Apathy dimensions in Parkinson's disease

Area of Science:

• Neuroscience
• Psychiatry
• Clinical Psychology

Background:

• Apathy is a significant and debilitating symptom in Parkinson's disease (PD).
• The multidimensional nature of apathy in PD requires further investigation.
• Understanding apathy's specific dimensions is crucial for effective management.

Purpose of the Study:

• To evaluate the psychometric properties of the Dimensional Apathy Scale (DAS) in Parkinson's disease patients.
• To explore the multidimensional apathy profile in individuals with PD.
• To establish the validity and reliability of the DAS as an assessment tool for apathy in PD.

Main Methods:

• A cohort of 34 PD patients and 34 healthy controls participated.
• Informants/carers (30 for each group) also completed apathy assessments.
• Participants completed the DAS, Apathy Evaluation Scale, and Geriatric Depression Scale Short Form.

Main Results:

• PD patients self-reported significantly higher apathy in executive and initiation dimensions compared to controls.
• Informant ratings indicated significantly higher executive apathy in PD patients versus controls.
• Apathy dimensions were associated with impaired daily living activities but not motor disability.

Conclusions:

• The Dimensional Apathy Scale (DAS) is a valid and reliable instrument for assessing multidimensional apathy in Parkinson's disease.
• Parkinson's disease is characterized by an executive apathy profile, as perceived by caregivers, and also involves initiation apathy reported by patients.
• These findings highlight a lack of motivation in planning, organization, attention, and initiation, warranting further research into cognitive underpinnings and clinical impact.