The Impact of an Intervention Taught by Trained Teachers on Childhood BMI z Score
The purpose of this study is to assess the effects of a six months nutrition intervention, delivered and taught by classroom teachers with in-service nutrition training, on the prevention of overweight and obesity among children in grades 1 to 4.
In this randomized controlled trial, 464 children from seven elementary schools were allocated to a six months nutrition educational intervention by their own teachers or to standard care. Intervened teachers had 12 sessions of three hours each with the researchers throughout six months, according to the following topics: nutrition and healthy eating (sessions 1 to 4); the importance of drinking water (session 5); strategies to encourage fruits and vegetables consumption and to decrease high energy-density foods intake (sessions 6 to 8); strategies to increase physical activity (sessions 9 and 10); and healthy cooking activities (sessions 11 and 12). After each session, teachers were encouraged to develop activities in class that focused on the learned topics. Sociodemographic, anthropometric, dietary, and physical activity assessments were performed at baseline and the end of intervention.
We expect that fewer intervened children become overweight and the consumption of fruit and vegetables will be higher. In addition, we expect a less consumption of low-nutrition high dense foods.
We also expect to provide further support to decrease overweight epidemic, involving classroom teachers in a training intervention and making them dedicated interventionists.
|Evidence of an Intervention on Childhood BMI z Score||Other: Training teachers on healthier lifestyles|
|Study Design:||Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: Double Blind (Participant, Outcomes Assessor)
Primary Purpose: Prevention
- BMI z score [ Time Frame: the first 3 months after the intervention ]
- dietary intake [ Time Frame: within the first 3 months after the intervention ]
|Study Start Date:||September 2007|
|Study Completion Date:||June 2009|
|Primary Completion Date:||June 2008 (Final data collection date for primary outcome measure)|
|Experimental: Lifestyle counseling||
Other: Training teachers on healthier lifestyles
During 2007/2008 seven out of eighty public elementary public schools from Guimarães (Portugal) were invited to participate in this study. The number of schools involved was according to constraints of personnel for the assessment and intervention. Schools were the unit of randomization and three were assigned into intervention, and four into control group. Data was collected prior to intervention and immediately after, during the year 2009 (post-intervention). Prior to participation on data collection, parents provided informed consent, and children provided oral assent.
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Please refer to this study by its ClinicalTrials.gov identifier: NCT01397123
|Santos Simões group of schools|
|Guimarães, Braga, Portugal, 4810|
|Study Director:||Pedro Moreira, PhD||Universidade do Porto|
|Study Director:||Beatriz Pereira, PhD||University of Minho|
|Principal Investigator:||Rafaela V Rosario||University of Minho|