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Liver cancer

S O Stuver1, D Trichopoulos

  • 1Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts 02115.

Cancer Surveys
|January 1, 1994
PubMed
Summary
This summary is machine-generated.

Liver cancer incidence and mortality trends varied globally. Changes were often weak and influenced by diagnostic practices rather than solely biological factors.

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Area of Science:

  • Epidemiology
  • Oncology
  • Public Health

Background:

  • Liver cancer remains a significant global health concern.
  • Understanding temporal trends in incidence and mortality is crucial for public health strategies.
  • International comparisons can reveal regional variations and potential contributing factors.

Purpose of the Study:

  • To investigate trends in primary liver cancer incidence and mortality across several countries.
  • To analyze these trends by gender and age.
  • To explore potential biological and non-biological explanations for observed changes.

Main Methods:

  • Utilized data from Cancer Incidence in Five Continents (Vols I-VI) for age-specific incidence rates by sex.
  • Incorporated additional incidence data from the US Connecticut Tumor Registry and Surveillance, Epidemiology, and End Results (SEER) Program.

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  • Calculated mortality rates using the World Health Organization (WHO) database.

    • Main Results:

    • Observed generally weak trends in liver cancer incidence and mortality across the studied nations.
    • Noted increasing primary liver cancer occurrence in Japan and Nordic countries, with stabilization or decrease in Sweden.
    • Identified decreasing trends in Spain and Singapore, with more pronounced changes in males than females.

    Conclusions:

    • Apparent changes in liver cancer rates are likely influenced by classification, coding, and diagnostic practice variations.
    • Biological factors may play a role, but methodological changes appear dominant in explaining trends.
    • Further research is needed to disentangle true epidemiological shifts from artifactual changes.