All the external links/studies that have been used to put this page together.
- Biering-Sorenson F. Low back trouble and a general population of 30-, 40-, 50-, and 60–year-old men and women.Dan Med Bull. 1982. 29:289-99.
- Damkot DK, Pope MH, Lord J, Frymoyer JW. The relationship between work history, work environment and low-back pain in men. Spine (Phila Pa 1976). 1984 May-Jun. 9(4):395-9. [Medline].
- In National Center for Health Statistics (1982):. Surgical operations in short stay hospitals by diagnosis, United States. 1978. Series 13, No.61.
- National Center for Health Statistics (1976):. Inpatient utilization of short stay hospitals by diagnosis, United States. 1973. Series 13, No.25.
- National Center for Health Statistics (1976):. Surgical operations in short stay hospitals by diagnosis, United States. 1973. Series 13, No.24.
- Kelsey JL, White AA. Epidemiology of low back pain. Spine. 1980. 6:133-42.
- Mayer TG, Gatchel RJ. Functional restoration for spinal disorders: The sports medicine approach. Philadelphia: Lea & Febiger; 1988.
- Anderssen GBJ. Frymoyer JW (ed.). The epidemiology of spinal disorders, in The Adult Spine: Principles and Practice. New York: Raven Press; 1997. 93-141.
- Cunningham LS, Kelsey JL. Epidemiology of musculoskeletal impairments and associated disability. Am J Public Health. 1984 Jun. 74(6):574-9. [Medline].
- Frymoyer JW. Back pain and sciatica. N Engl J Med. 1988 Feb 4. 318(5):291-300. [Medline].
- Girardin JL, Williams NJ, Sarpong D, Pandey A, et al. Associations between inadequate sleep and obesity in the US adult population: analysis of the national health interview survey (1977-2009). BMC Public Health. 2014;14;290.
