Wen 2008.

Methods	Design: Cluster‐randomised controlled trial Duration of follow‐up: 19 months
Participants	Country: Australia Setting: Urban primary schools Intervention group: 12 schools, 1094 baseline responses Control group: 12 schools, 1164 baseline responses Age: 10‐11 years. Gender: 52% female. 54% lived within 1 km of school. 45% had >1 car in household.
Interventions	For students: survey, home to school mapping exercise, preparation for high school For teachers: professional development, classroom learning materials, travel access guide for each school, launch of this guide at school Parents: parent survey, monthly newsletters, parent & citizen association meetings Council: review of safety and walkability near participating schools, working with councils to improve safety and walkability near these schools Duration of intervention: 19 months
Outcomes	Student‐reported travel mode each day for five days; parent‐reported usual travel mode to and from school. Effects on inequalities not reported. Adverse effects not reported.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	Low risk	Pulled out of a hat, alternating assignment
Allocation concealment?	Low risk	Pulled out of a hat, alternating assignment
Blinding? All outcomes	High risk	Not feasible. Could have influenced outcomes
Incomplete outcome data addressed? All outcomes	Low risk	Loss to follow‐up 35%, but those lost to follow‐up similar to other participants with respect to demographics, distance to school, baseline travel mode
Free of selective reporting?	Unclear risk	Not clear that all pre‐specified outcomes were included
Free of other bias?	Low risk	No other sources of bias identified
Adequate matching of intervention / control groups?	High risk	Despite randomisation, higher proportion of children lived <1km from intervention schools