Mild parkinsonian signs are associated with increased risk of dementia in a prospective, population‐based study of elders
Identifieur interne : 000644 ( Main/Exploration ); précédent : 000643; suivant : 000645Mild parkinsonian signs are associated with increased risk of dementia in a prospective, population‐based study of elders
Auteurs : Elan D. Louis [États-Unis] ; Ming X. Tang [États-Unis] ; Nicole Schupf [États-Unis]Source :
- Movement Disorders [ 0885-3185 ] ; 2010-01-30.
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Abstract
There is some evidence that mild parkinsonian signs (MPSs) are associated with increased risk of dementia, suggesting that MPS could be an early biomarker for dementia. Our aims, in a new cohort, were to determine whether (1) baseline MPS are a predictor of incident dementia and (2) there is an interaction between MPS and other baseline risk factors for dementia (i.e., the presence of both together greatly elevates the risk of dementia) was the objective. In a prospective, longitudinal study of community‐dwelling elders in northern Manhattan, NY, Parkinsonian signs were rated with an abbreviated Unified Parkinson's Disease Rating Scale. Risk of incident dementia was assessed using Cox proportional hazards models. There were 1,851 participants (mean follow‐up = 3.7 years). Participants with baseline MPS were twice as likely to develop dementia as participants without MPS: 16.3% versus 7.7%, unadjusted hazards ratio (HR) = 2.24 (P< 0.001), adjusted HR = 1.98 (P < 0.001). MPS were divided into three subtypes: adjusted HRaxial dysfunction = 2.45 (P < 0.001), adjusted HRtremor = 2.38 (P = 0.006), and adjusted HRrigidity = 1.16 (P = 0.58). When MPS were treated as a continuous variable, the adjusted HR = 1.15 (P = 0.001). There were no interactions between MPS and other baseline risk factors for dementia, including gender, education, race, family history of dementia, stroke, and apolipoprotein E‐e4. Baseline MPS seems to be a predictor of incident dementia. These motor signs might, therefore, serve as a useful biomarker for emerging dementia. © 2010 Movement Disorder Society
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DOI: 10.1002/mds.22943
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Disord.</title><idno type="ISSN">0885-3185</idno><idno type="eISSN">1531-8257</idno><imprint><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="2010-01-30">2010-01-30</date><biblScope unit="volume">25</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="172">172</biblScope><biblScope unit="page" to="178">178</biblScope></imprint><idno type="ISSN">0885-3185</idno></series><idno type="istex">8D1A7D2FBC959D7365D0C765854C30EFF04D0886</idno><idno type="DOI">10.1002/mds.22943</idno><idno type="ArticleID">MDS22943</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0885-3185</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Alzheimer's disease</term><term>elderly</term><term>epidemiology</term><term>incident dementia</term><term>mild parkinsonian signs</term><term>population</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">There is some evidence that mild parkinsonian signs (MPSs) are associated with increased risk of dementia, suggesting that MPS could be an early biomarker for dementia. Our aims, in a new cohort, were to determine whether (1) baseline MPS are a predictor of incident dementia and (2) there is an interaction between MPS and other baseline risk factors for dementia (i.e., the presence of both together greatly elevates the risk of dementia) was the objective. In a prospective, longitudinal study of community‐dwelling elders in northern Manhattan, NY, Parkinsonian signs were rated with an abbreviated Unified Parkinson's Disease Rating Scale. Risk of incident dementia was assessed using Cox proportional hazards models. There were 1,851 participants (mean follow‐up = 3.7 years). Participants with baseline MPS were twice as likely to develop dementia as participants without MPS: 16.3% versus 7.7%, unadjusted hazards ratio (HR) = 2.24 (P< 0.001), adjusted HR = 1.98 (P < 0.001). MPS were divided into three subtypes: adjusted HRaxial dysfunction = 2.45 (P < 0.001), adjusted HRtremor = 2.38 (P = 0.006), and adjusted HRrigidity = 1.16 (P = 0.58). When MPS were treated as a continuous variable, the adjusted HR = 1.15 (P = 0.001). There were no interactions between MPS and other baseline risk factors for dementia, including gender, education, race, family history of dementia, stroke, and apolipoprotein E‐e4. Baseline MPS seems to be a predictor of incident dementia. These motor signs might, therefore, serve as a useful biomarker for emerging dementia. © 2010 Movement Disorder Society</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>État de New York</li></region><settlement><li>New York</li></settlement><orgName><li>Université Columbia</li></orgName></list><tree><country name="États-Unis"><region name="État de New York"><name sortKey="Louis, Elan D" sort="Louis, Elan D" uniqKey="Louis E" first="Elan D." last="Louis">Elan D. Louis</name></region><name sortKey="Louis, Elan D" sort="Louis, Elan D" uniqKey="Louis E" first="Elan D." last="Louis">Elan D. 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