Rowland 2003.

Methods	Design: Cluster‐randomised controlled trial Duration of follow‐up: 14 months
Participants	Country: United Kingdom Setting: Urban primary schools Intervention group n=714 Control group n=672 Age: year 2 & 5 primary schoolchildren. 56% female (intervention group), 49% female (control group).
Interventions	16 hours of expert assistance from school travel co‐ordinators over one year. School travel co‐ordinators provide advice on road safety and travel plan development, and facilitate travel plan implementation. Duration of intervention: 14 months
Outcomes	Travel mode: mode of travel to school on the day of the survey Effects on inequalities not reported. Adverse effects not reported.
Notes	2 of 11 intervention schools opted out of the project following randomisation. Analysis adjusted for baseline travel.
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	Low risk	Randomisation by software programme
Allocation concealment?	Low risk	Randomisation by independent statistician
Blinding? All outcomes	High risk	Not feasible. Could have influenced outcome.
Incomplete outcome data addressed? All outcomes	Low risk	95% of schools completed follow‐up survey, and 85% of children in those schools completed the survey. Thus, loss to follow‐up relatively small.
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?	Low risk	Randomised. Similar at baseline except for presence of other safety programmes (intervention schools 55%, control schools 30%) ‐ unlikely to have had a major effect on travel mode outcomes