From the article:
But regardless of socioeconomics, geography or total number of years lived, the study shows what appears to be a universal part of the human condition: people live an average of one-eighth of their lives in a disabled or unhealthy state.
“What’s interesting is that wherever you go around the world, about seven-eighths of life expectancy is healthy,” says Peter Byass, professor of global health at Umea University in Sweden. “I’m not sure we totally understand why.”
“We probably can’t do a lot about decreasing this part of life that’s not healthy,” he adds. “That pretty much appears to be a part of being human.”
Read NPR’s full news story: How long will you live — and how many of those years will be healthy?