairment (MCI) are both
independently associated with poorer quality of life (QOL) in Parkinson's disease (PD) …

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