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Prevalence of Off Fluctuations and Quality-of-Life Impact
Off Fluctuations Prevalence:
- Approximately 40% of patients experience motor fluctuations after 4 to 6 years of levodopa therapy
- By 10 years of treatment, up to 90% of patients develop off episodes (Aradi 2020)
- Off periods increase in frequency and duration as disease progresses
- Early fluctuations may be end-of-dose wearing off, progressing to unpredictable on-off phenomena
Quality-of-Life Impact:
- Progressive deterioration in activities of daily living and independence
- Increased caregiver burden and health care utilization
- Significant psychological impact: anxiety, depression, social isolation
- Mobility limitations affecting employment, social interactions, and self-care
- Sleep disturbances and fatigue compound functional limitations