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Stroke and Parkinson's disease.

R L Levine¹, J C Jones, N Bee

¹Department of Neurology, Middleton Veterans Affairs Hospital, Madison, Wis.

|June 1, 1992

Summary

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This study found Parkinson's disease patients in a veteran population did not show a decreased incidence of ischemic stroke. Unlike previous findings, this research did not confirm a protective effect of Parkinson's disease against stroke.

Area of Science:

Neurology
Cardiovascular Science
Epidemiology

Background:

Previous research suggested a lower incidence of stroke and atherosclerotic disease in Parkinson's disease patients.
This observation prompted further investigation into potential protective effects of Parkinson's disease.

Purpose of the Study:

To investigate whether Parkinson's disease patients in a veteran population exhibit a reduced incidence of stroke and atherosclerotic disease.
To compare the prevalence of stroke risk factors between Parkinson's disease patients and a control group.

Main Methods:

Retrospective case-control study of 119 Parkinson's disease patients and 238 age/sex-matched controls.
Data collection included incidence of ischemic stroke, myocardial ischemia, and various stroke risk factors.

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Controls were selected from non-Parkinson's disease discharges without stroke or myocardial infarction as the primary diagnosis.

Main Results:

No significant difference in the cumulative incidence of ischemic stroke, hypertension, or diabetes mellitus between Parkinson's disease patients and controls.
Parkinson's disease patients had a higher prevalence of dementia and congestive heart failure.
Controls showed higher prevalence of myocardial infarction, coronary artery disease, tobacco use, atrial fibrillation, cancer, and ethanol abuse.

Conclusions:

The study did not find evidence that Parkinson's disease patients in a veteran population are protected from ischemic stroke.
Findings contrast with prior reports suggesting a potential protective role of Parkinson's disease against cardiovascular events.