Ecological system theory and community participation to promote healthy food environments for obesity and non-communicable diseases prevention among school-age children.

Objectives: To implement and evaluate the effectiveness of the community participatory program between school and family based on ecological system theory and participatory action research. The intervention covers three levels at the individual, family and school levels and involves educating students and parents by using technology, reducing sedentary behaviours, increasing exercise and changing to healthy food environments at school and at home.

Design: A quasi-experimental design was used in this study.