The CSM Trial: A Multicenter Study Comparing Ventral to Dorsal Surgery for Cervical Spondylotic Myelopathy

This study has been completed.
Sponsor:
Collaborator:
Yale University
Information provided by (Responsible Party):
Greenwich Hospital
ClinicalTrials.gov Identifier:
NCT00506558
First received: July 24, 2007
Last updated: August 28, 2012
Last verified: August 2012

July 24, 2007
August 28, 2012
November 2006
May 2012   (final data collection date for primary outcome measure)
Oswestry Neck Disability Index, mJOA, major complication rate [ Time Frame: 1 year ] [ Designated as safety issue: No ]
Oswestry Neck Disability Index, mJOA, major complication rate [ Time Frame: 1 year ]
Complete list of historical versions of study NCT00506558 on ClinicalTrials.gov Archive Site
SF-36 physical component summary (PCS), EuroQol-5D [ Time Frame: 1 year ] [ Designated as safety issue: No ]
SF-36 physical component summary (PCS), EuroQol-5D [ Time Frame: 1 year ]
Not Provided
Not Provided
 
The CSM Trial: A Multicenter Study Comparing Ventral to Dorsal Surgery for Cervical Spondylotic Myelopathy
The CSM Trial: A Multicenter Study Comparing Ventral to Dorsal Surgery for Cervical Spondylotic Myelopathy

The purpose of the study is to determine the optimal surgical approach (ventral versus dorsal) for patients with multi-level cervical spondylotic myelopathy (CSM). There are no established guidelines for the management of patients with CSM, which slowly causes spinal cord injury in afflicted patients.

This study aims to test the hypothesis that ventral surgery (decompressing the spinal cord from the front of the neck) and dorsal surgery (decompressing the spinal cord from the back of the neck) might differ in their overall outcome or major complication rate.

A. Purpose To determine the optimal surgical approach (ventral versus dorsal) for patients with multi-level cervical spondylotic myelopathy (CSM).

B. Background There are no established guidelines for the management of patients with CSM. It is estimated that up to 30 percent of patients have an unsatisfactory outcome after surgery for CSM. It remains uncertain how dorsal and ventral approaches differ in their success rates and in their complication rates. This study aims to test the hypothesis that ventral and dorsal surgical approaches differ in their outcomes or major complication rates. A secondary hypothesis is that fusion might improve outcome by reducing repetitive shear injury to the spinal cord.

C. Specific Location of Study

This is a multi-center trial. Subjects will be entered into the study from 9 separate centers. At this site, subjects will be recruited from the office of Dr. Zoher Ghogawala. All subjects at this site will undergo surgery at Greenwich Hospital.

D. Probable Duration of Project

Subjects will be recruited into the study for one year. All subjects will be followed for 1 year.

E. Research Plan

  1. Prospective, non-randomized multicenter trial. Approximately 100-200 patients would be recruited over one year with follow-up at one year.
  2. Subjects (aged 40-85 years) with spinal cord compression (2 or more levels) from degenerative cervical spondylosis with clinical myelopathy will be treated with either ventral decompression/fusion or dorsal decompression with or without fusion.
  3. Subjects with cervical kyphosis > 5˚, a segmental kyphotic deformity defined as 3 or more disc-osteophytes that extend dorsal to a line drawn from the dorsal caudal point of C2 to the dorsal caudal point of C7, ossification of the posterior longitudinal ligament (OPLL), or developmental spinal canal narrowing (12mm) would be excluded from the study.
  4. Functional outcomes will be determined using well-known quantitative scales (SF-36, Oswestry Neck, mJOA, Nurick, and EuroQol-5D). These instruments will be administered pre-op, 3 months, 6 months, and 1 year post-op.
  5. Two independent neuroradiologists will review the initial films to confirm eligibility and review post-operative films (3 months, 6 months, and 1 year) to determine radiographic decompression and fusion as well as any complications.
  6. An independent study coordinator will collect data at 30 days and at 1 year to document any complications or re-operations.

F. Data and Safety Monitoring Plan

  1. All serious unexpected adverse events (e.g. death within 30 days of operation) will be reported to the IRB within 24 hours. Any appropriate funding agencies or regulatory agencies would be notified as well.
  2. Any serious anticipated adverse event (e.g. wound infection, pulmonary embolus) will be reported to the IRB whenever their magnitude or frequency exceeds expectations.
  3. All other adverse events (including loss of privacy, significant economic harm) will be reported to the IRB on an annual basis or at the time that re-approval is sought. Any adverse event judged unlikely or unrelated to the study will also be included in an annual report for the IRB.

