Development and Validation of the Parkinson's Disease Specific Anxiety Inventory (PDSAI)

Area of Science:

• Neuroscience
• Psychiatry
• Clinical Psychology

Background:

• Anxiety is frequently overlooked and undertreated in Parkinson's disease (PD) patients.
• There is a need for specialized tools to address anxiety specific to PD.
• Current assessment methods may not fully capture PD-related anxiety nuances.

Purpose of the Study:

• To develop and validate a novel screening and research tool, the Parkinson's disease Specific Anxiety Inventory (PDSAI).
• To identify anxiety triggers and manifestations unique to individuals with PD.
• To establish PDSAI's reliability and validity for clinical and research use.

Main Methods:

• The PDSAI was administered to 172 individuals with PD in Australia and the United States.
• Reliability was assessed using Cronbach's alpha and split-half methods.
• Concurrent validity was evaluated by comparing PDSAI scores with established anxiety scales (Hamilton Anxiety Scale, Liebowitz Social Anxiety Scale, Parkinson's Anxiety Scale).

Main Results:

• The PDSAI demonstrated high internal consistency (Cronbach's alpha = 0.93) and acceptable split-half reliability (0.68).
• Significant concurrent validity was found between PDSAI and other anxiety measures (r = 0.51 to 0.747).
• Low rates of missing data across its 40 items indicate good participant engagement.

Conclusions:

• The Parkinson's disease Specific Anxiety Inventory (PDSAI) is a reliable and valid instrument.
• PDSAI effectively captures anxiety triggers and manifestations specific to Parkinson's disease.
• This tool can aid in better recognition and management of anxiety in PD populations.