Clin Exp Pediatr > Accepted Articles
DOI: https://doi.org/10.3345/cep.2021.00409    [Accepted]
Published online November 23, 2021.
Effectiveness of obesity interventions among South Korean children and adolescents and importance of the type of intervention component: a meta-analysis
Siyoung Choe1  , Jaesin Sa2  , Jean-Philippe Chaput3  , Deokjin Kim4 
1Miami University, Oxford, United States
2Touro University, Vallejo, United States
3University of Ottawa, Ottawa, Canada
4Namseoul University, Cheonan, Korea
Correspondence: 
Deokjin Kim, Email: kdj275@nsu.ac.kr
Received: 7 April 2021   • Revised: 13 October 2021   • Accepted: 14 October 2021
Abstract
Background
Various interventions have been tested to prevent or treat childhood obesity in South Korea. However, the overall effect of those interventions is unclear, as very few reviews and meta-analyses were specific to Korean children and adolescents.
Purpose
We aimed to examine the overall effect of obesity interventions among Korean children and adolescents, while also examining differences by gender, age group, baseline weight category, intervention duration, number of intervention components, and type of intervention components.
Methods
A meta-analysis was conducted for all intervention studies sampling Korean children and adolescents, with at least one control group and one month of follow-up, published between January 2000 and August 2020. Cohen’s d was calculated as an effect size for treatment effect, using the standardized difference between intervention group’s BMI change and control group’s BMI change.
Results
The final sample included 19 intervention studies with 2,140 Korean children (mean age = 12.2 years). Overall, interventions were strongly favored over their controls (d=1.61, 95% CI = 1.12-2.09). The subgroup analysis showed that interventions with at least one physical activity component (d = 2.43, 95% CI = 1.63-3.24) were significantly better than those that did not include physical activity (d = 0.02, 95% CI = -0.26-0.31).
Conclusion
Type of intervention component appeared important, though no differential association was observed by gender, age, baseline weight category, intervention duration, and number of intervention components. Korean and non-Korean interventions may be substantively different. Additional studies are needed to understand why and how Korean interventions differ from non-Korean interventions.
Key Words: Weight management interventions, Body mass index, Korean children and adolescents


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