News Release

Development of dementia in Parkinson’s patients

Associated with up to a three-fold increase in mortality

Peer-Reviewed Publication

American Academy of Neurology

DENVER, CO – Independent of disease severity, as measured by signs of Parkinson’s disease found on examination (including tremor, stiffness, slowness and gait impairment), mortality may be two to three times higher among Parkinson’s disease patients who develop dementia than those who don’t. At today’s Annual Meeting of the American Academy of Neurology, researchers released findings of their study of 180 Parkinson’s disease patients, designed to investigate the independent effects of dementia and Parkinson’s severity on patient mortality. “Previous studies had shown dementia to be associated with reduced survival among Parkinson’s disease patients,” said study author Karen Marder, M.D., of Columbia University. “However we were unsure whether reduced survival was due to the fact that individuals with dementia were also the most severely affected in terms of the motor signs of Parkinson’s disease.”

This study, supported by the National Instititutes of Health and the Parkinson’s Disease Foundation, also revealed that patients who died during the four-year follow-up period were significantly older and had a higher Parkinson’s severity at baseline evaluation than those who were still living. Adjusting for age, gender, education and duration of disease, both incident dementia and disease severity were each independently associated with an increased risk of death.

The risk of mortality associated with incident dementia was between two and three-fold. This risk was unchanged after adjusting for the development of hallucinations or depression.

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The American Academy of Neurology, an association of more than 18,000 neurologists and neuroscience professionals, is dedicated to improving patient care through education and research.

Editors Note: Dr. Karen Marder will present the research at the American Academy of Neurology’s 54th Annual Meeting in Denver Colo., during a platform presentation on Thursday, April 18, 2002, at 1:30 a.m. in Room A 207/9 at the Colorado Convention Center. She will be available to answer media questions during a briefing on Thursday, April 18, 2002 from 9:00 a.m. – 10:00 a.m. in the AAN Media Room, Lobby C, Room 208 of the Colorado Convention Center.


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