School-based obesity interventions in the metropolitan area of Rio De Janeiro, Brazil: pooled analysis from five randomised studies

School-based obesity interventions in the metropolitan area of Rio De Janeiro, Brazil: pooled analysis from five randomised studies

School-based studies, despite the large number of studies conducted, have reported inconclusive results on obesity prevention. The sample size is a major constraint in such studies by requiring large samples. This pooled analysis overcomes this problem by analysing 5926 students (mean age 11·5 years...

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Bibliographic Details
Published in:British journal of nutrition Vol. 126; no. 9; pp. 1373 - 1379
Main Authors: Rodrigues, Renata da R. M., Hassan, Bruna K., Sgambato, Michele R., Souza, Bárbara da S. N., Cunha, Diana B., Pereira, Rosangela A., Yokoo, Edna M., Sichieri, Rosely
Format: Journal Article
Language:English
Published: Cambridge, UK Cambridge University Press 14-11-2021
Subjects:
Age
Beverages
Body weight
Brazil
Child
Cooking
Dietary Surveys and Nutritional Epidemiology
Eating
Eating behavior
Exercise
Families & family life
Feasibility studies
Food
Health Promotion - methods
Humans
Intervention
Low income groups
Metropolitan areas
Obesity
Overweight
Overweight - prevention & control
Pediatric Obesity - prevention & control
Prevention
Program Evaluation
School Health Services
Schools
Students
Subgroups
Systematic review
Teenagers
Brazil
Mexico
Pooled analyses
School-based interventions
Adolescents
Randomised controlled trials
Obesity prevention
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Summary:School-based studies, despite the large number of studies conducted, have reported inconclusive results on obesity prevention. The sample size is a major constraint in such studies by requiring large samples. This pooled analysis overcomes this problem by analysing 5926 students (mean age 11·5 years) from five randomised school-based interventions. These studies focused on encouraging students to change their drinking and eating habits, and physical activities over the one school year, with monthly 1-h sessions in the classroom; culinary class aimed at developing cooking skills to increase healthy eating and attempts to family engagement. Pooled intention-to-treat analysis using linear mixed models accounted for school clusters. Control and intervention groups were balanced at baseline. The overall result was a non-significant change in BMI after one school year of positive changes in behaviours associated with obesity. Estimated mean BMI changed from 19·02 to 19·22 kg/m2 in the control group and from 19·08 to 19·32 kg/m2 in the intervention group (P value of change over time = 0·09). Subgroup analyses among those overweight or with obesity at baseline also did not show differences between intervention and control groups. The percentage of fat measured by bioimpedance indicated a small reduction in the control compared with intervention (P = 0·05). This large pooled analysis showed no effect on obesity measures, although promising results were observed about modifying behaviours associated with obesity.
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ISSN:0007-1145
1475-2662
DOI:10.1017/S0007114521000076