Exploring cognitive reserve in multiple sclerosis: New findings from a cross-sectional study

Area of Science:

• Neuroscience
• Clinical Neurology
• Psychology

Background:

• The cognitive reserve (CR) hypothesis explains varied clinical outcomes in neurodegenerative diseases.
• The CR concept is increasingly applied to multiple sclerosis (MS) to understand cognitive performance.
• Investigating demographic and clinical factors influencing cognitive function in MS is crucial.

Purpose of the Study:

• To examine the impact of demographic and clinical variables on cognitive outcomes in MS patients.
• To assess the predictive power of the Cognitive Reserve Index Questionnaire (CRIq) and its subscores on cognitive performance.
• To investigate the role of CR in moderating the relationship between brain atrophy and cognitive status in MS.

Main Methods:

• 72 MS patients underwent neuropsychological testing (BRB-N) and MRI.
• Multivariate linear regression analyzed cognitive test scores against CR, age, brain volume, EDSS, and disease duration.
• The influence of CRI subscores (Education, Working Activity, Leisure Time) and CR-atrophy interaction was assessed.

Main Results:

• The CRI total score significantly predicted sustained attention, concentration, information processing speed, and verbal learning.
• CRI-Education and CRI-WorkingActivity subscores showed the most influence on cognitive performance.
• Age and EDSS score were also significant predictors; no CR moderation effect on atrophy was found.

Conclusions:

• Cognitive reserve, particularly from education and work, is a key predictor of cognitive performance in MS patients.
• The study utilized a comprehensive CRI questionnaire to assess CR sources.
• Further research is needed to fully confirm the CR hypothesis in the context of MS and brain atrophy.