Silver Book Fact
Around 14% of adults who experience pain report that it lasts 3 months to a year and 42% report pain that lasts more than a year.
Centers for Disease Control and Prevention, National Center for Health Statistics. Health, United States, 2006: With chartbook on trends in the health of Americans. Atlanta, GA: Centers for Disease Control and Prevention; 2006. http://www.cdc.gov/nchs/data/hus/hus06.pdf