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Related Experiment Videos

Time dependency in human cancer.

R B Hayes1, P Vineis

  • 1Division of Cancer Etiology, National Cancer Institute, Bethesda, Maryland 20892.

Tumori
|June 30, 1989
PubMed
Summary
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The concept of latency period in chronic disease epidemiology faces challenges. Studying cancer development as a multistep process offers a more promising approach than defining fixed latency periods.

Area of Science:

  • Chronic disease epidemiology
  • Cancer research
  • Temporal analysis in disease development

Background:

  • The concept of latency period in chronic disease epidemiology is derived from infectious disease incubation periods.
  • This concept is frequently applied to understand cancer development over time.

Purpose of the Study:

  • To critically evaluate the use of the mean latency period concept in cancer epidemiology.
  • To explore conceptual and methodologic issues associated with latency periods.
  • To examine the influence of age and exposure factors on cancer risk over time.

Main Methods:

  • Discussion of conceptual frameworks for latency in epidemiology.
  • Analysis of temporal factors including age at diagnosis, age at exposure initiation, exposure duration, and time since exposure.

Related Experiment Videos

  • Illustration of multistep models for cancer development.

    • Main Results:

    • The concept of a single 'latency period' presents conceptual and methodologic difficulties in cancer epidemiology.
    • Factors like age at diagnosis, age at exposure start, exposure duration, and years since exposure significantly modify cancer risks.
    • Multistep models provide a framework for understanding the temporal sequence of cancer development.

    Conclusions:

    • Defining exposure-disease relationships by fixed latency periods is less informative than previously thought.
    • A multistep process model offers a more robust approach to interpreting temporal associations in cancer development.
    • Future research should focus on the dynamic, sequential nature of carcinogenesis rather than static latency periods.