Longitudinal change of white matter abnormalities

Area of Science:

• Neurology
• Geriatrics
• Neuroimaging

Background:

• White matter hyperintensities (WMH) are common in aging and associated with cerebrovascular disease.
• Understanding WMH progression and its cognitive impact is crucial for elderly health.
• Previous studies often included individuals with pre-existing neuropsychiatric conditions.

Purpose of the Study:

• To investigate the rate and predictors of MRI-detected white matter hyperintensity progression.
• To examine the cognitive consequences of WMH progression in elderly individuals without neuropsychiatric disease.
• To provide longitudinal data on WMH changes in a healthy aging cohort.

Main Methods:

• Three-year follow-up of 273 participants (mean age 60 years) from the Austrian Stroke Prevention Study.
• Serial MRI scans to assess white matter hyperintensity progression (minor vs. marked).
• Analysis of clinical predictors (e.g., diastolic blood pressure) and neuropsychological test performance.

Main Results:

• WMH progression was observed in 17.9% of participants (minor: 9.9%, marked: 8.1%).
• Significant predictors of progression included diastolic blood pressure and baseline confluent WMH.
• WMH progression did not significantly influence the course of neuropsychological test performance over three years.

Conclusions:

• White matter hyperintensity progression is a notable finding in elderly individuals without neuropsychiatric disease.
• Diastolic blood pressure and baseline WMH severity are key predictors of progression.
• Despite WMH progression, cognitive function remained stable, indicating potential compensatory mechanisms.