Reducing the incidence of overweight and obesity by a healthy lifestyle intervention program for schoolchildren in Hanoi, Vietnam: a randomized controlled trial | BMC Public Health
Study design A randomized controlled trial was designed through the application of a random cluster sampling method. The research was carried out in metropolitan districts of Hanoi, Vietnam. Among the four metropolitan districts, two districts were randomly selected. Four schools were selected among 29 public secondary schools in two districts. In each school, five grade…