A Multi-component Intervention on Improving Fruit and Vegetable Consumption in Teenagers and Their Mothers

Study Overview
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Brief Summary
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This study is a longitudinal controlled trial that is designed to investigate the effectiveness of a multi-component intervention on improving fruit and vegetable consumption in teenagers and their mothers.

Detailed Description
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This study is a longitudinal controlled trial that is designed to investigate the effectiveness of a multi-component intervention on improving fruit and vegetable consumption in teenagers and their mothers. Participants will be allocated in three groups with a) an intervention group in which mothers and children receive the intervention and questionnaires, b) only the children receive the intervention and mothers and children receive the questionnaires, and c) mothers and children are in active control group and only receive the questionnaires. The intervention package contains behavior change techniques targeting outcome expectancy, self-efficacy, action planning, coping planning, and self-monitoring. The active control group receives an information sheet regarding recommendations on fruit and vegetable intake. There will be 3 assessment points in time, with 1 months in between. All the intervention materials and information sheets will be handed to participants after the baseline assessment. The self-monitoring calendar will be collected at time 2 assessment. The primary outcome of this study is to estimate the dyadic mechanisms between mothers and their children regarding improving fruit and vegetable intake. Secondary outcome is to investigate whether fruit and vegetable consumption did improve in the intervention groups in general and also to find the psychological mechanism behind the changes during the time of the study.

Official Title
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A Multi-component Intervention on Improving Fruit and Vegetable Consumption in Teenagers and Their Mothers

Conditions
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Nutrition

Intervention / Treatment
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* Behavioral: behavioral
* Behavioral: behavioral
* Behavioral: primary eduction


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: They are not involved in the nutritional education Ability to understand Persian language Adolescents attending high schools in Qazvin Exclusion Criteria: Does not meet inclusion criteria
Sexes Eligible for Study
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All

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: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: active control<br>mothers and children are in active control group and only receive the questionnaires | Behavioral: primary eduction<br>* The intervention package contains behavior change techniques targeting outcome expectancy, self-efficacy, action planning, coping planning, and self-monitoring. The active control group receives an information sheet regarding recommendations on fruit and vegetable intake. There will be 3 assessment points in time, with 1 1 month and six months in between. All the intervention materials and information sheets will be handed to participants after the baseline assessment. The self-monitoring calendar will be collected at time 2 assessment.<br>|
| Experimental: mother and student<br>an intervention group in which mothers and children receive the intervention and questionnaires | Behavioral: behavioral<br>* The intervention package contains behavior change techniques targeting outcome expectancy, self-efficacy, action planning, coping planning, and self-monitoring. The active control group receives an information sheet regarding recommendations on fruit and vegetable intake. There will be 3 assessment points in time, with 1 month and six months in between. All the intervention materials and information sheets will be handed to participants after the baseline assessment. The self-monitoring calendar will be collected at time 2 assessment.<br>|
| Experimental: children<br>only the children receive the intervention and mothers and children receive the questionnaires | Behavioral: behavioral<br>* The intervention package contains behavior change techniques targeting outcome expectancy, self-efficacy, action planning, coping planning, and self-monitoring. The active control group receives an information sheet regarding recommendations on fruit and vegetable intake. There will be 3 assessment points in time, with 1 month and six months in between. All the intervention materials and information sheets will be handed to participants after the baseline assessment. The self-monitoring calendar will be collected at time 2 assessment.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| changes in fruit intake using a self-reported questionnaire | using a self-reported questionnaire | baseline, 1 Months, 6 months follow-up | 
| changes in vegetable intake using a self-reported questionnaire | using a self-reported questionnaire | baseline, 1 Months, 6 months follow-up | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| changes in self efficacy using a self-reported questionnaire | using a self-reported questionnaire | baseline, 1 Months, 6 months follow-up | 
| changes in outcome expectancy using a self-reported questionnaire | using a self-reported questionnaire | baseline, 1 Months, 6 months follow-up | 
| changes in coping planning using a self-reported questionnaire | using a self-reported questionnaire | baseline, 1 Months, 6 months follow-up | 
| changes in action planning using a self-reported questionnaire | using a self-reported questionnaire | baseline, 1 Months, 6 months follow-up | 
| changes in self-monitoring using a self-reported questionnaire | using a self-reported questionnaire | baseline, 1 Months, 6 months follow-up |