VERTOS-II. Percutaneous Vertebroplasty Versus Conservative Therapy

February 14, 2018 updated by: Clinical Research Office Imaging Division

VERTOS II. Percutaneous Vertebroplasty Versus Conservative Therapy in Patients With Osteoporotic Vertebral Fractures

Percutaneous vertebroplasty is a new procedure for treating painful osteoporotic compression fractures of the spine. Five-thousand out of 12.000 patients (16.000 vertebral fractures/year in the Netherlands) present with sudden, severe back pain in the region of the fracture.Until recently, bed rest, analgesia and physical support were the only treatment options. After decades of performing PV, no large RCT with mid-term follow-up has been published.

Design:

This will be a multicenter (6 centers), prospective, randomised, intervention study. Eligible patients will be randomised for percutaneous vertebroplasty or conservative therapy.

Study population:

Age: 50 and older, vertebral fracture, level: thoracic vertebral body 5 (Th 5) or lower, osteopenia (T-score < -1 SD), back pain for no more than 6 weeks and edema in the vertebrae on MR imaging

Statistical analyses All analyses will be performed on an 'intention to treat' principle. The planned number of subjects will be 200 in total, 100 in each intervention arm.

Economic evaluation:

Cost-effectiveness will be assessed. The costs of the procedure and the medical treatment, and of visits to medical specialists, GP's and physical therapists will be compared.

Time schedule:

The total study will take 36 months

Recruitment of patients (200) has been completed. In May 2009 the 1 year follow-up will be finished.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Design:

This will be a multicenter (6 centers), prospective, randomized, intervention study. Eligible patients will be randomized for percutaneous vertebroplasty or analgesics.

Study population:Two hundred patients will be included.

Patient selection:

Patients will be referred from the GP to the radiology department for acute back pain. The GP will order an X-ray of the thoracic and lumbar spine to establish an osteoporotic vertebral fracture(s). Subsequently, the hospital radiologist will pick out the cases with vertebral fracture(s). Subsequently, the general physician/ geriatrician will confirm the diagnosis of 'osteoporotic' vertebral fracture, and exclude other causes of vertebral fracture (e.g. tumour, major trauma). Finally, the patient and their GP will be asked to participate in our study.

Eligible patients will be randomized for percutaneous vertebroplasty (and pain medication if necessary) or only analgesics.

Procedure:

The treatment consists of a transpedicular injection of polymethylmethacrylate bone cement into the collapsed vertebral body (maximal 2 vertebrae in 1 treatment session) using fluoroscopic guidance. The procedure is performed under the use of local anesthetics and the patient can be discharged the same day or after 1 night of hospital stay.

Conventional treatment (analgesics):

The internist optimizes the use of analgesics in ascending order: (1) Paracetamol, (2) Tramadol, (3) Tramadol and Paracetamol, (4) Morphine.

All patients receive osteoporosis medication.

Outcome parameters:

The primary outcome for the clinical study as well as the economic evaluation will be adequate relief of pain. Pain intensity will be measured by means of a visual analogue scale (VAS). Relief of up to 3,0 to 4,4 scale points (scale 0-10) is associated with a clinically relevant pain reduction (Beurskens et al 1995). The main goal of the economic evaluation is to assess the balance between costs and effects of percutaneous vertebroplasty and pain medication as compared to usual care (analgesics, physiotherapy, visits to general practitioner) after 4 weeks and after 1 year.

The clinical research objectives are to compare the effects (1 day,1 week, 1 month, 3 months, 6 months,12 months and 24 months) of vertebroplasty with conventional therapy on a) back pain, b) activities of daily living (ADL), c) mood, d) general health and e) quality of life in patients with painful osteoporotic vertebral fractures. Other objectives are to study the 1 and 2-year incidence of recurrent fractures, especially adjacent to treated levels of

Measurements:

a), b), c), d) and e) are measured by using the visual analogue scale (VAS) for pain intensity, the Roland Disability Questionnaire (RDQ) for functional status, while, the EQ6D and the Qualeffo-41 focus on quality of life, mood and general health. Data will be collected about units of resource utilization with an explicit clause asking whether it can be related to the vertebral fracture.

(New) osteoporotic vertebral fractures are assessed at baseline by conventional radiography and magnetic resonance (MR) imaging. The incidence of recurrent fractures will be determined by conventional X-rays at 1,3,12 and 24 months.

Economic evaluation:

The goal of the economic evaluation is to assess the balance between costs and effects of vertebroplasty as compared to usual care.

We will initially perform a cost-effectiveness analysis with a one month time horizon. Given immediate pain relief in a majority after vertebroplasty, already a cost-effectiveness ratio can be calculated.

Estimates of other relevant outcomes such as costs and quality of life will also be entered in the model to allow a full economic evaluation. We will estimate incremental costs per additional year freed of pain of immediate vertebroplasty as compared to vertebroplasty after one month and (synthetic scenario of) care as usual. As the latter does involve extrapolation using estimates not actually observed in the trial we can not use bootstrap simulation to assess uncertainty. Accordingly, multivariate probabilistic sensitivity analysis (Monte carlo simulations) will be used to evaluate uncertainty in the cost-effectiveness ratios. As we will take into account a time horizon up till one year costs nor effects will be discounted. Finally, a cost-utility analysis is foreseen based on utility scores obtained over the first month of observation after randomization.

