The continuous reaction time test for minimal hepatic encephalopathy validated by a randomized controlled multi-modal...

Area of Science:

• Neurology
• Gastroenterology
• Cognitive Science

Background:

• Minimal hepatic encephalopathy (MHE) is subclinical, posing diagnostic challenges.
• Current psychometric tests for MHE lack clarity regarding their ability to detect cognitive changes.

Purpose of the Study:

• To evaluate if the continuous reaction time test (CRT) can detect cognitive changes in cirrhosis patients without overt hepatic encephalopathy (HE) during anti-HE therapy.

Main Methods:

• A randomized controlled pilot study stratified 44 cirrhosis patients (with or without normal CRT) into active treatment or placebo groups.
• The continuous reaction time test (CRT) measured alertness stability, with the CRT index as the primary outcome.
• Portosystemic encephalopathy (PSE) test served as a comparator.

Main Results:

• Patients with abnormal CRT receiving active anti-HE intervention showed normalized/improved CRT index (p=0.01) and PSE scores (p=0.03).
• No significant cognitive improvements were observed in other study groups.

Conclusions:

• The CRT effectively identified a subgroup of cirrhosis patients with MHE whose cognition improved with intensive anti-HE treatment.
• CRT may assist in selecting patients who will benefit from hepatic encephalopathy interventions.