title: Predictive factors of cervical spondylotic myelopathy in patients with lumbar spinal stenosis.
abstract: OBJECTIVE
  To analyze cervical spondylotic myelopathy (CSM) predictive factors in patients with lumbar spinal stenosis (LSS).
  
  
  METHODS
  Two hundred thirty-seven patients who visited for low back pain, lower limb pain and/or lower limb numbness and who were diagnosed with LSS were enrolled in this study. The ratio of males to females was 117-120, and the mean age was 68.8 years (range 45-87 years). LSS and CSM were diagnosed by characteristic symptoms, physical findings and MRI. We examined gender, age, Torg-Pavlov ratio (TPR), spondylolisthesis or spondylosis, LSS symptom types and number of stenosis segments with LSS to clarify predictive factors for CSM.
  
  
  RESULTS
  There were 21 (8.86%) patients with coexistent CSM among 237 LSS patients. CSM morbidity was significantly more common among males compared with females. TPR was 0.71 ± 0.09 in the CSM patients and 0.81 ± 0.10 in the non-CSM patients. TPR of the CSM patients was significantly smaller than that of the non-CSM patients. We analyzed to determine the predictive factors of CSM and TPR was identified. The predictive value of TPR for CSM was 0.78.
  
  
  CONCLUSIONS
  Torg-Pavlov ratio was the most important predictive factor of CSM in patients with LSS.
authors.affiliation: Department of Orthopaedic and Spinal Surgery, Saitama Mediclal University, Morohongo 38, Moroyama, Iruma, Saitama 350-0495, Japan. hideki.iizuka@nifty.com
authors.forename: Hideki
authors.initials: H
authors.lastname: Iizuka
authors.forename: Keisuke
authors.initials: K
authors.lastname: Takahashi
authors.forename: Shinya
authors.initials: S
authors.lastname: Tanaka
authors.forename: Kohei
authors.initials: K
authors.lastname: Kawamura
authors.forename: Yoshitomo
authors.initials: Y
authors.lastname: Okano
authors.forename: Hiromi
authors.initials: H
authors.lastname: Oda
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002574:Cervical Vertebrae / Q000000981:diagnostic imaging / Q000473:pathology; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012307:Risk Factors; D013117:Spinal Cord Compression / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000209:etiology*; D013130:Spinal Stenosis / Q000150:complications* / Q000175:diagnosis / Q000000981:diagnostic imaging