The longest-living whites weren't the relatively wealthy. [...] They're edged out, by a year, by low-income residents of the rural Northern Plains states, where the men tend to reach age 76 and the women 82. Yet low-income whites in Appalachia and the Mississippi Valley die four years sooner than their Northern neighbors.
Here is the editor's summary and the original paper itself (which is, by the way, freely available to be read and distributed by the public.)
