Study: U.S. populations groups have life expectancy disparities

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Asian Americans have an average life expectancy of 84.9 years, while low-income rural whites in the Midwest can expect to live 79 years. Meanwhile, black Middle Americans live, on average, 72.9 years.

This information appears in a study published in the journal PloS Medicine. Harvard University researchers analyzed population, mortality and health insurance statistics for 2,072 individual and merged counties nationwide from 1982 to 2001. They offered statistics on eight groups based on geography, income and race.

Differences in life expectancy among the groups are due largely to premature deaths of young and middle-aged adults, mainly as a result of chronic diseases or injuries.