TAPESTRY Herts 2003.

Methods	Design: Controlled before‐after study Duration of follow‐up: 3 weeks
Participants	Country: United Kingdom Setting: Urban primary schools in North Hertfordshire Intervention group: 11 schools, 1846 baseline responses Control group: 2 schools, 347 baseline responses Age: primary schoolchildren. Gender not reported.
Interventions	Walk to school campaign: ‐ Education packs linked to curriculum ‐ Promotional material: posters, banners etc. Duration of intervention: 1 week
Outcomes	Travel mode: proportion of children using mode at least once per week (walking, car, cycling) Effects on inequalities not reported. Adverse effects not reported.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	High risk	Not randomised
Allocation concealment?	High risk	Not randomised
Blinding? All outcomes	High risk	Not feasible. Could have influenced outcomes
Incomplete outcome data addressed? All outcomes	High risk	Approximately 52% of baseline survey responses had a matched post‐intervention survey response, so loss to follow‐up high. Could be associated with outcome
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?	Unclear risk	Schools appear to have self‐selected to intervention or control with no apparent attempt at matching. Baseline travel mode data relatively similar, however