title: Comorbid subjective health complaints in low back pain.
abstract: METHODS
  Cross-sectional study.
  
  
  OBJECTIVE
  To compare subjective health complaints in subacute patients with low back pain with reference values from a Norwegian normal population.
  
  
  BACKGROUND
  Comorbidity is common with nonspecific low back pain. We wanted to investigate if these complaints were specific or part of a more general unspecific condition comparable to subjective health complaints in the normal population.
  
  
  METHODS
  The study group consisted of 457 patients sick-listed 8 to 12 weeks for low back pain. All subjects filled out questionnaires. The subjective health complaints in the study group were compared with reference values from a Norwegian normal population using logistic regression analysis.
  
  
  RESULTS
  Compared with the normal reference population, the patients with low back pain had significantly more low back pain, neck pain, upper back pain, pain in the feet during exercise, headache, migraine, sleep problems, flushes/heat sensations, anxiety, and sadness/depression. The prevalence of pain in arms, pain in shoulders, and tiredness was also high, but not significantly higher than in the reference population.
  
  
  CONCLUSIONS
  Our findings indicate that patients with low back pain suffer from what may be referred to as a "syndrome," consisting of muscle pain located to the whole spine as well as to legs and head, and accompanying sleep problems, anxiety, and sadness/depression.
authors.affiliation: Spine Clinic, Sykehuset Innlandet HF, Ottestad, Norway. emhagen@online.no
authors.forename: Eli Molde
authors.initials: EM
authors.lastname: Hagen
authors.forename: Erling
authors.initials: E
authors.lastname: Svensen
authors.forename: Hege R
authors.initials: HR
authors.lastname: Eriksen
authors.forename: Camilla M
authors.initials: CM
authors.lastname: Ihlebaek
authors.forename: Holger
authors.initials: H
authors.lastname: Ursin
mesh_terms: D000328:Adult; D001007:Anxiety / Q000453:epidemiology; D015897:Comorbidity; D003430:Cross-Sectional Studies; D003863:Depression / Q000453:epidemiology; D005260:Female; D006801:Humans; D017116:Low Back Pain / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D019964:Mood Disorders / Q000453:epidemiology; D018482:Muscle, Skeletal; D010146:Pain / Q000453:epidemiology; D012893:Sleep Wake Disorders / Q000453:epidemiology; D011795:Surveys and Questionnaires