title: Clinical outcome of nonoperative treatment for lumbar spinal stenosis, and predictive factors relating to prognosis, in a 5-year minimum follow-up.
abstract: METHODS
  A prospective long-term follow-up study of nonoperative treatment for lumbar spinal stenosis (LSS) and multivariable analysis of the prognosis.
  
  
  OBJECTIVE
  To clarify the outcomes of nonoperative treatment for LSS over a long-term follow-up, and to extrapolate factors relating to the prognosis of treatment.
  
  
  BACKGROUND
  The indicators of treatment for LSS remain controversial, and few reports have evaluated the prognosis of its nonoperative treatment, or extrapolated the factors that aid prognosis.
  
  
  METHODS
  One hundred twenty patients who received inpatient nonoperative treatment were followed up for 5 years or longer. Patients' nerve involvement and myelographic findings were classified, and the disturbance level of activities of daily living (ADL) at final follow-up was graded. The association between patients' age and sex, classification of nerve involvement and myelographic findings, recovery rate by initial nonoperative treatment, presence or absence of degenerative spondylolisthesis/scoliosis, and disturbance level of ADL were evaluated statistically to extrapolate prognostic factors.
  
  
  RESULTS
  In all, 52.5% of patients showed no hindrance to ADL at follow-up. Patients who were classified as radicular type, or responded well to initial nonoperative treatment, exhibited statistically better results than did other patients. In contrast, accompanying degenerative scoliosis tended to be related to a poorer prognosis.
  
  
  CONCLUSIONS
  The current study demonstrated the long-term follow-up outcome of nonoperative treatment for LSS. Important factors relating to the prognosis were demonstrated. These factors could aid the decision-making process for treatment of LSS patients.
authors.affiliation: Department of Orthopaedic Surgery, National Hospital Organization Kobe Medical Center, Kobe, Japan. hiroshimiyamoto@hotmail.com
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Miyamoto
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Sumi
authors.forename: Koki
authors.initials: K
authors.lastname: Uno
authors.forename: Kou
authors.initials: K
authors.lastname: Tadokoro
authors.forename: Kiyonori
authors.initials: K
authors.lastname: Mizuno
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D000369:Aged, 80 and over; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000627:therapeutic use*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007103:Immobilization / Q000706:statistics & numerical data*; D007564:Japan / Q000453:epidemiology; D008159:Lumbar Vertebrae; D008297:Male; D008875:Middle Aged; D009407:Nerve Block / Q000706:statistics & numerical data*; D015995:Prevalence; D011379:Prognosis; D018570:Risk Assessment / Q000379:methods*; D012307:Risk Factors; D013130:Spinal Stenosis / Q000453:epidemiology* / Q000601:surgery / Q000628:therapy*; D016896:Treatment Outcome
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal