The average American spends 12.4 years in poor health, primarily due to chronic age-related diseases.

“if you accept that 60% of Americans have at least one chronic disease and the median age in the United States is 38 point something and then you think about how long are people living on average that would suggest if you say that and again this is what you're getting at with the definition of Health span I would not Define health span as ending once you have your first chronic disease but that's the definition most people would use if you use that definition most people are spending three decades or more in the absence of Health span right or in sick span”