Obesity / OverweightNCT07826442
Obesity Awareness, Weight Status, and Lifestyle Behaviors Among Adolescents
An observational study of Obesity / Overweight, run by Bekir Sami Uyanık at 1 site in Turkey (Türkiye).
Trial summary
This school-based cross-sectional study evaluated the relationship between obesity awareness, weight status, and lifestyle behaviors among adolescents aged 15-17 years. A total of 751 students from public and private high schools in Istanbul participated. Read more about this study
- Who is it for?
- Ages 15 to 17 years
- Conditions the study is for
- Obesity / Overweight
- What is being tested?
- Assessment of Obesity Awareness and Lifestyle Behaviors
- How many people
- 751 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 1 Sep 2019to 30 Nov 2019
- 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 15 to 17 years
- All sexes
- No healthy volunteers
- Child
Study population: Adolescents aged 15-17 years attending participating public and private high schools in Ümraniye, Istanbul, Türkiye. Participants were recruited using a voluntary non-probability sampling approach and included students who met the eligibility criteria and provided the required consent.
Who may be able to join
None listed.
Who cannot join
- Declined participation in the study.
- Absence of parental informed consent.
- Communication or cognitive difficulties preventing completion of the questionnaire.
- Students enrolled in 12th grade (excluded because of examination-related constraints).
Trial locations and contacts
1 site in 1 country.
Turkey (Türkiye)1 site
Participating Public and Private High Schools in Ümraniye
Istanbul, Istanbul, 34768
About this study
Official title: Associations Between Obesity Awareness, Weight Status, and Lifestyle Behaviors Among Adolescents: A School-Based Cross-Sectional Study
This school-based cross-sectional study evaluated the relationship between obesity awareness, weight status, and lifestyle behaviors among adolescents aged 15-17 years. A total of 751 students from public and private high schools in Istanbul participated. Sociodemographic characteristics, dietary habits, physical activity, screen exposure, sleep duration, and obesity awareness were assessed using structured questionnaires, and standardized anthropometric measurements were performed. The study also examined whether obesity awareness differed according to body mass index category and whether family and socioeconomic factors were associated with obesity awareness and excess weight.
Read the detailed description
Adolescent obesity is a multifactorial public health problem influenced by behavioral, familial, socioeconomic, and environmental factors. Although obesity-related knowledge and awareness may support healthier choices, greater awareness does not necessarily translate into healthier behaviors or weight status.
This study was designed to examine the relationships among obesity awareness, objectively assessed weight status, and lifestyle behaviors in adolescents. Particular attention was given to dietary habits, sedentary and screen-related behaviors, physical activity, sleep, and selected familial and socioeconomic characteristics. The study also explored whether obesity awareness varied according to weight status and whether family and socioeconomic factors were associated with awareness.
By evaluating obesity awareness together with measured weight status and lifestyle characteristics within the same adolescent population, the study aimed to provide a broader understanding of factors associated with adolescent overweight and obesity and to identify potentially modifiable targets for prevention.
- Conditions
- Obesity / Overweight
- Being tested
- Assessment of Obesity Awareness and Lifestyle Behaviors
- Keywords
- Adolescent Obesity, Obesity Awareness, Lifestyle Behaviors
- Medical subject headings
- Obesity, Overweight, Pediatric Obesity
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Assessment of Obesity Awareness and Lifestyle BehaviorsOther
No therapeutic intervention was administered. Participants were assessed using structured questionnaires and standardized anthropometric measurements to evaluate obesity awareness, weight status, and lifestyle-related characteristics.
| Study group | Role | What they receive |
|---|---|---|
| Adolescents | Adolescents aged 15-17 years attending participating public and private high schools in Istanbul. Participants underwent anthropometric assessment and completed questionnaires evaluating obesity awareness, lifestyle behaviors, dietary habits, screen exposure, sleep, physical activity, and sociodemographic characteristics. Receives: Other: Assessment of Obesity Awareness and Lifestyle Behaviors |
What is being measured
The primary outcome is the main question the study is designed to answer.
