Background: Childhood obesity considers a global health problem; 100 million health
initiative was launched for early detection of non-communicable diseases such as obesity. Aim: This
study aimed to evaluate the effect of evidence based obesity prevention program among primary
school students according to 100 million health initiative. Research design: A quasi experimental
design was carried in this study. Setting: This study was conducted at seven Governmental Primary
Schools in Benha City. Schools selected randomly one from each sector from total 108 schools that
distributed into 7 sectors. Sample: Systematic random sample was used to select 180 primary schools
students. Tools of data collection: Three tools were used. I: A structured interview questionnaire
which included demographic characteristics of the primary school students, family and medical
history, knowledge regarding obesity and 100 million health initiative. II: Practices of primary school
students regarding prevention of obesity. III: Attitude scale regarding prevention of obesity. Results:
10.0% of primary school students had good knowledge regarding obesity and 100 million health
initiative pre-implementation of program which improved to 75.0% post- implementation of program,
9.4% of them had satisfactory practices regarding prevention of obesity pre-implementation of
program which improved to 72.8% post-implementation of program and 27.8% of them had positive
attitude regarding prevention of obesity pre-implementation of program which improved to 82.2%
post-implementation of program.