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Illustrations presented in this lecture are from the IARC/GLOBOCAN2002 web resources, downloaded from the IARC/CANCERMondial web-page (http://www-dep.iarc.fr/)

Reference Food, Nutrition and the Prevention of Cancer: A Global Perspective. 1997. (WCRF/AICR)

Incidence rates of all cancers combined

http://meddev.uio.no/elaring/lcms13/ernaeringslaere/nutr-cancer-epidemiology/illustrations/incidence_2008both_all.jpg

Age-standardized incidence rate

What is an age-standardized rate (ASR)?

  • A summary measure of a rate that a population would have if it had a certain age structure.
  • Standardization is necessary when comparing several populations that differ with respect to age because age has such a powerful influence on the risk of cancer. Otherwise populations with a higher proportion of elderly would appear to have higher incidence rates than countries where a larger percentage is young.

Example

  • Take the country’s age specific rates,
  • multiply each with the world standard population for each age group (se below),
  • add up these age-specific products,
  • divide by 100 000.

This gives a “World Standardized incidence or mortality rate”

World standard population

The table provides the number of people in each age group of the world standard population

http://meddev.uio.no/elaring/lcms13/ernaeringslaere/nutr-cancer-epidemiology/illustrations/worldstandard.JPG

Look at the map below from www.unicef.org.
Discussion question:
Is cancer a disease of the developed world?

http://meddev.uio.no/elaring/lcms13/ernaeringslaere/nutr-cancer-epidemiology/illustrations/millennium_map.JPG

Some useful LINKS to web pages relevant to this topic are listed below:

World Health Organization

Global Strategy on Diet, Physical Activity and Health


Food and nutrition information center (U.S. Dept of Agriculture)


Cancer: (National Cancer Institute, U.S., Physician Data Query (prevention and treatment of cancer)


The International Epidemiological Association (with many useful epidemiology links)

The Epidemiology Monitor

Harrison's online