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life expectancy
(redirected from Mean life span)

    Also found in: Medical, Financial, Wikipedia 0.12 sec.

life expectancy

Average lifespan that can be presumed of a person at birth. It depends on nutrition, disease control, environmental contaminants, war, stress, and living standards in general.

There is a marked difference between industrialized countries, which generally have an ageing population, and the poorest countries, where life expectancy is much shorter. In Malawi, life expectancy is currently 42; in Nigeria 47; in Ethiopia 49. In Zambia, the AIDS epidemic brought the life expectancy down to a record 33 years, according to government figures released in 2003.

In the US, average life expectancy continues to rise. In 2003 it stood at 80.1 for women and 74.8 for men; heart disease is the main cause of death.



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