title: A comparison of functional assessment instruments and work status in chronic back pain.
abstract: OBJECTIVE
  The aim of this cross sectional study was to analyse whether low back pain (LBP) functional assessment instruments correlate well with work status measures.
  
  
  METHODS
  This study was a cross sectional study that enrolled 375 patients with chronic LBP attending back pain outpatient clinics of a University Hospital and a specialist rehabilitation centre over a period of one year. The outcome scores measured were Oswestry Disability Index, Roland Morris Disability Questionnaire and Orebro Musculoskeletal Pain Questionnaire. The effect of back pain on their work status was also recorded and correlated to the above instrument values.
  
  
  RESULTS
  There was a only a modest correlation between work status and the three measured outcome scores, with the Spearman rank correlation being 0.47 for OMPQ, 0.43 for ODI and 0.39 for RMQ.
  
  
  CONCLUSIONS
  The studied standard LBP outcome measures and work status are not interchangeable. The impact on work status should not be assumed based on the severity of these outcome measures and should be recorded as a separate outcome measure in chronic low back pain.
authors.affiliation: Department of Orthopedic Surgery University Hospitals of Leicester NHS Trust Leicester, United Kingdom. drmanojsivan@yahoo.com
authors.forename: M
authors.initials: M
authors.lastname: Sivan
authors.forename: B
authors.initials: B
authors.lastname: Sell
authors.forename: P
authors.initials: P
authors.lastname: Sell
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002908:Chronic Disease; D003430:Cross-Sectional Studies; D004185:Disability Evaluation; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D016014:Linear Models; D017116:Low Back Pain / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D011795:Surveys and Questionnaires