AP:

An Atlanta actuarial company specializing in individualized estimates of life and health expectancy has run the numbers for McCain, 72, and Obama, 47. The firm, Bragg Associates, calculated the odds of the candidates dying in office, adjusted for their known health problems.

McCain would be the oldest president to begin a first term in office. By the end of a second term, Jan. 20, 2017, he would have a 24.44 percent chance of dying, compared with 5.76 percent for Obama, the firm estimates....

For the Republican, Brooks took into account a history of skin cancer, degenerative arthritis from his Vietnam war injuries, moderately high cholesterol, mild vertigo and that McCain is a former smoker who quit in 1980.