Integrating GPS and Accelerometry to Capture Life-Space Mobility in Parkinson's Disease

Area of Science:

• Gerontology
• Neurology
• Rehabilitation Science

Background:

• Life-space mobility (LSM) is crucial for independent living and participation.
• Parkinson's disease (PD) can significantly impact LSM due to physical and social changes.
• Understanding LSM in PD is vital for maintaining quality of life.

Purpose of the Study:

• To investigate LSM in individuals with mild-to-moderate PD.
• To compare self-reported and objective measures of LSM.
• To examine the relationship between LSM, physical activity, and quality of life in PD.

Main Methods:

• Participants (n=11) with mild-to-moderate PD completed the Life-Space Assessment (LSA).
• Objective data collected via accelerometer and GPS monitors over seven days.
• Analysis of GPS-derived LSM, physical activity, and sedentary behavior patterns.

Main Results:

• High self-reported LSM (median 82) contrasted with GPS-derived variability.
• Participants spent ~2/3 of wear time near home, predominantly sedentary.
• Moderate-to-vigorous physical activity and steps were higher when away from home.
• Weak associations found between self-reported quality of life and LSM.

Conclusions:

• Objective GPS measures provide complementary insights into location-specific activity and movement patterns in PD.
• Self-reported measures like LSA capture overall mobility but may not reflect detailed spatial behavior.
• Findings highlight the need for objective tools to fully assess LSM and guide interventions in PD.