Spondylolisthesis DegenerativeNCT04174144
The Effect of Lordosis on Clinical Outcome After Spinal Fusion for One-level Degenerative Spondylolysthesis
An observational study of Spondylolisthesis Degenerative and Spinal Fusion, run by University Medical Centre Ljubljana at 1 site in Slovenia.
Trial summary
Degenerative spondylolisthesis is a common spinal degenerative disease. It is defined as the slippage of one vertebrae on the vertebrae bellow. In the process of spinal ageing and spinal joint degeneration, the spine becomes subjected to degenerative development that results in joint instability, shifting of vertebrae… Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Spondylolisthesis Degenerative, Spinal Fusion
- What is being tested?
- Single-level TLIF
- Type of treatment
- Surgery or procedure
- How many people
- 32 participants
- Where
- 1 siteSlovenia
- Study dates
- 12 Dec 2019to 23 Jun 2023
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Participants will be selected from patients who underwent a single-level TLIF procedure at Department of Orthopaedic surgery of Ljubljana University medical centre between 2011 and 2013.
Who may be able to join
- Patients with one-level degenerative spondylolysthesis treated with single-level TLIF at Department of Orthopaedic surgery of Ljubljana University medical centre between 2011 and 2013.
- TLIF performed at L3/4 or L4/5
Who cannot join
- Patients who refuse to participate in study or do not respond to our invitation
- Patients with additional instrumental spinal surgery or spinal trauma
- Patients with additional types of adult spinal deformity
- Patients with inflammatory spinal conditions
- Patients with flexion contractures of the hips or knees
Trial locations and contacts
1 site in 1 country.
About this study
Official title: The Effect of Lordosis on Long-term Clinical Outcome and Sagittal Balance Parameters After TLIF for One-level Degenerative Spondylolysthesis
Degenerative spondylolisthesis is a common spinal degenerative disease. It is defined as the slippage of one vertebrae on the vertebrae bellow. In the process of spinal ageing and spinal joint degeneration, the spine becomes subjected to degenerative development that results in joint instability, shifting of vertebrae and can be responsible for a progressive kyphosis of the lumbar spine and sagittal imbalance with forward inclination of the trunk and chronic low back pain development. To address these changes and restore stability, lumbar spinal fusion has been developed and is nowadays a common procedure for unstable degenerative spine disorders.
In the past several years, studies that highlight the importance of sagittal balance analysis with the restoration of adequate lumbar lordosis, have emerged. However, it remains a challenge to determine the correct amount of lumbar lordosis that is required for each patient to maintain optimal post-fusion sagittal balance. Additionally, the relationship between pelvic incidence (PI) and impact of LL correction has been highlighted in literature. The position of fused vertebrae is of paramount importance, as sagittal alignment should be done with minimizing muscle work during posture. Failure to reach proper sagittal balance can result in compensatory mechanisms such as increased pelvic tilt (PT), cervical and thoracic segment hyperextension, and knee flexion. These compensatory mechanisms have adverse effects such as chronic pain, disability and muscle fatigue.
With this study the investigators aim to analyze long-term clinical and spinopelvic radiographic parameter outcomes of patients who underwent a one-level spinal fusion procedure for single level degenerative spondylolisthesis disease at a single institution.
Read the detailed description
TLIF (transforaminal interbody fusion) is a safe and effective treatment option for single-level lumbar degenerative disease. It is less invasive, yields good outcomes and has fewer complications after long-term follow up compared to other fusion techniques. In literature, many studies have compared sagittal parameters and functional outcomes in single-level TLIF surgery. In most literature reports, however, the fusion was performed at different lumbar levels, depending on the characteristics of the studied cohort. As demonstrated by Roussouly et. al. in the asymptomatic population, the L4 vertebra represents the apex of lumbar lordosis and is the most suitable site for lordosis correction. There are several reported surgical techniques and methods to obtain adequate lordosis correction during TLIF.
