Low Back PainNCT07396012
Relation Between Degree of Lumbar Spine Curvature and Dynamic Knee Valgus in Smartphone Addicts
An observational study of Low Back Pain, run by Cairo University at 1 site in Egypt.
Trial summary
The purpose of this study will be to investigate the relation between degree of lumbar spine curvature and dynamic knee valgus angle in smartphone addict students with non-specific low back pain. Read more about this study
- Who is it for?
- Ages 18 to 25 years
- Conditions the study is for
- Low Back Pain
- How many people
- 68 participants
- Where
- 1 siteEgypt
- Study dates
- 7 Feb 2026to 14 Apr 2026
- 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 25 years
- All sexes
- No healthy volunteers
- Adult
Study population: Sixty-eight subjects who are smart phone addicted with non specific low back pain and are aged from 18 to 25 years old will be allocated into one group.
Who may be able to join
- Subjects from both genders with an age range between 18 and 25 years old.
- Sound physical and mental health.
- Body mass index 18.5 to 24.9 kg/m2.
- Subjects with chronic low back pain. Smart phone addiction.
Who cannot join
- Stroke
- Balance problems
- Visual problems
- Any other physical disorder that may affect our measurement
- Pregnancy
- Obesity
- Comorbidities such as cardiovascular or respiratory conditions
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: Relation Between Degree of Lumbar Spine Curvature and Dynamic Knee Valgus in Smartphone Addict With Non-specific Low Back Pain
The purpose of this study will be to investigate the relation between degree of lumbar spine curvature and dynamic knee valgus angle in smartphone addict students with non-specific low back pain.
Read the detailed description
Smartphone usage can potentially cause musculoskeletal disorders in the lower back. Continuous smartphone use has been shown to create proprioception impairments in the cervical vertebra and postural alterations in the cervical and lumbar vertebrae (slouched posture)
Understanding the relationship between lumbar spine curvature (hyperlordosis, hypolordosis) and knee valgus angle is crucial for:
- Preventing Musculoskeletal Disorders
- Excessive knee valgus increases knee injury risk.
- Abnormal lumbar curvature (hyper lordosis) may alter lower limb kinematics, contributing to knee malalignment.
- Improving Rehabilitation Strategies: If lumbar posture influences knee mechanics, interventions (such as core stabilization) could reduce valgus and injury risk.
- Ergonomics: Sedentary lifestyles and poor posture may exacerbate both spinal misalignment and knee valgus, increasing osteoarthritis risk.
- Conditions
- Low Back Pain
- Medical subject headings
- Low Back Pain
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Other
| Study group | Role | What they receive |
|---|---|---|
| Smartphone Addict With Non Specific Low Back Pain | Sixty-eight subjects who are Smartphone Addict With Non Specific Low Back Pain and aged from 18 to 25 years old will be allocated into one group |
What is being measured
The primary outcome is the main question the study is designed to answer.
Lumbar spinal curvature
Kinovea software program will be used to assess lumbar curvature mainly the cobb angle of lumbar lordosis.
Colored markers can be placed on key anatomical landmarks ( spinous processes of L1-L5) while the subject stands in a relaxed, natural posture with feet shoulder-width apart.
the image will be captured from a lateral (side) view of the spine. and the Kinovea software will analyze and measure angle. Normal Lumbar Lordosis: ~30-60° (varies by method), hyperlordosis: >60° (excessive curvature), hypolordosis (Flat Back): <30° (reduced curvature).
Measured: 8 weeks
Secondary outcomes (4)
Assessment of pain intensity
A visual analogue scale (VAS) will be used to measure the intensity of low back pain. With a score of 0 for no pain and 10 for the worst pain ever. Patients rated their level of pain as mild if they scored 3.4 or less, moderate if they scored 3.5 to 7.4, and severe if they scored 7.5 or higher.
Measured: 8 weeks
Assessment of smart phone addiction
The smart phone addiction scale (SAS) will be used to assess smartphone addiction.
This is a valid and reliable 10-question measure for diagnosing smartphone addiction. Each question has a potential value ranging from 1 to 6, and the overall questionnaire score can range from 10 to 60 points. A score of 34 is regarded a cut-off for smartphone addiction, with higher values suggesting stronger addiction.
Measured: 8 weeks
Assessment of quadriceps muscle strength
Hand held dynamometer will be used to assess quadriceps muscle strength. The patient sat on a chair with 90° hip/knee flexion; dynamometer placed 2-5 centimeters above malleoli on anterior tibia. the patient will be asked to push your leg forward as hard as possible.
Test execution:
Contraction Type: Isometric (hold 3-5 seconds (sec)). Trials: 3 repetitions (30-sec rest between trials). Recording: Peak force from the best of 3 trials. Normal measuring: Men: ~35-45 kg (77-99 lbs). Women: ~25-35 kg (55-77 lbs)
Measured: 8 weeks
Assessment of dynamic knee valgus angle
Kinovea software will be used to assess the dynamic knee valgus angle from a frontal view during a single-leg squat. Marks will be placed on hip at anterior superior iliac spine, Knee midpoint, and ankle midpoint. Measure the angle between the hip-knee-ankle line (180° = neutral, <180° = valgus). The depth of the squat task to 60°will be determined by placing a block behind the participant, and the gluteal muscles contact the block at 60° knee flexion. The non-dominant leg will be held with 90° knee flexion and 45° hip flexion during the whole task. The test will be considered successful if: 1) the person maintains the correct position during the test; 2) he performs the test at the predetermined pace; 3) the suspended leg does not touch the ground; 4) the heel of the dominant foot rests on the ground.
