Efficacy of a Stage-Matched Intervention Based on The Transtheoretical Model of Change in Dietary Fat Reduction

Study Overview
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Brief Summary
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This study aims to examine the efficacy of a Stage-Matched Intervention based on The Transtheoretical Model of Change in dietary fat reduction among female high school students.

Detailed Description
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This study aims to examine the efficacy of a Stage-Matched Intervention based on The Transtheoretical Model of Change in dietary fat reduction among female high school students. The study intervention will be designed based on each Stage of Change of the Transtheoretical Model of Change in that participants in each Stage of Change will receive the intervention that matches the Stage of Change they would be in. A 12-week interval would be considered between administering the intervention and posttest 1 and the same interval would be used between posttest 1 and posttest 2.

Official Title
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Efficacy of a Stage-Matched Intervention Based on The Transtheoretical Model of Change in Dietary Fat Reduction Among Female High School Students: A Randomized Controlled Trial

Conditions
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Dietary Fat Reduction

Intervention / Treatment
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* Behavioral: Stage-matched interventions


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: High school male students who do not experience any psychiatric-mental disorder. Exclusion Criteria: High school male students who experience any psychiatric-mental disorder.

Ages Eligible for Study
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Minimum Age: 15 Years
Maximum Age: 20 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Sequential Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Precontemplation, Contemplation, Preparation, Action, and Maintenance-based intervention<br>The intervention that would consider the Processes of Change that people use when they would be in the Precontemplation Stage of Change. | Behavioral: Stage-matched interventions<br>* The study intervention will be designed based on each Stage of Change of the Transtheoretical Model of Change in that participants in each Stage of Change will receive the intervention that matches the Stage of Change they would be in. A 12-week interval would be considered between administering the intervention and posttest 1 and the same interval would be used between posttest 1 and posttest 2.<br>|
| Experimental: Contemplation-based intervention<br>The intervention that would consider the Processes of Change that people use when they would be in the Contemplation Stage of Change. | Behavioral: Stage-matched interventions<br>* The study intervention will be designed based on each Stage of Change of the Transtheoretical Model of Change in that participants in each Stage of Change will receive the intervention that matches the Stage of Change they would be in. A 12-week interval would be considered between administering the intervention and posttest 1 and the same interval would be used between posttest 1 and posttest 2.<br>|
| Experimental: Preparation-based intervention<br>The intervention that would consider the Processes of Change that people use when they would be in the Preparation Stage of Change. | Behavioral: Stage-matched interventions<br>* The study intervention will be designed based on each Stage of Change of the Transtheoretical Model of Change in that participants in each Stage of Change will receive the intervention that matches the Stage of Change they would be in. A 12-week interval would be considered between administering the intervention and posttest 1 and the same interval would be used between posttest 1 and posttest 2.<br>|
| Experimental: Action-based intervention<br>The intervention that would consider the Processes of Change that people use when they would be in the Action Stage of Change. | Behavioral: Stage-matched interventions<br>* The study intervention will be designed based on each Stage of Change of the Transtheoretical Model of Change in that participants in each Stage of Change will receive the intervention that matches the Stage of Change they would be in. A 12-week interval would be considered between administering the intervention and posttest 1 and the same interval would be used between posttest 1 and posttest 2.<br>|
| Experimental: Maintenance-based intervention<br>The intervention that would consider the Processes of Change that people use when they would be in the Maintenance Stage of Change. | Behavioral: Stage-matched interventions<br>* The study intervention will be designed based on each Stage of Change of the Transtheoretical Model of Change in that participants in each Stage of Change will receive the intervention that matches the Stage of Change they would be in. A 12-week interval would be considered between administering the intervention and posttest 1 and the same interval would be used between posttest 1 and posttest 2.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Stages of Change Scale for Dietary Fat Reduction | Stages of Change Scale for Dietary Fat Reduction measures individuals' readiness to reduce dietary fat. | 6 months |