The direct medical costs will be estimated from a societal perspective. This implies that resource use such as GP visits, analgesics, physiotherapy and consultation of orthopedic surgeons or general physicians will be recorded in the CRF and in patient diaries. In parallel, actual costs of the resources, i.e., unit costs, will be estimated. The majority will be based on the estimates gathered in the Dutch guidelines for economic evaluation published by CVZ. Subsequently, multiplication of units costs with resource use will yield cost estimates on an individual patient level. With regard to costs due to losses in productivity we pose that the majority of patients does not have a paid job. Time spent by spouses, family and friends taking over certain household activities or other unpaid activities will be accounted for using shadow prices.

The primary outcome for the economic evaluation will be adequate relief of pain. Pain will be measured by means of a visual analogue scale (VAS). Relief of up to 3,0 to 4,4 scale points is considered adequate. Time until this outcome is attained will explicitly be accounted for in the economic evaluation.

In addition to pain, health related quality of life will be measured. Subsequent summation over the period of follow up will yield overall QALYs up to a year for each arm of the trial.

In the cost effectiveness analysis we will take care of the differences in the Belgium and Dutch healthcare system.

Statistical analyzes All analyzes will be performed on an intention to treat principle. In addition, analyzes will on the different outcomes will be compared between the two groups with the Student's t-test for continuous normally distributed variables, with the Mann-Whitney test for variables that are not normally distributed and with the chi² test for categorical variables. In addition, subgroups (e.g. long/shot duration of complaints) will be examined in which vertebroplasty has a more (or less) pronounced effect by introducing interaction terms in linear regression models with change in pain and quality of life as outcome variables.

The one-year cumulative incidence of new fractures adjacent to the treated/old fracture levels will be compared between patients who were treated with vertebroplasty and those who were not with Cox-proportional hazards analyzes, adjusting for confounders.

Power calculations:

The planned number of subjects will be 200 in total, 100 in each intervention arm. This number is based on conventional assumptions of alfa=0.05 and ß=0.20, withdrawal from intervention of 20%. Based on pilot data and literature we expect a difference of 25% in significant pain relief. If we assume that 20% withdraws from intervention we need approximately 100 patients in each group.

Time schedule:

The total study will take 36 months.

Recruitment of patients (200) has been completed. In May 2009 the 1 year follow-up will be finished.

Study Type

Interventional

Enrollment (Actual)

200

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Belgium
      • Gent, Belgium, 9000
        • AZ St. Lucas Ziekenhuis
  • Netherlands
      • Dordrecht, Netherlands, 3300 AK
        • Albert Schweizer ziekenhuis
      • Eindhoven, Netherlands, 5623 EJ
        • Catharina-ziekenhuis
      • Tilburg, Netherlands, 5022 GC
        • St. Elisabeth Ziekenhuis
      • Utrecht, Netherlands, 3508 GA
        • UMCU
    • Utrecht
      • Utrecht/Zeist/Doorn, Utrecht, Netherlands, 3508 TG
        • Diakonessenhuis

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

50 years and older (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion criteria:

  • age: 50 and older
  • vertebral fracture: 15-85% height loss
  • level: thoracic vertebral body 5 (Th 5) or lower
  • osteopenia (T-score < -1 SD)
  • back pain for at least no longer than 6 weeks
  • edema in the vertebrae on MR imaging

Exclusion criteria:

  • complete loss of vertebral body height
  • fracture through or destruction of the posterior vertebral wall
  • pressure of bone fragments on the spinal cord
  • osteomyelitis or spondylodiscitis
  • vertebral column neoplasms
  • uncorrectable coagulation disorder
  • medical conditions that would make the patient ineligible for emergency decompressive surgery should it be necessary to treat a complication of the procedure

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: TREATMENT
  • Allocation: RANDOMIZED
  • Interventional Model: PARALLEL
  • Masking: NONE

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
NO_INTERVENTION: 2
conservative therapy (no intervention)
ACTIVE_COMPARATOR: 1
Vertebroplasty
Procedure: Vertebroplasty

Procedure:

The treatment consists of a transpedicular injection of polymethylmethacrylate bone cement into the collapsed vertebral body (maximal 2 vertebrae in 1 treatment session) using fluoroscopic guidance. The procedure is performed under the use of local anesthetics and the patient can be discharged the same day or after 1 night of hospital stay.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
To compare the cost-effectivity in the two groups
Time Frame: 1 month, 1 year
1 month, 1 year
VAS score in time
Time Frame: 1 month, 1 year
1 month, 1 year

Secondary Outcome Measures

Outcome Measure
Time Frame
To compare pain relief and the quality of life of the patients in the two groups.
Time Frame: 1 day, 1 week, 1 month, 3 months, 6 months, 12 months and 24 months
1 day, 1 week, 1 month, 3 months, 6 months, 12 months and 24 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Clinical Research Office Imaging Division

Collaborators

ZonMw: The Netherlands Organisation for Health Research and Development

Investigators

  • Principal Investigator: Willem Mali, MD.PhD, UMC Utrecht

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

February 1, 2006

Study Completion (ACTUAL)

June 1, 2010

Study Registration Dates

First Submitted

September 30, 2005

First Submitted That Met QC Criteria

September 30, 2005

First Posted (ESTIMATE)

October 4, 2005

Study Record Updates

Last Update Posted (ACTUAL)

February 15, 2018

Last Update Submitted That Met QC Criteria

February 14, 2018

Last Verified

June 1, 2008

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 945-06-351

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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