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Detection of Low Copy Number Integrated Viral DNA Formed by In Vitro Hepatitis B Infection
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Detection of Low Copy Number Integrated Viral DNA Formed by In Vitro Hepatitis B Infection

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Causes of death after diagnosis of hepatitis B or hepatitis C infection: a large community-based linkage study

Janaki Amin1, Matthew G Law, Mark Bartlett

  • 1National Centre in HIV Epidemiology and Clinical Research, University of New South Wales, NSW 2010, Australia. jamin@nchecr.unsw.edu.au

Lancet (London, England)
|September 12, 2006
PubMed

Insights

Hepatitis B and C infections increase liver-related deaths, especially with co-infection. Young individuals with hepatitis C face higher drug-related mortality risks than liver disease risks.

Area of Science:

  • Hepatology and Virology
  • Public Health and Epidemiology
  • Mortality Studies

Background:

  • Hepatitis B (HBV) and hepatitis C (HCV) are leading causes of liver disease mortality globally.
  • Understanding the all-cause mortality associated with these viral infections in community settings is crucial for public health interventions.

Purpose of the Study:

  • To investigate the all-cause mortality rates in individuals with hepatitis B virus (HBV) infection, hepatitis C virus (HCV) infection, and HBV-HCV co-infection.
  • To compare mortality risks, including liver-related and drug-induced deaths, across these infection groups and with the general population.

Main Methods:

  • A large cohort study involving 39,109 individuals with HBV, 75,834 with HCV, and 2,604 with HBV-HCV co-infection in New South Wales, Australia (1990-2002).
  • Probabilistic linkage of patient data with the National Death Index to identify mortality outcomes.
  • Calculation of standardized mortality ratios (SMRs) adjusted for age, sex, and calendar year.

Main Results:

  • All groups exhibited increased liver-related mortality compared to the general population, with the highest SMR in the HBV-HCV co-infection group (32.9).
  • Significantly elevated risks of drug-induced deaths were observed, particularly in the HCV (SMR 19.3) and HBV-HCV co-infection (SMR 24.7) groups.
  • In individuals with HCV, drug-related mortality risk exceeded liver-related mortality risk (p=0.012), notably in young women (15-24 years).

Conclusions:

  • Hepatitis B and C infections are associated with increased liver-related mortality, with co-infection posing the greatest risk.
  • Drug use represents a significant mortality risk for young individuals with HCV and co-infection, surpassing the risk from the viral infection itself.
  • While liver disease is the primary driver of mortality in HBV, drug-related causes are a major concern for HCV-infected individuals, especially younger populations.
Abstract

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