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What is the greatest difference in life expectancy observed between counties in the U.S.?

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An American citizen’s zip code is a strong indicator of their health. A recent study of “Eight Americas” (comparing different groups within the country) found a 14.7 year gap in life expectancies at birth between the longest and shortest-lived counties.(1)

These differences become even starker between subgroups – for example, Asian American women in Bergen County, New Jersey, live 33 years longer than Native American men in South Dakota.

Health expert Sir Michael Marmot noted that on a subway ride from southeast Washington, D.C. (an impoverished African American neighborhood) to Montgomery County, Maryland (an affluent white suburb), life expectancy of the surrounding communities rises about a year and a half for every mile traveled –amounting to a 20-year gap.(2)

Sources:

(1) Murray, C.J.L. et al. (2006). “Eight Americas: Investigating Mortality Disparities across Races, Counties, and Race-Counties in the United States.” PLoS Med 3(9): e260. doi:10.1371/journal.pmed.0030260
(2) Marmot, Michael. (2004). Status Syndrome. New York: Henry Holt and Company.
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