Cognitive reserve is a resilience factor for cognitive dysfunction in hepatic encephalopathy.

Area of Science:

• Neuroscience
• Hepatology
• Cognitive Psychology

Background:

• Cognitive Reserve (CR) is known to modulate the clinical symptoms of various brain diseases.
• Hepatic Encephalopathy (HE) is a complication of cirrhosis that affects cognitive function.
• Assessing HE often involves both cognitive and neurophysiological measures, but a mismatch can occur.

Purpose of the Study:

• To investigate the effect of Cognitive Reserve (CR) on cognitive function in patients with cirrhosis.
• To examine the relationship between CR and the mismatch between cognitive and neurophysiological assessments of hepatic encephalopathy (HE).

Main Methods:

• Eighty-two outpatient patients with cirrhosis but without overt HE were recruited.
• Cognitive function was assessed using the Psychometric Hepatic Encephalopathy Score (PHES).
• Neurophysiological assessment was performed using electroencephalogram (EEG) spectral analysis. Cognitive Reserve Index (CRI) was measured using the CRI questionnaire (CRIq).

Main Results:

• 28% of patients showed altered PHES and 41% had abnormal EEG findings.
• Patients with preserved PHES had significantly higher CRI scores compared to those with altered PHES (p < 0.01).
• The PHES, but not EEG, was significantly related to CRI (r = 0.35, p < 0.01). The cognitive-neurophysiological mismatch also correlated with CRI (r = 0.36, p < 0.005).

Conclusions:

• Cognitive Reserve acts as a resilience factor against cognitive dysfunction in cirrhosis patients.
• The CRI questionnaire (CRIq) provides an easily measurable assessment of CR in this population.
• CR influences the manifestation and detection of cognitive impairment in cirrhosis, particularly in relation to HE assessment.