Advanced-Stage Parkinson's Disease: From Identification to Characterization Using a Nationwide Database

Area of Science:

• Neurology
• Pharmacology
• Health Services Research

Background:

• Parkinson's disease (PD) progression leads to decreased medication response and motor complications.
• Current methods for identifying patients needing intervention are often inadequate.
• Intensified therapy (IT) for PD is proposed as a proxy for increased disease burden.

Purpose of the Study:

• To determine if intensified therapy (IT) aligns with events reflecting advanced Parkinson's disease (APD) burden.
• To explore the utility of IT as an indicator of advanced PD.

Main Methods:

• Retrospective analysis of Parkinson's disease (PD) patients in Israel.
• Defined intensified therapy (IT) cohort (n=2037) based on levodopa dosage and frequency.
• Compared IT cohort with non-intensified therapy (NIT) cohort (n=3402) on demographics, comorbidities, healthcare use, costs, and clinical events.

Main Results:

• Intensified therapy (IT) was linked to significantly higher healthcare resource use (P<0.05).
• IT patients incurred greater healthcare costs (P<0.001).
• IT was associated with increased risk of mortality, hospitalization, disability, and device-aided therapy (P<0.001 for all).

Conclusions:

• Treatment intensity serves as an objective and robust indicator of advanced Parkinson's disease (APD).
• This easily extractable marker can be integrated into electronic medical records.
• IT can help actively target advanced PD patients and guide risk-appropriate care.