Comparative information that can help you make a judgment about the magnitude of a risk. For example, knowing that at age 65 a woman who has never smoked has a 5 in 1,000 chance of dying from lung cancer in the next 10 years is much more meaningful if you know how that risk compares to other risks (a 25 in 1,000 chance of dying from a heart attack, a 3 in 1,000 chance of accidental death).