Willis 2019.

Study name	PLAN‐A
Methods	Type of trial: effectiveness Allocation: cluster‐randomised Intervention model: parallel assignment Masking: open
Participants	Estimated number of schools: 20 Estimated number of students: 1583 (actual) Inclusion criteria (schools): − Exclusion criteria (schools): − Inclusion criteria (students): Year 9 girls at participating schools Exclusion criteria (students): none
Interventions	Intervention: peer nomination, peer‐supporter training, peer diffusion of health messages Comparator: −
Outcomes	Primary outcome: accelerometer‐determined weekday physical activity Secondary outcomes: accelerometer‐determined weekend physical activity, weekend sedentary time, cost‐effectiveness Other outcomes: −
Starting date	Trial start date: 01/05/2018 Trial completion date: 21/12/2020 (anticipated)
Contact information	Responsible Party/Principal Investigator: Prof. Russ Jago
Notes