Measured: 8 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 Feb 2026
- Study start7 Feb 2026 (estimated)
- Primary completion7 Apr 2026 (estimated)
- Study completion14 Apr 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Low Back PainStudies of the same condition, open and under way.
- More trials run by Cairo UniversityThe 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
- Other
- Time perspective
- Cross-sectional
- Enrolment
- 68 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Cairo University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Dawlat Mazen Mahmoud Zidan, Cairo University
- Investigators
- Rabab Monged, PHD, Study director, October 6 UniversityAlaa Balbaa, Professor, Study chair, Cairo University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07396012
- Sponsor's protocol ID
- P.T.REC/012/006139
- Status last verified
- Feb 2026
- First submitted
- 1 Feb 2026
- Last updated
- 9 Feb 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 9 Feb 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Relation Between Degree of Lumbar Spine Curvature and Dynamic Knee Valgus in Smartphone Addict With Non-specific Low Back Pain
- ClinicalTrials.gov ID
- NCT07396012
- Acronym / sponsor ID
- P.T.REC/012/006139
- Conditions
- Low Back Pain
- Study type
- Observational
- Recruitment status
- Not yet recruiting
- Enrolment
- 68 participants (estimated)
- Lead sponsor
- Cairo UniversityUniversity, hospital or other
- Study start
- 7 Feb 2026 (estimated)
- Primary completion
- 7 Apr 2026 (estimated)
- Study completion
- 14 Apr 2026 (estimated)
- First posted
- 9 Feb 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 purpose of this study will be to investigate the relation between degree of lumbar spine curvature and dynamic knee valgus angle in smartphone addict students with non-specific low back pain.
Detailed description
Smartphone usage can potentially cause musculoskeletal disorders in the lower back. Continuous smartphone use has been shown to create proprioception impairments in the cervical vertebra and postural alterations in the cervical and lumbar vertebrae (slouched posture)
Understanding the relationship between lumbar spine curvature (hyperlordosis, hypolordosis) and knee valgus angle is crucial for:
- Preventing Musculoskeletal Disorders
- Excessive knee valgus increases knee injury risk.
- Abnormal lumbar curvature (hyper lordosis) may alter lower limb kinematics, contributing to knee malalignment.
- Improving Rehabilitation Strategies: If lumbar posture influences knee mechanics, interventions (such as core stabilization) could reduce valgus and injury risk.
- Ergonomics: Sedentary lifestyles and poor posture may exacerbate both spinal misalignment and knee valgus, increasing osteoarthritis risk.
Study design
- Observational model
- Other
- Time perspective
- Cross-sectional
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Smartphone Addict With Non Specific Low Back Pain | – | –Sixty-eight subjects who are Smartphone Addict With Non Specific Low Back Pain and aged from 18 to 25 years old will be allocated into one group |
Who may qualify
- Ages
- 18 to 25 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult
- Study population
- Sixty-eight subjects who are smart phone addicted with non specific low back pain and are aged from 18 to 25 years old will be allocated into one group.
Key inclusion criteria (4 listed)
- Subjects from both genders with an age range between 18 and 25 years old.
- Sound physical and mental health.
- Body mass index 18.5 to 24.9 kg/m2.
- Subjects with chronic low back pain. Smart phone addiction.
Key exclusion criteria (7 listed)
- Stroke
- Balance problems
- Visual problems
- Any other physical disorder that may affect our measurement
- Pregnancy
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 |
|---|---|---|
| Other | Smartphone Addict With Non Specific Low Back Pain |
Primary outcome
Lumbar spinal curvature
Time frame: 8 weeks
Kinovea software program will be used to assess lumbar curvature mainly the cobb angle of lumbar lordosis. Colored markers can be placed on key anatomical landmarks ( spinous processes of L1-L5) while the subject stands in a relaxed, natural posture with feet shoulder-width apart. the image will be captured from a lateral (side) view of the spine. and the Kinovea software will analyze and measure angle. Normal Lumbar Lordosis: ~30-60° (varies by method), hyperlordosis: >60° (excessive curvature), hypolordosis (Flat Back): <30° (reduced curvature).
4 secondary outcomes
Assessment of pain intensity
Time frame: 8 weeks
Assessment of smart phone addiction
Time frame: 8 weeks
Assessment of quadriceps muscle strength
Time frame: 8 weeks
Assessment of dynamic knee valgus angle
Time frame: 8 weeks
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 9 Feb 2026.
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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.
Rabab Monged, PHD study director
October 6 University
Alaa Balbaa, Professor study chair
Cairo University
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 Low Back Pain, run by Cairo University at 1 site in Egypt.
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 7 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 9 Feb 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 Egypt. 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 Dawlat M Mahmoud, Master (01002757708, dawlat.mazen96@gmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Lumbar spinal curvature (time frame: 8 weeks). 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 9 Feb 2026.