Prevalence of Overweight and Obesity
Prevalence of overweight and obesity among adolescents aged 15-17 years, determined using age- and sex-specific BMI-for-age criteria based on the World Health Organization growth reference for children and adolescents aged 5-19 years.
Measured: At the time of study assessment (September-November 2019)
Secondary outcomes (3)
Association Between Weight Status and Lifestyle Behaviors
Association of overweight/obesity status with television viewing, internet use, sleep duration, meal frequency, meal skipping, meal duration, ready-to-eat/fast-food consumption, physical activity, and selected familial and socioeconomic characteristics.
Measured: At the time of study assessment (September-November 2019)
Obesity Awareness According to Weight Status
Comparison of obesity-awareness scores across body mass index categories and evaluation of whether obesity awareness differs according to objectively assessed weight status.
Measured: At the time of study assessment (September-November 2019)
Factors Associated With Obesity Awareness
Assessment of associations between obesity-awareness scores and parental education, household income, family history of overweight/obesity, dietary behaviors, screen exposure, sleep duration, and other lifestyle characteristics.
Measured: At the time of study assessment (September-November 2019)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted17 Sep 2026
- Study start1 Sep 2019
- Primary completion30 Nov 2019
- Study completion30 Nov 2019
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Obesity / OverweightStudies 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
- Cohort
- Time perspective
- Cross-sectional
- Enrolment
- 751 participants (actual)
Sponsor and investigators
- Lead sponsor
- Bekir Sami Uyanık
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, Bekir Sami Uyanık, Hisar Intercontinental Hospital
- Investigators
- Bekir Sami Uyanık, MD, Professor of Clinical Bio, Study director, Hisar Hospital Intercontinental
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07826442
- Sponsor's protocol ID
- UMR-ADO-OBES-2019-01
- Status last verified
- Sep 2026
- First submitted
- 13 Sep 2026
- Last updated
- 17 Sep 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: De-identified individual participant data underlying the results reported in the publication may be made available to qualified researchers upon reasonable request to the corresponding author, subject to ethical and institutional approval.
Study at a glance
From the registry record, last updated by the sponsor on 17 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Associations Between Obesity Awareness, Weight Status, and Lifestyle Behaviors Among Adolescents: A School-Based Cross-Sectional Study
- ClinicalTrials.gov ID
- NCT07826442
- Acronym / sponsor ID
- UMR-ADO-OBES-2019-01
- Conditions
- Obesity / Overweight
- Keywords
- Adolescent Obesity, Obesity Awareness, Lifestyle Behaviors
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 751 participants (actual)
- Lead sponsor
- Bekir Sami UyanıkUniversity, hospital or other
- Study start
- 1 Sep 2019 (actual)
- Primary completion
- 30 Nov 2019 (actual)
- Study completion
- 30 Nov 2019 (actual)
- First posted
- 17 Sep 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.
This school-based cross-sectional study evaluated the relationship between obesity awareness, weight status, and lifestyle behaviors among adolescents aged 15-17 years. A total of 751 students from public and private high schools in Istanbul participated. Sociodemographic characteristics, dietary habits, physical activity, screen exposure, sleep duration, and obesity awareness were assessed using structured questionnaires, and standardized anthropometric measurements were performed. The study also examined whether obesity awareness differed according to body mass index category and whether family and socioeconomic factors were associated with obesity awareness and excess weight.
Detailed description
Adolescent obesity is a multifactorial public health problem influenced by behavioral, familial, socioeconomic, and environmental factors. Although obesity-related knowledge and awareness may support healthier choices, greater awareness does not necessarily translate into healthier behaviors or weight status.
This study was designed to examine the relationships among obesity awareness, objectively assessed weight status, and lifestyle behaviors in adolescents. Particular attention was given to dietary habits, sedentary and screen-related behaviors, physical activity, sleep, and selected familial and socioeconomic characteristics. The study also explored whether obesity awareness varied according to weight status and whether family and socioeconomic factors were associated with awareness.
