TTM-Based Intervention for Weight Management Among High School Female Students

To examine the efficacy of a Transtheoretical Model (TTM)-based intervention in improving weight management behaviors.

1. To identify if the student age, body mass index (BMI) and socioeconomic status can predict WMB. 2. To investigate the difference in students' WMB between groups of grade, liven arrangement, socioeconomic class, and BMI.

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Key information

Conditions

Weight Management

Age range

15 year–19 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

About this study

This randomized controlled trial aims to evaluate the efficacy of a Transtheoretical Model (TTM)-based behavioral intervention in improving weight management behaviors among high school female students. The intervention is designed to guide participants through the stages of behavior change, enhancing their readiness to adopt and maintain healthy lifestyle practices such as balanced nutrition, physical activity, and weight control behaviors. The study will compare outcomes between an intervention group receiving structured TTM-based sessions and a control group receiving standard health education. Primary outcomes will focus on changes in weight management behaviors, while secondary outcomes may include changes in stage of readiness for change, self-efficacy, and health-related attitudes. The findings are expected to provide evidence on the effectiveness of stage-based behavioral interventions in promoting healthy weight management among adolescent females.

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

Female high school students
Age 15-19 years
Overweight or obese according to Body Mass Index (BMI) criteria
Enrolled in high school morning classes
Willing to participate in the study and provide informed consent

Exclusion criteria

Students below high school level (e.g., middle school students)
Students with physical disabilities that prevent participation in physical activity
Students with chronic medical conditions affecting body weight or study participation

Treatment and study plan

Transtheoretical Model (TTM)-Based Behavioral Intervention for Weight Management

Behavioral

This is a non-pharmacological, behavioral intervention designed to improve weight management behaviors among high school female students. It is based on the Transtheoretical Model of behavior change and consists of structured, stage-matched educational and counseling sessions. The intervention includes guidance on healthy dietary practices, promotion of regular physical activity, goal setting, self-monitoring techniques, and motivational strategies tailored to each participant's readiness to change.

Primary outcomes

Change in Weight Management Behavior Scores Measured by TTM-Based Questionnaires

Time frame: 6 months

Change in Weight Management Behavior Scores Measured by TTM-Based Questionnaires:

Weight Control Decisional Balance Scale (WCDBS): 20-item scale with scores ranging from -40 to +40. Higher positive scores indicate more favorable attitudes toward healthy weight management behaviors.

Weight Control Processes of Change Scale (WCPOCS): 48-item scale with scores ranging from 48 to 240. Higher scores indicate greater engagement in healthy weight management behavior change processes.

Stages of Change for Weight Control Scale (SCWCS): categorizes participants into precontemplation, contemplation, preparation, action, and maintenance stages. Higher stages indicate greater readiness for healthy weight management behavior change.

The outcome will be reported as mean score changes and stage distribution differences between intervention and control groups.

Study contacts

Contact information is provided by the study sponsor or research team.

Doaa Kadhim Sabbar Sabbar, PhD

CONTACT

[email protected]

+9467804600745

Sponsors and collaborators

Lead sponsor

University of Baghdad

Other

Registry information

Official study title

Efficacy of the Transtheoretical Model of Change-Based Intervention on Weight Management Behavior Among High School Female Students: A Randomized Controlled Trial

Acronym: TTM-WMHSFS-RCT

Important dates

Study start: 2026
Primary completion: 2027
Study completion: 2027
First posted: May 22, 2026
Registry last updated: May 22, 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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