title: Acute low back pain: systematic review of its prognosis.
abstract: OBJECTIVE
  To describe the course of acute low back pain and sciatica and to identify clinically important prognostic factors for these conditions.
  
  
  METHODS
  Systematic review.
  
  
  METHODS
  Searches of Medline, Embase, Cinahl, and Science Citation Index and iterative searches of bibliographies.
  
  
  METHODS
  Pain, disability, and return to work.
  
  
  RESULTS
  15 studies of variable methodological quality were included. Rapid improvements in pain (mean reduction 58% of initial scores), disability (58%), and return to work (82% of those initially off work) occurred in one month. Further improvement was apparent until about three months. Thereafter levels for pain, disability, and return to work remained almost constant. 73% of patients had at least one recurrence within 12 months.
  
  
  CONCLUSIONS
  People with acute low back pain and associated disability usually improve rapidly within weeks. None the less, pain and disability are typically ongoing, and recurrences are common.
authors.affiliation: School of Physiotherapy, University of Sydney, PO Box 170, Lidcombe NSW 1825, Australia.
authors.forename: Liset H M
authors.initials: LH
authors.lastname: Pengel
authors.forename: Robert D
authors.initials: RD
authors.lastname: Herbert
authors.forename: Chris G
authors.initials: CG
authors.lastname: Maher
authors.forename: Kathryn M
authors.initials: KM
authors.lastname: Refshauge
mesh_terms: D000208:Acute Disease; D006233:Persons with Disabilities / Q000706:statistics & numerical data; D004651:Employment; D006801:Humans; D017116:Low Back Pain / Q000534:rehabilitation*; D011379:Prognosis; D012008:Recurrence; D012585:Sciatica / Q000534:rehabilitation