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Randomised (unclear allocation concealment), controlled, unblinded trial with follow up over 2 school years (Planet Health programme).
10 schools in 4 communities in Boston, Massachusetts, USA.
1560 students with parental consent who were in grades 6 or 7 (approximately ages 11 and 12 y) on 1 September, 1995 received Planet Health or the usual curriculum; students in special education classes were excluded. 1295 children (mean age 11.7 y, 52% boys, 69% white) (83%) were evaluated at the end of the study.
5 schools were allocated to the Planet Health programme, which consisted of teacher training workshops, classroom lessons, physical education materials, wellness sessions, and …
Sources of funding: National Institutes of Child Health and Human Development; Centers of Disease Control and Prevention.
For correspondence: Dr S Gortmaker, Planet Health, Department of Health and Social Behavior, Harvard Center for Children's Health, Harvard School of Public Health, 677 Huntington Avenue, Boston, MA 02115, USA. Fax +1 617 432 3123.