Silver Book Fact
The risk of developing invasive cancer, a common source of persistent pain, increases from 1 in 69 for men and 1 in 46 for women under the age of 39, to 1 in 3 for men and 1 in 4 for women ages 60 and older.
American Cancer Society. Cancer Facts & Figures 2013. Atlanta, GA: American Cancer Society; 2013. http://www.cancer.org/acs/groups/content/@epidemiologysurveilance/documents/document/acspc-036845.pdf