This study is about understanding the costs and challenges faced by people with Parkinson's disease (PD) in Hong Kong. Parkinson's disease is a brain disorder that affects movement and balance, often causing falls. This study will look at how often falls happen, how severe the disease is, and how it affects daily life and healthcare costs. Participants will fill out surveys about their health and falls over a year. The study will not include any treatments or new medicine. The goal is to find out how much PD and falls cost individuals and the healthcare system, and how to make improvements.

• **Study Length**: 12 months, with check-ins at 6 and 12 months.
• **Participation**: No new treatments; involves filling out surveys.
• **Location**: Hong Kong residents with Parkinson's disease can join.