At Department of Orthopaedic surgery of Ljubljana University medical centre, TLIF is performed using a consistent brand of instrumentation. In knee-chest position, polyaxial pedicle screws (Xia®, Stryker Spine, Allendale, NJ, USA), combined with a crescent-shaped interbody cage (T-Plus®, Pioneer Surgical Technology, Marquette, MI, USA), bilateral facet joint removal and laminectomy on both sides are used. Compression over the rods is performed to obtain adequate segmental lordosis. The angle of lordosis correction is calculated according Schwab's formula (ideal lumbar lordosis (LL) = pelvic incidence (PI) + 9).
There is little published information regarding cohorts with long-term evaluation. As many authors suggested, changes in lordotic parameters can become clinically evident several years after the procedure. With this study's cohort analysis, a rarely reported link between spinopelvic parameters and long-term clinical evaluation will be demonstrated. Selected participants will be analyzed using the same protocol as preoperatively. A clinical examination will be made, ODI questionnaires will be administered and radiographic parameters on full-standing lateral radiographs, will be analyzed. Changes between preoperative and long-term postoperative parameters will be calculated and compared. For statistical analysis paired t-test and Pearson correlation will be used. All statistical tests will be two tailed and significance will be set at p<0.05.
- Conditions
- Spondylolisthesis Degenerative, Spinal Fusion
- Being tested
- Single-level TLIF
- Keywords
- Sagittal balance, Lumbar lordosis, Clinical outcomes
- Medical subject headings
- Lordosis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Single-level TLIFProcedure or surgery
Transforaminal interbody fusion approach, using polyaxial pedicle screws (Xia®, Stryker Spine, Allendale, NJ, USA), combined with a crescent-shaped interbody cage (T-Plus®, Pioneer Surgical Technology, Marquette, MI, USA), bilateral facet joint removal and laminectomy.
| Study group | Role | What they receive |
|---|---|---|
| TLIF group | Participants with degenerative spondylolysthesis who underwent a single-level TLIF procedure. Receives: Procedure: Single-level TLIF |
What is being measured
The primary outcome is the main question the study is designed to answer.
ODI questionnaire
The Oswestry Disability Index is an important tool that researchers and disability evaluators use to measure a patient's permanent functional disability. The test is considered the 'gold standard' of low back functional outcome tools. For each section the total possible score is 5. If all 10 sections are completed the maximal score is 50.
Measured: 7-9 years after TLIF procedure
LL
Radiographic evaluation of lumbar lordosis (LL): the angle between the upper endplate of the first lumbar vertebrae (L1) and the sacral endplate (S1).
Measured: 7-9 years after TLIF procedure
SL
Radiographic evaluation of segmental lordosis (SL): the angle between the cranial endplate of the upper and caudal endplate of the lower vertebrae of the operated segment.
Measured: 7-9 years after TLIF procedure
Secondary outcomes (3)
PT
Radiographic evaluation of pelvic tilt (PT): the angle between the vertical line and the line going through the middle of the femoral heads and the middle point of the sacral endplate.
Measured: 7-9 years after TLIF procedure
SS
Radiographic evaluation of sacral slope (SS): the angle between sacral endplate and the horizontal line.
Measured: 7-9 years after TLIF procedure
SVA
Radiographic evaluation of sagittal vertical axis (SVA): a horizontal distance between the posterior end of the sacral endplate and the vertical line extended through the middle of seventh cervical vertebrae.
Measured: 7-9 years after TLIF procedure
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted22 Nov 2019
- Study start12 Dec 2019
- Primary completion22 Dec 2022
- Study completion23 Jun 2023
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (15)Papers the sponsor has linked to this study.
- Other trials for Spondylolisthesis DegenerativeStudies of the same condition, open and under way.
- More trials run by University Medical Centre LjubljanaThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 32 participants (actual)
Sponsor and investigators
- Lead sponsor
- University Medical Centre Ljubljana
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Klemen Bošnjak, University Medical Centre Ljubljana
- Investigators
- Rok Vengust, M.D, PhD, Study chair, Department of Orthopaedic surgery, University Medical Centre Ljubljana
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04174144
- Sponsor's protocol ID
- 0120-259/2019/6
- Status last verified
- Jun 2023
- First submitted
- 20 Nov 2019
- Last updated
- 27 Jun 2023
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: All IPD that underlie results in a publication and are in accordance with ethical standards of the National ethics committee of Slovenia on human experimentation and with the Helsinki Declaration of 1975.
