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Meta-Analysis
. 2021 Jul;24(10):3087-3099.
doi: 10.1017/S1368980021001117. Epub 2021 Mar 22.

School-based interventions for the treatment of childhood obesity: a systematic review, meta-analysis and meta-regression of cluster randomised controlled trials

Tarcisus Jian Hui Ho  1 , Ling Jie Cheng  2 , Ying Lau  3
Affiliations
Meta-Analysis

School-based interventions for the treatment of childhood obesity: a systematic review, meta-analysis and meta-regression of cluster randomised controlled trials

Tarcisus Jian Hui Ho et al. Public Health Nutr. 2021 Jul.

Abstract

Objective: Schools offer an ideal setting for childhood obesity interventions due to their access to children and adolescents. This review aimed to systematically review the impact of school-based intervention for the treatment of childhood obesity.

Design: Eight databases were searched from inception till 30 May 2020. A revised Cochrane risk-of-bias tool and the Grading of Recommendations, Assessment, Development and Evaluations criteria were used to evaluate the risk of bias and overall evidence. Meta-analysis and meta-regression were performed on Stata software using the random effects model. Overall effect was evaluated using Hedges' g, and heterogeneity was assessed using Cochran's Q and I2.

Setting: Cluster randomised controlled trials (cluster-RCT) delivered in school.

Participants: Children and adolescents (6-18 years of age) with overweight and obesity.

Results: Twelve cluster-RCT from seven countries with 1755 participants were included in the meta-analysis. School-based interventions for the treatment of childhood obesity reduced BMI and BMI z-scores with a medium effect (g = 0·52). Subgroup analyses showed greater effectiveness of brief school-based interventions and the interventions conducted in lower-middle to upper-middle economies. Meta-regression assessed the heterogeneity and the final model, with covariates of the type of economies and trial duration, accounted for 41·2 % of the variability. The overall quality of evidence was rated low because of the high risk of bias and inconsistency.

Conclusions: School-based interventions are a possible approach to provide universal healthcare for the treatment of childhood obesity, and further well-designed cluster-RCT with longer follow-up are needed. This study is registered with PROSPERO (CRD42020160735).

Keywords: Adolescent; Children; Obesity; School-based.

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Figures

Fig. 1
Fig. 1
Selection of trials for inclusion in the systematic and meta-analysis
Fig. 2
Fig. 2
Risk of bias summary. formula image, Low risk; formula image, some concerns; formula image, high risk
Fig. 3
Fig. 3
Forest plot of effect size change in BMI outcomes for school-based interventions and control groups
See this image and copyright information in PMC

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