Do Amyloid Cerebral Deposits Influence the Long-Term Poststroke Cognitive Outcome?: The IDEA3 Study

Area of Science:

• Neurology
• Neuroimaging
• Geriatrics

Background:

• Amyloid deposits are linked to severe baseline cognitive status in stroke patients.
• The long-term impact of amyloid on cognitive outcomes post-stroke requires further investigation.

Purpose of the Study:

• To assess the 5-year cognitive outcome in stroke patients based on amyloid positron emission tomography (PET) status.

Main Methods:

• Longitudinal study of 91 stroke patients with florbetapir PET data.
• Annual cognitive assessments and clinical evaluations for 5 years post-stroke.
• Primary outcome: incident dementia; secondary outcomes: cognitive impairment and modified Rankin Scale score.

Main Results:

• Amyloid PET-positive patients had a significantly higher incidence of dementia (OR, 9.6) and cognitive impairment (OR, 10).
• This association remained significant after adjusting for multiple confounding factors.
• PET positivity was linked to an elevated overall risk of dementia (OR, 6) and cognitive impairment (OR, 6.25) at follow-up.

Conclusions:

• Amyloid deposition significantly impacts stroke outcomes, increasing the risk of cognitive impairment and dementia.
• Comprehensive etiological workup is essential for patients experiencing post-stroke cognitive decline.