In 13 counties across the U.S., Americans can now expect to die younger than their parents did. And the eight counties with the largest declines in life expectancy since 1980 are all in the state of Kentucky.
That’s according to a new study out Monday in the journal JAMA: Internal Medicine, for which researchers examined geographic changes and inequality in life expectancy across the U.S.
The authors, who are from the Institute for Health Metrics and Evaluation, at the University of Washington, and Erasmus University, in the Netherlands, found that although life expectancy at birth for Americans increased from 73.8 years in 1980 to 79.1 years in 2014, there is a 20-year gap in life expectancy between the shortest- and longest-living counties. This inequality in life expectancy has grown since 1980, they found. Other studies have found that nationally, life expectancy has ticked down slightly since 2014, the final year of the JAMA study.
Several of the counties with the overall lowest life expectancy encompass Native American reservations. South Dakota’s Oglala Lakota County, which includes the Pine Ridge Native American reservation, had the lowest life expectancy in 2014, at 66.8 years. That’s comparable to countries like Sudan and Iraq, according to a University of Washington press release.
The three longest-living counties were all in Colorado: Summit, Eagle, and Pitkin, which are home to wealthy, outdoorsy enclaves such as Vail and Breckenridge. There, people live until they’re about 86, on average.
Interestingly, the study finds that the risk of dying under age 5 dropped in all counties since 1980, possibly thanks to programs that target improving the health of infants and children. Meanwhile, the risk of death between the ages of 25 and 45 rose in about 12 percent of all U.S. counties.
The authors found that much of the disparity in life expectancy was explained by risk factors like obesity, physical inactivity, hypertension, smoking, and diabetes, but that poverty, education, and unemployment also play a role.
That could be why eight of the 10 counties with the largest decreases in life expectancy since 1980 were all in lower-income areas of Kentucky. According to the study, the counties with the largest decreases in life expectancy between 1980 to 2014 were:
- Owsley County, Kentucky (-3 percent)
- Lee County, Kentucky (-2 percent)
- Leslie County, Kentucky (-1.9 percent)
- Breathitt County, Kentucky (-1.4 percent)
- Clay County, Kentucky (-1.3 percent)
- Powell County, Kentucky (-1.1 percent)
- Estill County, Kentucky (-1 percent)
- Perry County, Kentucky (-0.8 percent)
Rounding out the bottom 10 were Kiowa County in southwestern Oklahoma, with a 0.7 percent decline in life expectancy, and Perry County, Alabama, with a 0.6 percent decline.
Kentucky has one of the highest rates of death from drug overdoses, with about 30 deaths per 100,000 people. Owsley County is the country’s poorest white-majority county, according to a 2016 analysis by Al Jazeera, with about 45 percent of its roughly 4,500 residents living in poverty. The decline of coal mines and tobacco fields have battered the county, whose population peaked in 1940. (Indeed, the JAMA study authors acknowledge that part of the life expectancy trends might be due to healthy people moving away from blighted areas, and “high-risk” people remaining in them.)
Although opioids explain some of the inequality in life expectancy, experts say poor diets and financial strain are also major reasons for the worsening health of less-educated, white Americans. In parts of Appalachia, for example, more people are dying of heart disease now than were in 1980.
“The inequality in health in the United States—a country that spends more on health care than any other—is unacceptable,” Christopher Murray, director of the Institute for Health Metrics and Evaluation, said in a statement. “Every American, regardless of where they live or their background, deserves to live a long and healthy life. If we allow trends to continue as they are, the gap will only widen between counties.”
This post originally appeared on The Atlantic.