Publications
Barrey C, Roussouly P, Le Huec JC, D'Acunzi G, Perrin G. Compensatory mechanisms contributing to keep the sagittal balance of the spine. Eur Spine J. 2013 Nov;22 Suppl 6(Suppl 6):S834-41. doi: 10.1007/s00586-013-3030-z. Epub 2013 Sep 20.
PubMed 24052406Barrey C, Darnis A. Current strategies for the restoration of adequate lordosis during lumbar fusion. World J Orthop. 2015 Jan 18;6(1):117-26. doi: 10.5312/wjo.v6.i1.117. eCollection 2015 Jan 18.
PubMed 25621216Cheng X, Zhang F, Zhang K, Sun X, Zhao C, Li H, Li YM, Zhao J. Effect of Single-Level Transforaminal Lumbar Interbody Fusion on Segmental and Overall Lumbar Lordosis in Patients with Lumbar Degenerative Disease. World Neurosurg. 2018 Jan;109:e244-e251. doi: 10.1016/j.wneu.2017.09.154. Epub 2017 Oct 5.
PubMed 28987851Ferrero E, Ould-Slimane M, Gille O, Guigui P; French Spine Society (SFCR). Sagittal spinopelvic alignment in 654 degenerative spondylolisthesis. Eur Spine J. 2015 Jun;24(6):1219-27. doi: 10.1007/s00586-015-3778-4. Epub 2015 Feb 5.
PubMed 25652553Fairbank JC, Pynsent PB. The Oswestry Disability Index. Spine (Phila Pa 1976). 2000 Nov 15;25(22):2940-52; discussion 2952. doi: 10.1097/00007632-200011150-00017.
PubMed 11074683Kuhta M, Bosnjak K, Vengust R. Failure to maintain segmental lordosis during TLIF for one-level degenerative spondylolisthesis negatively affects clinical outcome 5 years postoperatively: a prospective cohort of 57 patients. Eur Spine J. 2019 Apr;28(4):745-750. doi: 10.1007/s00586-019-05890-w. Epub 2019 Jan 24.
PubMed 30680634Le Huec JC, Aunoble S, Philippe L, Nicolas P. Pelvic parameters: origin and significance. Eur Spine J. 2011 Sep;20 Suppl 5(Suppl 5):564-71. doi: 10.1007/s00586-011-1940-1. Epub 2011 Aug 10.
PubMed 21830079Le Huec JC, Faundez A, Dominguez D, Hoffmeyer P, Aunoble S. Evidence showing the relationship between sagittal balance and clinical outcomes in surgical treatment of degenerative spinal diseases: a literature review. Int Orthop. 2015 Jan;39(1):87-95. doi: 10.1007/s00264-014-2516-6. Epub 2014 Sep 6.
PubMed 25192690Le Huec JC, Hasegawa K. Normative values for the spine shape parameters using 3D standing analysis from a database of 268 asymptomatic Caucasian and Japanese subjects. Eur Spine J. 2016 Nov;25(11):3630-3637. doi: 10.1007/s00586-016-4485-5. Epub 2016 Mar 7.
PubMed 26951168Liang Y, Shi W, Jiang C, Chen Z, Liu F, Feng Z, Jiang X. Clinical outcomes and sagittal alignment of single-level unilateral instrumented transforaminal lumbar interbody fusion with a 4 to 5-year follow-up. Eur Spine J. 2015 Nov;24(11):2560-6. doi: 10.1007/s00586-015-3933-y. Epub 2015 Apr 14.
PubMed 25870077Morvan G, Mathieu P, Vuillemin V, Guerini H, Bossard P, Zeitoun F, Wybier M. Standardized way for imaging of the sagittal spinal balance. Eur Spine J. 2011 Sep;20 Suppl 5(Suppl 5):602-8. doi: 10.1007/s00586-011-1927-y. Epub 2011 Aug 10.
PubMed 21830081Ould-Slimane M, Lenoir T, Dauzac C, Rillardon L, Hoffmann E, Guigui P, Ilharreborde B. Influence of transforaminal lumbar interbody fusion procedures on spinal and pelvic parameters of sagittal balance. Eur Spine J. 2012 Jun;21(6):1200-6. doi: 10.1007/s00586-011-2124-8. Epub 2011 Dec 17.
