ScienceDaily (2010-06-05) -- A sense of humor helps to keep people healthy and increases their chances of reaching retirement age. But after the age of 70, the health benefits of humor decrease, researchers have found.
Svebak, S., Romundstad, S., & Holmen, J. A 7-year prospective study of sense of humor and mortality in an adult county population: The HUNT-2 study. The International Journal of Psychiatry in Medicine, 40, 125-146