Facet Joint ArthropathyNCT07629466
Association Between Trendelenburg Sign and Lumbar MRI Abnormalities
An observational study of Facet Joint Arthropathy and Lower Back Pain, run by Bahçeşehir University at 1 site in Turkey (Türkiye).
Trial summary
The Trendelenburg sign is a common clinical finding indicating hip abductor dysfunction and altered pelvic stability. The relationship between the Trendelenburg sign, spinopelvic biomechanics, hip muscle strength, and lumbar magnetic resonance imaging (MRI) abnormalities remains insufficiently understood. Read more about this study
- Who is it for?
- Ages 18 to 65 years
- Conditions the study is for
- Facet Joint Arthropathy, Lower Back Pain
- How many people
- 120 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 4 Jun 2026to 10 Oct 2026
- How long will I take part?
- 1 Day
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
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 to 65 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Adults aged 18-65 years with low back pain and available lumbar MRI scans obtained within the previous 12 months. Participants will undergo clinical assessment for Trendelenburg sign and hip function, and lumbar MRI evaluation for degenerative changes.
Who may be able to join
- Age between 18 and 65 years.
- Patients who have previously presented to the clinic with a complaint of low back pain.
- Willingness and ability to provide written informed consent for participation in the study.
- Availability of lumbar MRI images obtained within the previous 12 months and accessible for evaluation.
Who cannot join
- Presence of red flag conditions associated with low back pain, including malignancy, infection, acute trauma, or significant neurological deficits.
- History of lumbar spine surgery.
- Structural spinal anomalies such as sacralization or lumbarization.
- Spinal deformities, including scoliosis.
- Rheumatologic diseases affecting the spine (e.g., axial spondyloarthritis).
- Significant radiculopathy or advanced neurological deficits, and the presence of extruded or sequestrated lumbar disc herniation.
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- Clinically significant lumbar spinal stenosis.
- Spondylolysis and/or spondylolisthesis.
- Acute vertebral fracture, compression fracture, or recent fracture associated with severe osteoporosis.
- Hip or pelvic conditions that may directly influence the Trendelenburg sign, including: History of hip arthroplasty or hip surgery, advanced hip osteoarthritis, residual deformity following lower-extremity fracture, significant leg length discrepancy (>2 cm).
- Systemic or neuromuscular disorders, including multiple sclerosis, myopathies, amyotrophic lateral sclerosis (ALS), stroke, or peripheral neuropathies.
- Pregnancy.
- Severe knee or ankle pathology or other conditions causing substantial gait impairment.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
About this study
Official title: Association of the Trendelenburg Sign With Spinopelvic Biomechanics and Lumbar MRI Abnormalities"
The Trendelenburg sign is a common clinical finding indicating hip abductor dysfunction and altered pelvic stability. The relationship between the Trendelenburg sign, spinopelvic biomechanics, hip muscle strength, and lumbar magnetic resonance imaging (MRI) abnormalities remains insufficiently understood. This study aims to investigate the association between Trendelenburg sign positivity and lumbar MRI findings, including facet arthropathy, ligamentum flavum hypertrophy, multifidus muscle morphology, and psoas muscle characteristics, as well as spinopelvic biomechanical parameters and hip abductor muscle strength.
Read the detailed description
The Trendelenburg sign is a clinical indicator of hip abductor muscle dysfunction and altered pelvic stability. Changes in hip abductor function may affect spinopelvic biomechanics and contribute to lumbar degenerative changes. This prospective observational study aims to investigate the association between Trendelenburg sign positivity and lumbar MRI abnormalities in adults with chronic low back pain.
Participants will be classified as Trendelenburg-positive or Trendelenburg-negative based on clinical examination. Hip abductor muscle strength and lumbar MRI findings will be evaluated. MRI parameters will include the presence and severity of facet joint arthropathy, ligamentum flavum thickness, multifidus muscle thickness, and psoas muscle characteristics.
The primary objective is to determine whether a positive Trendelenburg sign is associated with lumbar facet arthropathy. Secondary objectives include evaluating the relationships between the Trendelenburg sign, hip abductor strength, and other lumbar MRI parameters. The findings may improve understanding of the biomechanical relationship between hip function and lumbar degeneration in patients with chronic low back pain.
- Conditions
- Facet Joint Arthropathy, Lower Back Pain
- Medical subject headings
- Low Back Pain
What is being measured
The primary outcome is the main question the study is designed to answer.
Presence and Severity of Lumbar Facet Joint Arthropathy
Assessment of the presence and severity of lumbar facet joint arthropathy on magnetic resonance imaging (MRI) and its association with Trendelenburg sign positivity.
Measured: Baseline
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted5 Jun 2026
- Study start4 Jun 2026 (estimated)
- Primary completion25 Aug 2026 (estimated)
- Study completion10 Oct 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Facet Joint ArthropathyStudies of the same condition, open and under way.
