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QUESTION: In adolescents, are varying levels of exposure to a multicomponent, school based nutrition intervention associated with varying dietary outcomes?
Design
Randomised {allocation concealed}*, unblinded, controlled trial with follow up of 1 school year.
Setting
16 schools in the metropolitan area of Minneapolis and St Paul, Minnesota, USA.
Participants
Students {mean age 12.8 y}* in middle or junior high school. Schools were eligible if they had ≥20% of students approved for the free and reduced price lunch programme and ≥30 students in each of the seventh and eighth grades. 3878 students completed the baseline survey in fall 1998, and 3503 (90%) completed the year end survey in spring 1999 (51% boys, 69% white).
Intervention
The 16 schools were pair matched; 8 schools (1748 students) were allocated to the intervention, and 8 schools (1755 students) were allocated to a control condition. Students …
Footnotes
↵* Information provided by author.
For correspondence: Dr A S Birnbaum, Division of Epidemiology, University of Minnesota, Minneapolis, MN, USA. birnbaum{at}epi.umn.edu
Source of funding: National Cancer Institute.