PubMed 22179755Roussouly P, Pinheiro-Franco JL. Biomechanical analysis of the spino-pelvic organization and adaptation in pathology. Eur Spine J. 2011 Sep;20 Suppl 5(Suppl 5):609-18. doi: 10.1007/s00586-011-1928-x. Epub 2011 Aug 2.
PubMed 21809016Schwab F, Lafage V, Patel A, Farcy JP. Sagittal plane considerations and the pelvis in the adult patient. Spine (Phila Pa 1976). 2009 Aug 1;34(17):1828-33. doi: 10.1097/BRS.0b013e3181a13c08.
PubMed 19644334Tye EY, Alentado VJ, Mroz TE, Orr RD, Steinmetz MP. Comparison of Clinical and Radiographic Outcomes in Patients Receiving Single-Level Transforaminal Lumbar Interbody Fusion With Removal of Unilateral or Bilateral Facet Joints. Spine (Phila Pa 1976). 2016 Sep;41(17):E1039-E1045. doi: 10.1097/BRS.0000000000001535.
PubMed 26926356
Study at a glance
From the registry record, last updated by the sponsor on 27 Jun 2023. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effect of Lordosis on Long-term Clinical Outcome and Sagittal Balance Parameters After TLIF for One-level Degenerative Spondylolysthesis
- ClinicalTrials.gov ID
- NCT04174144
- Acronym / sponsor ID
- 0120-259/2019/6
- Conditions
- Spondylolisthesis Degenerative, Spinal Fusion
- Keywords
- Sagittal balance, Lumbar lordosis, Clinical outcomes
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 32 participants (actual)
- Lead sponsor
- University Medical Centre LjubljanaUniversity, hospital or other
- Study start
- 12 Dec 2019 (actual)
- Primary completion
- 22 Dec 2022 (actual)
- Study completion
- 23 Jun 2023 (actual)
- First posted
- 22 Nov 2019 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Degenerative spondylolisthesis is a common spinal degenerative disease. It is defined as the slippage of one vertebrae on the vertebrae bellow. In the process of spinal ageing and spinal joint degeneration, the spine becomes subjected to degenerative development that results in joint instability, shifting of vertebrae and can be responsible for a progressive kyphosis of the lumbar spine and sagittal imbalance with forward inclination of the trunk and chronic low back pain development. To address these changes and restore stability, lumbar spinal fusion has been developed and is nowadays a common procedure for unstable degenerative spine disorders.
In the past several years, studies that highlight the importance of sagittal balance analysis with the restoration of adequate lumbar lordosis, have emerged. However, it remains a challenge to determine the correct amount of lumbar lordosis that is required for each patient to maintain optimal post-fusion sagittal balance. Additionally, the relationship between pelvic incidence (PI) and impact of LL correction has been highlighted in literature. The position of fused vertebrae is of paramount importance, as sagittal alignment should be done with minimizing muscle work during posture. Failure to reach proper sagittal balance can result in compensatory mechanisms such as increased pelvic tilt (PT), cervical and thoracic segment hyperextension, and knee flexion. These compensatory mechanisms have adverse effects such as chronic pain, disability and muscle fatigue.
With this study the investigators aim to analyze long-term clinical and spinopelvic radiographic parameter outcomes of patients who underwent a one-level spinal fusion procedure for single level degenerative spondylolisthesis disease at a single institution.
Detailed description
TLIF (transforaminal interbody fusion) is a safe and effective treatment option for single-level lumbar degenerative disease. It is less invasive, yields good outcomes and has fewer complications after long-term follow up compared to other fusion techniques. In literature, many studies have compared sagittal parameters and functional outcomes in single-level TLIF surgery. In most literature reports, however, the fusion was performed at different lumbar levels, depending on the characteristics of the studied cohort. As demonstrated by Roussouly et. al. in the asymptomatic population, the L4 vertebra represents the apex of lumbar lordosis and is the most suitable site for lordosis correction. There are several reported surgical techniques and methods to obtain adequate lordosis correction during TLIF.
