We collected data for analysis during the 3-year period between October 1, 2001, and September 30, 2004. For each patient in the sample, we obtained the following information from the administrative database: dates of all outpatient encounters; specialty of clinics visited (movement disorders clinic vs. general neurology clinic vs. non-neurology clinic); all instances of administrative ICD-9-CM codes assigned for conditions closely related to PD; and dates of prescriptions of medications related to PD [levodopa (L-dopa) in any formulation, pramipexole, ropinirole, pergolide, entacapone, and selegiline].
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Parkinson's Disease Data Analysis
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Corresponding Organization : VA Greater Los Angeles Healthcare System
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Variable analysis
independent variables
- Specialty of clinics visited (movement disorders clinic vs. general neurology clinic vs. non-neurology clinic)
- Dates of all outpatient encounters
- All instances of administrative ICD-9-CM codes assigned for conditions closely related to PD
- Dates of prescriptions of medications related to PD [levodopa (L-dopa) in any formulation, pramipexole, ropinirole, pergolide, entacapone, and selegiline]
- 3-year period between October 1, 2001, and September 30, 2004
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