Silver Book Fact
Adults with low back pain are more than four times as likely to experience serious psychological distress, compared to those without back pain.
Centers for Disease Control and Prevention, National Center for Health Statistics. Health, United States, 2007: with chartbook on trends in the health of Americans. Atlanta, GA: Centers for Disease Control and Prevention; November 2007. http://www.cdc.gov/nchs/data/hus/hus07.pdf