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The Many Difficulties and Subtleties in the Cognitive Assessment of Chronic Hepatitis C Infection

Jefferson Abrantes1, Daniel Simplicio Torres1, Carlos Eduardo Brandão-Mello2

  • 1Department of Neurology, Federal University of the State of Rio de Janeiro, Rua Mariz e Barros, 775 - Tijuca, Rio de Janeiro 20270-004, Brazil.

International Journal of Hepatology
|April 8, 2020
PubMed

Insights

Chronic hepatitis C virus (HCV) infection is linked to cognitive impairment, often described as "brain fog," even before liver cirrhosis develops. This overview examines cognitive dysfunction in HCV patients, considering previous study limitations.

Area of Science:

  • Hepatology
  • Neuroscience
  • Infectious Diseases

Background:

  • Hepatitis C virus (HCV) infection, discovered in 1989, is associated with numerous health complications.
  • Patients with chronic HCV infection frequently report cognitive impairment, termed "brain fog," preceding hepatic cirrhosis.
  • Existing research suggests a connection between chronic HCV and cognitive alterations, but confounding factors limit definitive conclusions.

Purpose of the Study:

  • To provide a comprehensive overview of cognitive dysfunction in patients with hepatitis C virus (HCV) infection.
  • To synthesize current understanding of the relationship between HCV and cognitive impairment.
  • To highlight the need for further research addressing confounding factors in HCV-related cognitive studies.

Main Methods:

  • Literature review of studies investigating cognitive function in HCV-infected individuals.
  • Analysis of reported cognitive deficits and their correlation with HCV infection status.
  • Examination of methodologies and limitations in previous research, including confounding variables.

Main Results:

  • Cognitive impairment is a commonly reported symptom in chronic HCV patients.
  • The "brain fog" experienced by HCV patients indicates potential neurological involvement.
  • Confounding factors in prior studies necessitate careful interpretation of results linking HCV and cognitive decline.

Conclusions:

  • Cognitive dysfunction is a significant concern in chronic hepatitis C virus infection.
  • HCV may directly or indirectly impact cognitive functions, warranting further investigation.
  • Future research should focus on isolating the effects of HCV on cognition by controlling for confounding variables.

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