NCT07826442

Brief 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. 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.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
751

participants targeted

Target at P75+ for all trials

Timeline
Completed

Started Sep 2019

Shorter than P25 for all trials

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

September 1, 2019

Completed
3 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

November 30, 2019

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

November 30, 2019

Completed
6.8 years until next milestone

First Submitted

Initial submission to the registry

September 13, 2026

Completed
4 days until next milestone

First Posted

Study publicly available on registry

September 17, 2026

Completed
Last Updated

September 17, 2026

Status Verified

September 1, 2026

Enrollment Period

3 months

First QC Date

September 13, 2026

Last Update Submit

September 13, 2026

Conditions

Obesity / Overweight

Keywords

Adolescent ObesityObesity AwarenessLifestyle Behaviors

Outcome Measures

Primary Outcomes (1)

  • 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.

    At the time of study assessment (September-November 2019)

Secondary Outcomes (3)

  • Association Between Weight Status and Lifestyle Behaviors

    At the time of study assessment (September-November 2019)

  • Obesity Awareness According to Weight Status

    At the time of study assessment (September-November 2019)

  • Factors Associated With Obesity Awareness

    At the time of study assessment (September-November 2019)

Study Arms (1)

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.

Other: Assessment of Obesity Awareness and Lifestyle Behaviors

Interventions

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.

Adolescents

Eligibility Criteria

Age15 Years - 17 Years
Sexall
Healthy VolunteersNo
Age GroupsChild (0-17)
Sampling MethodNon-Probability Sample
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.

You may not qualify if:

  • 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).

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Participating Public and Private High Schools in Ümraniye

Istanbul, Istanbul, 34768, Turkey (Türkiye)

Location

MeSH Terms

Conditions

ObesityOverweightPediatric Obesity

Condition Hierarchy (Ancestors)

OvernutritionNutrition DisordersNutritional and Metabolic DiseasesBody WeightSigns and SymptomsPathological Conditions, Signs and Symptoms

Study Officials

  • Bekir Sami Uyanık, MD, Professor of Clinical Bio

    Hisar Hospital Intercontinental

    STUDY DIRECTOR

Study Design

Study Type
observational
Observational Model
COHORT
Time Perspective
CROSS SECTIONAL
Sponsor Type
OTHER
Responsible Party
SPONSOR INVESTIGATOR
PI Title
Professor of Clinical Biochemistry, Director of Clinical Laboratories

Study Record Dates

First Submitted

September 13, 2026

First Posted

September 17, 2026

Study Start

September 1, 2019

Primary Completion

November 30, 2019

Study Completion

November 30, 2019

Last Updated

September 17, 2026

Record last verified: 2026-09

Data Sharing

IPD Sharing
Will share

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.

Shared Documents
STUDY PROTOCOL
Time Frame
Beginning after publication of the study results and available for 5 years.
Access Criteria
De-identified individual participant data may be made available to qualified researchers upon reasonable request to the corresponding author. Requests should include a scientifically valid research proposal and will be considered subject to applicable ethical, institutional, and data-protection requirements.

Locations

TU(1)