Brown 2017.

Methods	Type of trial: effectiveness and cost‐effectiveness Allocation: cluster‐randomised Intervention model: parallel assignment Masking: single‐blind (measurement staff)
Participants	Estimated number of schools: 16  Estimated number of participants: 2400 Inclusion criteria (schools): government‐funded, non‐fee‐paying (state), all‐ability, co‐educational secondary schools including Year 9 students in Cambridgeshire and Essex, UK Exclusion criteria (schools): − Inclusion criteria (students): all Year 9 students (13 to 14 years) in participating schools Exclusion criteria (students): none
Interventions	Intervention: GoActive is implemented using a tiered‐leadership system whereby mentors (older adolescents within the school) and peer‐leaders (within each class) encourage students to try these activities each week. Mentors remain paired with each class for the duration of the programme, whereas peer‐leaders (2 per class each week) change every week. Teachers are encouraged to use 1 tutor time weekly to do one of the chosen activities as a class; however, students gain points for trying these new activities in or out of school. Points are gained every time they try an activity; there is no expectation of time spent in the activity, as points are rewarded for the taking part itself. Individual students keep track of their own points privately on the study website, and their points are entered into the between‐class competition, so that each class competes against each other. Class rankings are circulated each week to encourage teacher support, and students receive small rewards (e.g. Frisbee, water bottle) for reaching points thresholds Comparator: no treatment or 'usual care'
Outcomes	Primary outcome: accelerometer‐assessed change in average daily MVPA Secondary outcomes: accelerometer‐assessed sedentary, light, overall physical activity during school time, weekday evenings, weekends; self‐reported physical activity, self‐efficacy, self‐esteem, peer support, friendship quality, mood, school‐reported absence and academic performance, body fat %, BMI, waist circumference; within‐trial, long‐term cost‐effectiveness and cost‐utility analyses; mixed methods process evaluation assessing programme acceptability, uptake, maintenance, and dose; putative moderators/mediators Relevant proposed outcome measures for SoF table: physical activity duration, sedentary time, BMI
Reason for awaiting classification	Marked as 'completed' in trials registry, but no publication available
Stated aim of study	Quote: "the primary aim of this study is to assess the 10‐month effectiveness of the GoActive intervention to increase average daily objectively measured MVPA among 13–14‐year‐old adolescents"
Notes