At Department of Orthopaedic surgery of Ljubljana University medical centre, TLIF is performed using a consistent brand of instrumentation. In knee-chest position, polyaxial pedicle screws (Xia®, Stryker Spine, Allendale, NJ, USA), combined with a crescent-shaped interbody cage (T-Plus®, Pioneer Surgical Technology, Marquette, MI, USA), bilateral facet joint removal and laminectomy on both sides are used. Compression over the rods is performed to obtain adequate segmental lordosis. The angle of lordosis correction is calculated according Schwab's formula (ideal lumbar lordosis (LL) = pelvic incidence (PI) + 9).
There is little published information regarding cohorts with long-term evaluation. As many authors suggested, changes in lordotic parameters can become clinically evident several years after the procedure. With this study's cohort analysis, a rarely reported link between spinopelvic parameters and long-term clinical evaluation will be demonstrated. Selected participants will be analyzed using the same protocol as preoperatively. A clinical examination will be made, ODI questionnaires will be administered and radiographic parameters on full-standing lateral radiographs, will be analyzed. Changes between preoperative and long-term postoperative parameters will be calculated and compared. For statistical analysis paired t-test and Pearson correlation will be used. All statistical tests will be two tailed and significance will be set at p<0.05.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| TLIF group | – | Procedure: Single-level TLIFParticipants with degenerative spondylolysthesis who underwent a single-level TLIF procedure. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Participants will be selected from patients who underwent a single-level TLIF procedure at Department of Orthopaedic surgery of Ljubljana University medical centre between 2011 and 2013.
Key inclusion criteria (2 listed)
- Patients with one-level degenerative spondylolysthesis treated with single-level TLIF at Department of Orthopaedic surgery of Ljubljana University medical centre between 2011 and 2013.
- TLIF performed at L3/4 or L4/5
Key exclusion criteria (5 listed)
- Patients who refuse to participate in study or do not respond to our invitation
- Patients with additional instrumental spinal surgery or spinal trauma
- Patients with additional types of adult spinal deformity
- Patients with inflammatory spinal conditions
- Patients with flexion contractures of the hips or knees
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Single-level TLIFTransforaminal interbody fusion approach, using polyaxial pedicle screws (Xia®, Stryker Spine, Allendale, NJ, USA), combined with a crescent-shaped interbody cage (T-Plus®, Pioneer Surgical Technology, Marquette, MI, USA), bilateral facet joint removal and laminectomy. | Procedure or surgery | TLIF group |
Primary outcome
ODI questionnaire
Time frame: 7-9 years after TLIF procedure
The Oswestry Disability Index is an important tool that researchers and disability evaluators use to measure a patient's permanent functional disability. The test is considered the 'gold standard' of low back functional outcome tools. For each section the total possible score is 5. If all 10 sections are completed the maximal score is 50.
LL
Time frame: 7-9 years after TLIF procedure
Radiographic evaluation of lumbar lordosis (LL): the angle between the upper endplate of the first lumbar vertebrae (L1) and the sacral endplate (S1).
SL
Time frame: 7-9 years after TLIF procedure
Radiographic evaluation of segmental lordosis (SL): the angle between the cranial endplate of the upper and caudal endplate of the lower vertebrae of the operated segment.
3 secondary outcomes
PT
Time frame: 7-9 years after TLIF procedure
SS
Time frame: 7-9 years after TLIF procedure
SVA
Time frame: 7-9 years after TLIF procedure
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 27 Jun 2023.
- Background: PubMed 24052406Barrey C, Roussouly P, Le Huec JC, D'Acunzi G, Perrin G. Compensatory mechanisms contributing to keep the sagittal balance of the spine. Eur Spine J. 2013 Nov;22 Suppl 6(Suppl 6):S834-41. doi: 10.1007/s00586-013-3030-z. Epub 2013 Sep 20.
- Background: PubMed 25621216Barrey C, Darnis A. Current strategies for the restoration of adequate lordosis during lumbar fusion. World J Orthop. 2015 Jan 18;6(1):117-26. doi: 10.5312/wjo.v6.i1.117. eCollection 2015 Jan 18.
