http://onlinelibrary.wiley.com/doi/10.1111/ijs.12092/abstract;jsessionid=0E5963A7C116206580A8B7B1D091A4B5.d01t04
Rationale
About
20% of stroke patients develop dementia within a few months after their
event, but the determinants and mechanisms of poststroke dementia are
insufficiently understood.
Aims
To identify and characterize the determinants of cognitive impairment poststroke.
Design
Observational
prospective study in patients with acute stroke and no prior dementia.
Six hundred subjects will be characterized by detailed interview,
standardized clinical examinations, biometric measures (intima-media
thickness, waist-hip ratio, and ankle-brachial index), multimodal
imaging (magnetic resonance imaging, fluorodeoxyglucose-positron
emission tomography (FDG-PET), amyloid-positron emission tomography
(amyloid-PET), and retinal imaging), analysis of biomarkers derived from
blood and cerebrospinal fluid, and detailed cognitive testing at repeat
time points. Patients will be followed for five-years with a total of
five personal visits and three telephone interviews.
Study Outcomes
Primary
end-point is the occurrence of poststroke dementia. Secondary
end-points include poststroke cognitive impairment–no dementia, stroke
recurrence, and death. Predictive factors for poststroke dementia will
be identified by multiple Cox proportional-hazards model.
Results
Baseline
characteristics of the first 71 patients (study inclusion between May
2011 and August 2012) are as follows: median age, 70 years
(interquartile range, 65–75); female gender, 25 (35%); median National
Institutes of Health Stroke Scale at admission, 2 (1–4); and etiological
stroke subtypes according to TOAST classification, 15% large artery
disease, 18% small vessel disease, 35% cardioembolic, and 32%
undetermined or multiple competing etiologies.
Discussion
This
study will provide insights into the mechanisms of poststroke dementia
and hold the potential to identify novel diagnostic markers and targets
for preventive therapies. The study is registered at http://www.clinicaltrials.gov (NCT01334749) and will be extended as a multicenter study starting 2013.
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