- 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
- Case-control
- Time perspective
- Cross-sectional
- Enrolment
- 120 participants (estimated)
- Target duration
- 1 Day
Sponsor and investigators
- Lead sponsor
- Bahçeşehir University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Zeynep Iyigun, Bahçeşehir University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07629466
- Sponsor's protocol ID
- BAU-FTR-2026-07/04
- Status last verified
- Jun 2026
- First submitted
- 1 Jun 2026
- Last updated
- 10 Jun 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: Individual participant data will not be shared to protect participant confidentiality and in accordance with institutional regulations.
Study at a glance
From the registry record, last updated by the sponsor on 10 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Association of the Trendelenburg Sign With Spinopelvic Biomechanics and Lumbar MRI Abnormalities"
- ClinicalTrials.gov ID
- NCT07629466
- Acronym / sponsor ID
- BAU-FTR-2026-07/04
- Conditions
- Facet Joint Arthropathy, Lower Back Pain
- Study type
- Observational
- Recruitment status
- Not yet recruiting
- Enrolment
- 120 participants (estimated)
- Lead sponsor
- Bahçeşehir UniversityUniversity, hospital or other
- Study start
- 4 Jun 2026 (estimated)
- Primary completion
- 25 Aug 2026 (estimated)
- Study completion
- 10 Oct 2026 (estimated)
- First posted
- 5 Jun 2026 (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.
The Trendelenburg sign is a common clinical finding indicating hip abductor dysfunction and altered pelvic stability. The relationship between the Trendelenburg sign, spinopelvic biomechanics, hip muscle strength, and lumbar magnetic resonance imaging (MRI) abnormalities remains insufficiently understood. This study aims to investigate the association between Trendelenburg sign positivity and lumbar MRI findings, including facet arthropathy, ligamentum flavum hypertrophy, multifidus muscle morphology, and psoas muscle characteristics, as well as spinopelvic biomechanical parameters and hip abductor muscle strength.
Detailed description
The Trendelenburg sign is a clinical indicator of hip abductor muscle dysfunction and altered pelvic stability. Changes in hip abductor function may affect spinopelvic biomechanics and contribute to lumbar degenerative changes. This prospective observational study aims to investigate the association between Trendelenburg sign positivity and lumbar MRI abnormalities in adults with chronic low back pain.
Participants will be classified as Trendelenburg-positive or Trendelenburg-negative based on clinical examination. Hip abductor muscle strength and lumbar MRI findings will be evaluated. MRI parameters will include the presence and severity of facet joint arthropathy, ligamentum flavum thickness, multifidus muscle thickness, and psoas muscle characteristics.
The primary objective is to determine whether a positive Trendelenburg sign is associated with lumbar facet arthropathy. Secondary objectives include evaluating the relationships between the Trendelenburg sign, hip abductor strength, and other lumbar MRI parameters. The findings may improve understanding of the biomechanical relationship between hip function and lumbar degeneration in patients with chronic low back pain.
Study design
- Observational model
- Case-control
- Time perspective
- Cross-sectional
- Target follow-up
- 1 Day
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Adults aged 18-65 years with low back pain and available lumbar MRI scans obtained within the previous 12 months. Participants will undergo clinical assessment for Trendelenburg sign and hip function, and lumbar MRI evaluation for degenerative changes.
Key inclusion criteria (4 listed)
- Age between 18 and 65 years.
- Patients who have previously presented to the clinic with a complaint of low back pain.
- Willingness and ability to provide written informed consent for participation in the study.
- Availability of lumbar MRI images obtained within the previous 12 months and accessible for evaluation.
Key exclusion criteria (13 listed)
- Presence of red flag conditions associated with low back pain, including malignancy, infection, acute trauma, or significant neurological deficits.
- History of lumbar spine surgery.
- Structural spinal anomalies such as sacralization or lumbarization.
- Spinal deformities, including scoliosis.
- Rheumatologic diseases affecting the spine (e.g., axial spondyloarthritis).
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Presence and Severity of Lumbar Facet Joint Arthropathy
Time frame: Baseline
Assessment of the presence and severity of lumbar facet joint arthropathy on magnetic resonance imaging (MRI) and its association with Trendelenburg sign positivity.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 10 Jun 2026.
- Individual participant dataSharing planned: No. Individual participant data will not be shared to protect participant confidentiality and in accordance with institutional regulations.
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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.
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 Facet Joint Arthropathy and Lower Back Pain, run by Bahçeşehir University at 1 site in Turkey (Türkiye).
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 4 inclusion and 13 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: opening soon, as of the sponsor's last update on 10 Jun 2026. 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 Turkey (Türkiye). 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?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact zeynep Iyigun, Prof. MD (+905056987368, zeynep.iyigun@bau.edu.tr), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Presence and Severity of Lumbar Facet Joint Arthropathy (time frame: Baseline). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
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 10 Jun 2026.