Brown 2013.

Methods	Study design: RCT Sampling frame: school rosters Sampling method: Rosters were blocked by site and grade and were randomly ordered within blocks for recruitment Description of the community coalition: The community‐academic partnership started in 2004 with a qualitative study of barriers to and facilitators of healthy eating among Native youth. This provided the basis for the design of the Journey to Native Youth Health intervention for healthy weight maintenance, lower fat intake, and increased physical activity. The collaborative partnership consisted of tribal health center staff, tribal health board, and council members of 2 Northern Plains Indian reservations, as well as University of Montana academic researchers. Together they prepared a grant for funding and modified an existing diabetes prevention program to make it developmentally and culturally appropriate for Native youth at high risk of diabetes. Collaboration oversaw implementation and evaluation of the program
Participants	Communities: 2 Northern Plains Indian reservations in Montana Country: USA Ages included in assessment: 10 to 14 years Reasons provided for selection of intervention community: high risk of diabetes among Native youth Intervention community (population size): 9570 Comparison community (population size): same
Interventions	Name of intervention: Journey to Native Youth Health was a youth diabetes prevention program. This 3‐month program trained tribal health representatives who offered the after‐school behavioral change program to 8 youth groups age 10 to 14 (n = 76), who were randomly assigned to the diabetes prevention intervention or to a control group that received substance abuse prevention information Theory: none stated Aim: healthy weight maintenance, lower fat intake, and greater physical activity Description of costs and resources: no program cost data provided. 2 tribal representatives received intense 2‐week training. Incentives of approximately $175 in sports clothing and equipment and cash for healthy food were provided per participant Components of the intervention: individual and family education Start date: 2010 Duration: 3 months
Outcomes	Outcomes and measures (follow‐up months): 24‐Hour dietary recall Nutrition knowledge questionnaire Accelerometers to assess physical activity Self report of physical activity BMI Date (year) of pre and post measurements: 2010/2011 to 2011/2012
Notes	Study authors describe this as a pilot study to test program feasibility and acceptability and confirm that the study duration was too short to measure change in BMI
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	School rosters were blocked by site and grade and were randomly ordered within blocks for recruitment
Allocation concealment (selection bias)	High risk	Neither participants nor implementers were blinded
Baseline outcome measurement similar	Low risk	No differences in measurements
Baseline characteristics similar	Low risk	Similar baseline characteristics reported
Blinding of outcome assessment (detection bias) All outcomes	High risk	Not blinded
Incomplete outcome data (attrition bias) All outcomes	Low risk	84% retention; similar loss to f/u in each group
Blinding of participants and personnel (performance bias) All outcomes	High risk	Neither blinded
Protection against contamination	High risk	Interventions for treatment and control were offered in each small community
Selective reporting (reporting bias)	Low risk	Primary outcomes were reported