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Completed

NCT Number: NCT07826442

Obesity Awareness, Weight Status, and Lifestyle Behaviors Among Adolescents

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.

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Key information

Conditions

Obesity / Overweight Body Weight Nutrition Disorders Nutritional and Metabolic Diseases Obesity Overnutrition Overweight Pathological Conditions, Signs and Symptoms Pediatric Obesity Signs and Symptoms

Age range

15 year–17 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Participating Public and Private High Schools in Ümraniye

Istanbul, 34768, Turkey (Türkiye)

About this study

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.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

nclusion Criteria

Adolescents aged 15-17 years.

Enrollment in one of the participating public or private high schools in Ümraniye, Istanbul, Türkiye.

Willingness to participate in the study.

Written informed consent from a parent or legal guardian and assent/consent from the adolescent before participation.

Exclusion criteria

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).

Treatment and study plan

Assessment of Obesity Awareness and Lifestyle Behaviors

Other

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.

Primary outcomes

  1. 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.

Secondary outcomes

  1. Association Between Weight Status and Lifestyle Behaviors

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

    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.

  2. Obesity Awareness According to Weight Status

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

    Comparison of obesity-awareness scores across body mass index categories and evaluation of whether obesity awareness differs according to objectively assessed weight status.

  3. Factors Associated With Obesity Awareness

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

    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.

Sponsors and collaborators

Lead sponsor

Bekir Sami Uyanık

Other

Registry information

Official study title

Associations Between Obesity Awareness, Weight Status, and Lifestyle Behaviors Among Adolescents: A School-Based Cross-Sectional Study

Important dates

Study start
2019
Primary completion
2019
Study completion
2019
First posted
Sep 17, 2026
Registry last updated
Sep 17, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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