For people living in new conventional homes, the high risk estimate is one in 10,000.
Both genetic and nongenetic factors are combined to develop a risk estimate.
These values were lower than most prior risk estimates.
Another complicating factor is that the risk estimates are based on mathematical models.
One is that people want to understand what a particular risk estimate means to them.
But many infectious disease experts say that, if anything, the risk estimates could be understated.
Using the agency's own risk estimates, he said, that would still mean 10,000 radon-associated deaths a year.
The quantitative risk estimates are presented in three ways to facilitate their use.
Most human health and environmental risk estimates are based solely on animal data.
The risk estimate has swung sharply over the years.