The Clock Drawing Task reveals executive dysfunction in the dialysis population - an underrecognized and...

Area of Science:

• Nephrology
• Neuropsychology
• Cognitive Science

Background:

• Chronic kidney disease (CKD) patients exhibit increased risk for cognitive impairment (CI) compared to the general population.
• CI in CKD is a growing global concern, often underdiagnosed despite its impact on patient quality of life.
• Executive function impairment is a specific type of CI that may precede global cognitive decline.

Purpose of the Study:

• To determine the prevalence of executive function impairment in dialysis patients without subjective cognitive complaints or global cognitive deficits.
• To explore the association between cardiovascular risk factors and cognitive test performance in this cohort.

Main Methods:

• A cross-sectional, prospective study involving 58 dialysis patients.
• Screening for global cognitive function using the Mini-Mental State Examination (MMSE).
• Assessment of executive function impairment using the Executive Clock-Drawing Task (CLOX).

Main Results:

• The prevalence of executive function impairment was 8.6% among the studied dialysis patients.
• A consistent pattern of spatial deficit was observed in clock drawings (numbers outside the clock face).
• No significant correlation was detailed between cardiovascular risk factors and cognitive test results in the provided abstract.

Conclusions:

• Executive dysfunction can be present in dialysis patients before overt global cognitive impairment is detected.
• Spatial domain deficits may be an early indicator of cognitive issues in this population.
• Higher levels of education may offer a protective effect against cognitive decline in CKD patients.