         G. Statistical Considerations

    1. Specific data variables being collected for the study.

      The data collection sheets will be submitted along with this protocol. There will be several data sheets as follows: 1) Spine surgeon's data sheet, 2) 30-day and 6-month morbidity data sheet, 3)1-year morbidity data sheet, 4) SF-36 questionnaires (pre-op, 3 months, 6 months, 1 year), 5) Oswestry Neck Disability Index questionnaires (pre-op, 3 months, 6 months, 1 year), 6)mJOA, (pre-op, 3 months, 6 months, 1 year), 7) Nurick questionnaire (pre-op, 3 months, 6 months, 1 year), 8)EuroQol-5D (pre-op, 3 months, 6 months, 1 year), 9)Radiology Review (pre-op, 3 months, 6 months, 1 year, 2 years).

    2. Study endpoints.

      Patients will be followed for 1 year. The primary endpoints will be the SF-36 physical component summary score (PCS) and the Oswestry Neck Disability Index. Secondary endpoints will include the Nurick, mJOA, and EuroQol-5D scores as well as the observed complication rates. Radiographic fusion, instability, and deformity will also be secondary outcomes.

    3. Statistical Methods.

      Analysis will focus on the physical component summary (PCS) of the SF-36, the Oswestry Neck Disability index, and the major complication rate. The t-test will be used to compare the groups for continuous variables such as the SF-36 PCS and the Oswestry Neck Disability Index. The Chi-square test will be used to compare the group's complication rates. Multiple regression techniques will be applied to control for potential confounders including age, medical condition, number of stenotic levels, degree of lordosis or kyphosis, etc.

    4. Power Analysis.

    The data generated from the SF-36 or the Oswestry Neck Disability Index will be used to calculate sample size for a future randomized controlled trial (RCT) comparing ventral to dorsal surgery. If no significant differences are identified in these primary outcomes measures, then a sample size calculation will be done using any differences in major complication rates.

Interventional
Phase 3
Allocation: Non-Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Cervical Spondylotic Myelopathy
  • Procedure: Ventral Surgical Decompression with Instrumented Fusion
    Multi-level discectomy or Corpectomy are performed at surgeon's discretion. After decompression an instrumented fusion is performed.
  • Procedure: Dorsal Decompression With or Without Fusion
    Dorsal decompressive laminectomy, laminoplasty, or laminectomy with lateral mass instrumented fusion
  • Experimental: A
    Ventral Decompression and Instrumented Fusion
    Intervention: Procedure: Ventral Surgical Decompression with Instrumented Fusion
  • Active Comparator: B
    Dorsal Decompression with or without fusion
    Intervention: Procedure: Dorsal Decompression With or Without Fusion

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Completed
103
May 2012
May 2012   (final data collection date for primary outcome measure)

Inclusion Criteria:

  • degenerative cervical spondylotic myelopathy (2 or more levels of spinal cord compression)

Exclusion Criteria:

  • C2-C7 kyphosis>5˚ (measured on lateral cervical spine image in extension)
  • Segmental kyphotic deformity defined as 3 or more levels of disc-osteophyte extend dorsal to a line drawn from the dorsal caudal point of C2 to the dorsal caudal point of C7.
  • Ossification of posterior longitudinal ligament (OPLL)
  • Developmental narrow canal (<12 mm-canal diameter measured on lateral plain cervical spine film)
Both
40 Years to 85 Years
No
Contact information is only displayed when the study is recruiting subjects
United States
 
NCT00506558
GH-CSM-382, GH-CSM-382
Yes
Greenwich Hospital
Greenwich Hospital
Yale University
Study Director: Zoher Ghogawala, MD, FACS Greenwich Hospital - Yale Universtiy School of Medicine
Principal Investigator: Edward C. Benzel, MD The Cleveland Clinic
Principal Investigator: Robert Heary, MD University of Medicine and Dentistry New Jersey
Principal Investigator: Ronald Apfelbaum University of Utah
Principal Investigator: Jean-Valery Coumans, MD Massachusetts General Hospital
Principal Investigator: Subu N Magge, MD Lahey Clinic
Greenwich Hospital
August 2012

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP