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Effect of Extrapyramidal Signs and Lewy Bodies on Survival in Patients With Alzheimer Disease
Mary N. Haan, MPH, DrPH;
William J. Jagust, MD;
Douglas Galasko, MD;
Jeffrey Kaye, MD
Arch Neurol. 2002;59:588-593.
Background Patients with Alzheimer disease (AD) who have psychiatric and parkinsonian
symptoms experience faster cognitive deterioration and shorter survival vs
those without such disease features. Extrapyramidal signs (EPSs) in particular
have been associated with the presence of Lewy bodies (LBs) on autopsy and
with poorer survival in patients with AD. Lewy bodies found at autopsy are
not always correlated with EPSs during late life.
Objective To determine whether the association between LBs and age at death is
modified by the presence of EPSs, hallucinations, or delusions.
Design An autopsy series of patients with clinically diagnosed AD.
Settings Three AD clinics (San Diego and Sacramento, Calif, and Portland, Ore).
Patients Data on 379 patients with a clinical diagnosis of AD who were initially
assessed between May 1, 1984, and August 1, 1996, and who were autopsied between
January 1, 1990, and April 1, 1998, were pooled from 3 AD centers.
Main Outcome Measures Presence of LBs on autopsy and differences in age at death in those
with EPSs, LBs, or both.
Results Individuals with EPSs at initial assessment were more than 3 times as
likely to have LBs at autopsy than were those without EPSs. Age at death was
younger in those with LBs and EPSs than in those with LBs only and those without
EPSs or LBs.
Conclusions The presence of EPSs in patients with AD indicates worse prognosis and
may be related to underlying LBs. The presence of EPSs is a strong predictor
of LBs.
From the Department of Epidemiology, University of Michigan, School
of Public Health, Ann Arbor (Dr Haan); the Department of Neurology, University
of California, School of Medicine, Davis (Dr Jagust) and San Diego (Dr Galasko);
and the Department of Neurology, Oregon Health Sciences University, and Portland
Veterans Affairs Medical Center, Portland (Dr Kaye).
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