New model aims to forecast dementia risk in stroke survivors using genetics and brain imaging.

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Healthy Control Group: * Adults aged 19 years or older. * Able to be age- and sex-matched to the stroke cohort. * No history of stroke, transient ischemic attack (TIA), or other central nervous system disorders. * Cognitive function within the normal range for age and education level based on screening assessments (K-MMSE and K-MoCA). * Able to understand the study procedures and provide written informed consent. 2. Stroke Patient Group: * Adults aged 19 years or older. * First-ever ischemic or hemorrhagic stroke confirmed by CT or MRI. * Enrolled in one of the following strata according to time since stroke onset: Stratum A: 7 days to 3 months after stroke onset. Stratum B: \>3 months to 12 months after stroke onset. Stratum C: \>12 months to 36 months after stroke onset. \- Able to understand the study procedures and provide written informed consent, or consent provided by a legally authorized representative when applicable. Exclusion Criteria: 1. Healthy Control Group: * Current severe psychiatric disorders that may affect cognitive function (e.g., major depression, schizophrenia) or use of related medications. * Strong family history of hereditary cerebrovascular disorders (e.g., CADASIL). * Severe medical illness considered inappropriate for study participation. * Any condition that, in the opinion of the investigator, would make participation unsuitable. 2. Stroke Patient Group: * Impaired ability to provide consent (MMSE \<10) without an accompanying caregiver or legally authorized representative. * History of dementia due to causes other than stroke (e.g., Alzheimer's disease) prior to stroke onset. * History of major neurological disorders affecting cognition prior to stroke onset (e.g., Parkinson's disease, brain tumor, multiple sclerosis). * Severe aphasia or impaired consciousness preventing completion of cognitive assessments. * Current or pre-stroke severe psychiatric disorders that may affect cognitive function (e.g., major depression, schizophrenia) or use of related medications. * Strong family history of hereditary cerebrovascular disorders (e.g., CADASIL). * Contraindication to MRI (e.g., metallic implants) or refusal to provide blood samples for genomic analysis. * Any condition that, in the opinion of the investigator, would make participation unsuitable.