Nudging Students Towards Healthy Diet and Physical Activity to Prevent Obesity

Not Applicable

Withdrawn

• Conditions: Obesity
• Interventions: Behavioral: Primary prevention; Behavioral: Nudge; Behavioral: Primary prevention + nudge

• Registration Number: NCT03128775
• Lead Sponsor: Rio de Janeiro State University

Brief Summary

The objective of the present study is to estimate the effect of nudging proposals on the students' Body Mass Index, based on changes made in the school environment. This is a factorial randomized community trial, which will be conducted in 18 public schools in the city of Duque de Caxias, RJ.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2016-10-04
• Study First Submitted QC: 2017-04-24
• Study First Posted: 2017-04-25
• Status Verified: 2025-04
• Last Update Submitted: 2025-04-02
• Last Update Posted: 2025-04-06
• Study Start: 2025-07
• Primary Completion: 2026-07
• Study Completion: 2026-12

Recruitment & Eligibility

• Status: WITHDRAWN
• Sex: All
• Target Recruitment: 1300

Inclusion Criteria

5th and 6th grades students consent form signed by parents/tutors

Exclusion Criteria

pregnant girls

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Primary prevention	Primary prevention	This group will receive educational activities in the classroom. Classroom-based educational activities will be based on an earlier study, called PAPPAS, which was developed in the same city and constituted a school-based intervention with the objective of reducing the consumption of sweetened beverages and biscuits and increase the consumption of fruits, vegetables and beans.
Nudge	Nudge	This group will receive changes in the school environment (nudge strategies). Interventions regarding food consumption were based on nudge strategies to led students to eat more fruits and vegetables. To stimulate physical activity, several sports equipment (basketball hoops, volleyball nets, balls, ropes, shuttlecock and a lot of toys) are available for use in the school sports court.
Primary prevention + nudge	Primary prevention + nudge	This group will receive educational activities and in the classroomchanges in the school environment (nudge).

Primary Outcome Measures

Name	Time	Method
Body mass Index (BMI)	1 year	The body weight will be measured by a portable electronic scale with a segmental body composition monitor (Tanita BC-558). The height will be measure by a portable stadiometer (brand: "AlturaExata"). BMI will be calculated as weight/stature\*stature.

Secondary Outcome Measures

Name	Time	Method
body fat percentage	1 year	Body fat percentage will be measured by a portable electronic scale with a segmental body composition monitor (Tanita BC-558).

Trial Locations

Locations (1)

18 Schools of Metropolitan Area; 🇧🇷 Duque de Caxias, Rio de Janeiro, Brazil