Childhood Obesity Intervention Study
Condition: Pediatric Obesity
MeSH terms: Obesity; Pediatric Obesity
Study type: Interventional

Summary: 
      Globally, childhood overweight and obesity is a public health problem. Although the rising
      trend in children's body mass index (BMI) has plateaued in some high-income countries, it has
      accelerated in low- and middle-income countries. It is especially true amongst Chinese
      children with the annual increase rate of obesity during 2010-2014 greater than any other
      periods from 1985 to 2010.

      With the dramatic economic development in China, children are now growing up in an
      increasingly 'obesogenic' environment. For example, the availability and ubiquity of
      computers and smart phones promote sedentary time, and access to energy dense food and sugar
      sweetened beverages is now widespread. Effective childhood obesity intervention is urgently
      needed in China. Although over 20 intervention studies for overweight/obesity among children
      and adolescents have been conducted in China since the 1990s, most of them had moderate or
      serious methodological weaknesses. For example, they did not report the number of students,
      schools or districts initially approached to participate, raising the possibility of
      selection and recruitment bias. Additionally, although they stated the allocation of
      intervention and control were randomized, no description of the method of randomization was
      reported.

      Given the relative lack of high-quality interventions for childhood overweight/obesity, the
      investigators designed a cluster randomized controlled trial to assess the effectiveness of a
      multicomponent one-academic-year intervention among 24 primary schools (approximately 1200
      students) in the eastern (Beijing), middle (Shanxi) and western (Xinjiang) part of China.

      The study aims to identify: 1) whether the school-based intervention will be effective for
      preventing excessive weight gain among children; 2) whether the intervention will be
      beneficial for improving healthy eating, physical activity and reducing sedentary behaviors
      among children.
    


Intervention name(s): a multicomponent intervention
Intervention type(s): Behavioral
Intervention description(s): School-level policies Students will not be allowed to drink sugar-sweetened beverage or eat unhealthy snacks in schools and drinking water will be advocated.
Monitoring of students' weight and height Students will be monitored their weight and height monthly.
Promotion of physical activity Students will be required to perform at least 60 minutes of moderate to vigorous physical activity each day in school and increase their physical activity outside school (reaching 30 minutes per weekday and one hour per weekend day).
Health education activities Health education activities will be provided for students (10 sessions, 40 minutes per session, 2-3 weeks once), parents and school teachers.
The mobile application The mobile application will disseminate health education knowledge among students, parents and teachers, monitor and provide feedback of students' BMI status and diet and physical activity behaviors.
Allocation: Randomized
Intervention model: Parallel Assignment
Masking: Single (Outcomes Assessor)
Primary purpose: Prevention