- Background: PubMed 28987851Cheng X, Zhang F, Zhang K, Sun X, Zhao C, Li H, Li YM, Zhao J. Effect of Single-Level Transforaminal Lumbar Interbody Fusion on Segmental and Overall Lumbar Lordosis in Patients with Lumbar Degenerative Disease. World Neurosurg. 2018 Jan;109:e244-e251. doi: 10.1016/j.wneu.2017.09.154. Epub 2017 Oct 5.
- Background: PubMed 25652553Ferrero E, Ould-Slimane M, Gille O, Guigui P; French Spine Society (SFCR). Sagittal spinopelvic alignment in 654 degenerative spondylolisthesis. Eur Spine J. 2015 Jun;24(6):1219-27. doi: 10.1007/s00586-015-3778-4. Epub 2015 Feb 5.
- Background: PubMed 11074683Fairbank JC, Pynsent PB. The Oswestry Disability Index. Spine (Phila Pa 1976). 2000 Nov 15;25(22):2940-52; discussion 2952. doi: 10.1097/00007632-200011150-00017.
- Background: PubMed 30680634Kuhta M, Bosnjak K, Vengust R. Failure to maintain segmental lordosis during TLIF for one-level degenerative spondylolisthesis negatively affects clinical outcome 5 years postoperatively: a prospective cohort of 57 patients. Eur Spine J. 2019 Apr;28(4):745-750. doi: 10.1007/s00586-019-05890-w. Epub 2019 Jan 24.
- Background: PubMed 21830079Le Huec JC, Aunoble S, Philippe L, Nicolas P. Pelvic parameters: origin and significance. Eur Spine J. 2011 Sep;20 Suppl 5(Suppl 5):564-71. doi: 10.1007/s00586-011-1940-1. Epub 2011 Aug 10.
- Background: PubMed 25192690Le Huec JC, Faundez A, Dominguez D, Hoffmeyer P, Aunoble S. Evidence showing the relationship between sagittal balance and clinical outcomes in surgical treatment of degenerative spinal diseases: a literature review. Int Orthop. 2015 Jan;39(1):87-95. doi: 10.1007/s00264-014-2516-6. Epub 2014 Sep 6.
- Background: PubMed 26951168Le Huec JC, Hasegawa K. Normative values for the spine shape parameters using 3D standing analysis from a database of 268 asymptomatic Caucasian and Japanese subjects. Eur Spine J. 2016 Nov;25(11):3630-3637. doi: 10.1007/s00586-016-4485-5. Epub 2016 Mar 7.
- Background: PubMed 25870077Liang Y, Shi W, Jiang C, Chen Z, Liu F, Feng Z, Jiang X. Clinical outcomes and sagittal alignment of single-level unilateral instrumented transforaminal lumbar interbody fusion with a 4 to 5-year follow-up. Eur Spine J. 2015 Nov;24(11):2560-6. doi: 10.1007/s00586-015-3933-y. Epub 2015 Apr 14.
- Background: PubMed 21830081Morvan G, Mathieu P, Vuillemin V, Guerini H, Bossard P, Zeitoun F, Wybier M. Standardized way for imaging of the sagittal spinal balance. Eur Spine J. 2011 Sep;20 Suppl 5(Suppl 5):602-8. doi: 10.1007/s00586-011-1927-y. Epub 2011 Aug 10.
- Background: PubMed 22179755Ould-Slimane M, Lenoir T, Dauzac C, Rillardon L, Hoffmann E, Guigui P, Ilharreborde B. Influence of transforaminal lumbar interbody fusion procedures on spinal and pelvic parameters of sagittal balance. Eur Spine J. 2012 Jun;21(6):1200-6. doi: 10.1007/s00586-011-2124-8. Epub 2011 Dec 17.
- Individual participant dataSharing planned: Yes. All IPD that underlie results in a publication and are in accordance with ethical standards of the National ethics committee of Slovenia on human experimentation and with the Helsinki Declaration of 1975.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Rok Vengust, M.D, PhD study chair
Department of Orthopaedic surgery, University Medical Centre Ljubljana
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Spondylolisthesis Degenerative and Spinal Fusion, run by University Medical Centre Ljubljana at 1 site in Slovenia.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 27 Jun 2023. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Slovenia. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
ODI questionnaire (time frame: 7-9 years after TLIF procedure). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT04174144, which also lists 15 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 27 Jun 2023.