Development and Evaluation of a Web-based Parental Role Modeling Program for Childhood Obesity Management

NCT07641452 | Completed

• 1 other identifier: 17/C/A-IRB
• Study Type: interventional
• Target: 60
• Locations: 1 country
• Sites: 1

Brief Summary

The goal of this clinical trial is to learn whether an online family health education program can help Vietnamese children aged 7-9 years with overweight or obesity develop healthier habits. The main questions it aims to answer are:

1. 1.Does the program improve parents' confidence, role modeling behaviors, family communication, and healthy family practices?
2. 2.Does the program improve children's eating habits, physical activity, screen time, and body measurements related to overweight and obesity?
3. 3.Complete surveys about their family's health habits and daily routines.
4. 4.Attend health checkups that include measurements of height, weight, and waist size.
5. 5.Receive either the online family health education program or standard health education materials.
6. 6.Complete follow-up assessments after the program and four months later.

Conditions

Childhood Obesity; Overweight and Obese Children; Pediatric Obesity; Overweight and Obesity in Schoolchildren

Keywords

childhood obesity; family-centered intervention; self-efficacy; role modeling; mixed-methods; parent-mediated intervention; Vietnam

Outcome Measures

Primary Outcomes (2)

• Child Body Mass Index-for-Age z-Score (BMI-for-Age z-Score)

  Child body mass index-for-age z-score will be calculated using the World Health Organization (WHO) growth reference for children aged 5-19 years. Body mass index (BMI) will first be calculated as body weight in kilograms divided by height in meters squared (kg/m²), and BMI values will then be converted to age- and sex-specific BMI-for-age z-scores using WHO reference standards. BMI-for-age z-scores are continuous measures with no fixed upper or lower limit. According to WHO criteria, children are classified as normal weight (\< +1 SD), overweight (≥ +1 SD), and obese (≥ +2 SD). Lower BMI-for-age z-scores indicate lower relative weight status, whereas higher BMI-for-age z-scores indicate greater relative weight status.

  Baseline, post-intervention (8 weeks), 1-month follow-up, and 3-month follow-up

• Child Waist Circumference (cm)

  Child waist circumference will be assessed in centimeters using a non-elastic measuring tape. Measurements will be taken at the midpoint between the lowest rib and the iliac crest, with the child standing and measured at the end of normal expiration. Values will be recorded to the nearest 0.1 cm following standardized anthropometric measurement procedures. Waist circumference is a continuous measure with no fixed upper or lower limit. Lower waist circumference values indicate lower central adiposity, whereas higher values indicate greater central adiposity.

  Baseline, post-intervention (8 weeks), 1-month follow-up, and 3-month follow-up

Secondary Outcomes (8)

• Brief Parental Self-Efficacy Scale (BPSES) Total Score

  Baseline, post-intervention (8 weeks), 1-month follow-up, and 3-month follow-up

• Parental Role Modeling of Physical Activity Scale Total Score

  Baseline, post-intervention (8 weeks), 1-month follow-up, and 3-month follow-up

• Parental Modeling of Eating Behavior Scale (PARM) Total Score

  Baseline, post-intervention (8 weeks), 1-month follow-up, and 3-month follow-up

• Revised Family Communication Pattern Instrument (RFCP) Total Score

  Baseline, post-intervention (8 weeks), 1-month follow-up, and 3-month follow-up

• Parental Stress Scale (PSS) Total Score

  Baseline, post-intervention (8 weeks), 1-month follow-up, and 3-month follow-up

Other Outcomes (3)

• Percentage of Participants Completing All Study Assessments

  Throughout the study period (Baseline to 3-month follow-up)

• Percentage of Assigned Program Activities Completed

  During the 8-week intervention period

• Percentage of Participants Completing at Least 75% of Program Modules

  During the 8-week intervention period

Study Arms (2)

Web-Based Parental Role Modeling Program

EXPERIMENTAL

Parents in this group received the web-based parental role modeling program in addition to usual school health information. The program was delivered through a Learning Management System and was designed to help parents support healthy eating, physical activity, reduced screen time, and healthy family routines for children with overweight or obesity.

Behavioral: Web-based parental role modeling program

Standard Health Education Materials

ACTIVE COMPARATOR

Parents in this group received standard printed health education materials about healthy eating, physical activity, screen-time reduction, and healthy lifestyle practices for children with overweight or obesity. They did not receive access to the web-based program during the study period.

Behavioral: Standard health education materials

Interventions

Standard health education materials BEHAVIORAL

Printed health education materials covering healthy nutrition, physical activity, reduced screen time, and healthy family lifestyle practices.

Also known as: Printed health education materials

Standard Health Education Materials

Web-based parental role modeling program BEHAVIORAL

A culturally adapted online family health education program delivered through a Learning Management System. The program included six modules delivered over 8 weeks, with videos, presentations, quizzes, practical family activities, downloadable materials, self-monitoring tasks, reminders, and support through LMS and Zalo. Booster support was provided during the follow-up period.

Also known as: Parent-mediated intervention program

Web-Based Parental Role Modeling Program

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Parents of children aged 7-9 years with a BMI-for-age z-score ≥ +1 standard deviation (SD) according to the World Health Organization growth reference.
• Willingness to participate in a web-based program, including attending online workshops and completing behavioral tasks and assessment.
• Availability of the internet and digital devices necessary to engage in the web-based program.
• Parents who were responsible for the child's daily health-related routines, including meals, physical activity, and screen-time management.

You may not qualify if:

• Children with chronic medical conditions, physical disabilities, or developmental disorders that significantly affect dietary or physical activity behaviors or growth.
• Parents who are unable to commit to the study timeline or program schedule.
• Families already participating in another obesity-related program.

Sponsors & Collaborators

• Do Thi Thu Huyen: lead
• Hai Phong Medical University: collaborator

Study Sites (1)

Hai Phong Medical University

Haiphong, Hai Phong, 180000, Vietnam

Location

MeSH Terms

Conditions

Pediatric Obesity; Overweight

Condition Hierarchy (Ancestors)

Obesity; Overnutrition; Nutrition Disorders; Nutritional and Metabolic Diseases; Body Weight; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Study Officials

• Moonkyoung Park, PhD

  College of Nursing, Chungnam National University

  STUDY CHAIR

• Do Thi Thu Huyen, MSN

  College of Nursing, Chungnam National University

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NON RANDOMIZED
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR INVESTIGATOR
• PI Title: Principal investigator

Model Details: This study used a non-randomized parallel-group design. Participants were allocated to either an intervention group receiving a web-based parental role modeling program or a comparison group receiving standard health education materials. Outcomes were assessed at baseline, immediately after the 8-week intervention, 1 month after intervention, and 3 months after intervention.

Study Record Dates

• First Submitted: June 2, 2026
• First Posted: June 11, 2026
• Study Start: August 5, 2025
• Primary Completion: February 1, 2026
• Study Completion: February 18, 2026
• Last Updated: June 12, 2026

Record last verified: 2026-06

Data Sharing

• IPD Sharing: Will share
• Shared Documents: STUDY PROTOCOL, SAP, ICF, ANALYTIC CODE
• Time Frame: Beginning 6 months after publication of the primary study results and continuing for up to 5 years following publication.
• Access Criteria: De-identified individual participant data, study protocol, statistical analysis plan, informed consent form, and analytic code will be available to qualified researchers who submit a methodologically sound research proposal. Requests will be reviewed by the study investigators and approved if consistent with the study objectives, ethical requirements, and participant confidentiality protections. Approved researchers will receive access to the requested materials through secure electronic transfer.

Locations

VN (1)