Assessing Functional Cognition in People on Maintenance Hemodialysis Using Performance-Based Testing

Area of Science:

• Nephrology
• Neuroscience
• Gerontology

Background:

• Maintenance hemodialysis patients often struggle with daily tasks.
• The link between functional limitations and cognitive impairment in this population is not well understood.
• This study aimed to quantify functional cognitive impairment in hemodialysis patients using a performance-based assessment.

Purpose of the Study:

• To estimate the prevalence of functional cognitive impairment in individuals undergoing maintenance hemodialysis.
• To assess the correlation between a performance-based functional cognition test and traditional cognitive screening tools and self-report measures.
• To identify predictors of functional cognitive impairment in this patient group.

Main Methods:

• A cross-sectional study involving 105 hemodialysis patients in Toronto.
• Utilized the University of California San Diego Performance-Based Skills Assessment-Brief (UPSA-B) for functional cognition assessment.
• Administered the Montreal Cognitive Assessment (MoCA), Barthel Index, and Lawton-Brody IADL scale for comparison.

Main Results:

• 54% of participants (n=56) showed functional cognitive impairment based on the UPSA-B.
• Strong correlation found between UPSA-B and MoCA (r=0.67), weak correlations with Barthel Index (r=0.38) and IADL (r=0.39).
• Older age and ethnic minority status were significant predictors of functional cognitive impairment.

Conclusions:

• Functional cognitive impairment is highly prevalent in patients on maintenance hemodialysis.
• Performance-based assessments are crucial for identifying cognitive deficits impacting daily functioning.
• Cognitive rehabilitation strategies should be explored to improve functional outcomes in this population.