By evaluating obesity awareness together with measured weight status and lifestyle characteristics within the same adolescent population, the study aimed to provide a broader understanding of factors associated with adolescent overweight and obesity and to identify potentially modifiable targets for prevention.
Study design
- Observational model
- Cohort
- Time perspective
- Cross-sectional
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Adolescents | – | Other: Assessment of Obesity Awareness and Lifestyle BehaviorsAdolescents aged 15-17 years attending participating public and private high schools in Istanbul. Participants underwent anthropometric assessment and completed questionnaires evaluating obesity awareness, lifestyle behaviors, dietary habits, screen exposure, sleep, physical activity, and sociodemographic characteristics. |
Who may qualify
- Ages
- 15 to 17 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child
- Study population
- Adolescents aged 15-17 years attending participating public and private high schools in Ümraniye, Istanbul, Türkiye. Participants were recruited using a voluntary non-probability sampling approach and included students who met the eligibility criteria and provided the required consent.
Key inclusion criteria (0 listed)
Key exclusion criteria (4 listed)
- Declined participation in the study.
- Absence of parental informed consent.
- Communication or cognitive difficulties preventing completion of the questionnaire.
- Students enrolled in 12th grade (excluded because of examination-related constraints).
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 |
|---|---|---|
| Assessment of Obesity Awareness and Lifestyle BehaviorsNo therapeutic intervention was administered. Participants were assessed using structured questionnaires and standardized anthropometric measurements to evaluate obesity awareness, weight status, and lifestyle-related characteristics. | Other | Adolescents |
Primary outcome
Prevalence of Overweight and Obesity
Time frame: At the time of study assessment (September-November 2019)
Prevalence of overweight and obesity among adolescents aged 15-17 years, determined using age- and sex-specific BMI-for-age criteria based on the World Health Organization growth reference for children and adolescents aged 5-19 years.
3 secondary outcomes
Association Between Weight Status and Lifestyle Behaviors
Time frame: At the time of study assessment (September-November 2019)
Obesity Awareness According to Weight Status
Time frame: At the time of study assessment (September-November 2019)
Factors Associated With Obesity Awareness
Time frame: At the time of study assessment (September-November 2019)
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 17 Sep 2026.
- Individual participant dataSharing planned: Yes. De-identified individual participant data underlying the results reported in the publication may be made available to qualified researchers upon reasonable request to the corresponding author, subject to ethical and institutional approval.
Related trials for Obesity / Overweight
RecruitingObservational study
Endoscopic Sleeve Gastroplasty (ESG) Prospective Trial for Obesity (EGO-Trial)
Obesity
Active, not recruitingPhase 4
Effects of Sequential Therapy With Mexidol® (Intravenous) and Mexidol® FORTE 250 (Oral) on Functional Brain Activity Assessed by Functional Magnetic Resonance Imaging and Biochemical Parameters in Patients With Chronic Cerebral Ischemia: A Comparison of Patients With and Without Metabolic Disorders
Metabolic Abnormalities, Obesity & Overweight
Recruiting
Exercise Training and Vitamin D Metabolism
Obesity & Overweight, Vitamin D
Recruiting
Metabolic Health, Bones and Nuts During Weight Loss in Adults
Weight Loss, Bone Density
Active, not recruiting
Effect of Probiotics on Insulin Sensitivity in Overweight and Obese Pregnancy
Obesity & Overweight, Gestational Diabetes Mellitus (GDM)
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.
Bekir Sami Uyanık, MD, Professor of Clinical Bio study director
Hisar Hospital Intercontinental
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 Obesity / Overweight, run by Bekir Sami Uyanık 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 0 inclusion and 4 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 17 Sep 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?
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?
Prevalence of Overweight and Obesity (time frame: At the time of study assessment (September-November 2019)). 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 17 Sep 2026.