WEDNESDAY, June 15, 2011 (Health.com) — Life expectancy in most U.S. counties lags behind that of the world’s healthiest nations, in some cases by 50 years or more, according to a new analysis of government data.
For instance, in Holmes County, Miss., which has the lowest life expectancy in the country, a woman can expect to live 73.5 years, the average life span that women in the healthiest nations had in 1957 and have since far surpassed.
To determine how American life spans stack up internationally, researchers from the U.S. and the U.K. compared life expectancies in the U.S. to a moving average of those in the 10 nations with the lowest death rates, a group that includes other affluent countries such as Switzerland, Australia, Japan, and Canada.
Between 2000 and 2007, the researchers found, more than 80% of U.S. counties fell below the life-expectancy bar set by that group of leading nations, even though the U.S. spends more on health care per capita than any other country in the world.
Given the increasing life expectancy in countries like Canada and Australia, the widespread pattern of decline in the U.S. is “a huge surprise,” says Christopher Murray, MD, one of the study’s coauthors and the director of the Institute for Health Metrics and Evaluation at the University of Washington, in Seattle.
“We all know from previous work that there are great [life expectancy] disparities in the U.S. across counties, but I sort of expected that when we compared progress in counties to what’s possible that we would be keeping up,” Dr. Murray says. “And we’re not.”
The study, which was published in the journal Population Health Metrics, does show huge differences from one U.S. county to the next. In 2007, life expectancies for men ranged from a high of about 81 years (in Fairfax County, Va.) to a low of about 66 years in Holmes County.
The trends are especially concerning for women. Since 1997, women’s life expectancy has slipped or failed to rise in more than 850 counties (compared to just 84 counties for men), including 82% of the counties in Oklahoma, 66% in Tennessee, and 59% in Kentucky. In Mississippi, there are five counties where the life expectancy for women is on par with nations such as Honduras, El Salvador, and Peru.
The study’s findings are in sync with a report released in January by the National Research Council that compared life spans in the U.S. with those in other high-income nations, says Samuel Preston, PhD, a professor of demography at the University of Pennsylvania, in Philadelphia, and a co-chair of the panel that produced that report.
“The conclusion that American women are falling further behind their peers in [leading industrialized countries] certainly is correct, and if it’s happening at the national level, it has to be happening in some counties as well,” Preston says.
Next page: What explains county-to-county disparities?
