Nakayama 2005.

Methods	Design: Controlled before and after study Two intervention groups, one control group. Duration of follow‐up: 2 months
Participants	Country: Japan Setting: Two tertiary education institutions Intervention groups: Coordinators n=15. Participants n=44. Control group n= 92. Age: third and fourth‐year tertiary students. Gender not reported.
Interventions	A program organiser trains ecotravel co‐ordinators. Ecotravel co‐ordinators organise meetings with participants, and provide advice on reducing car use. Duration of intervention: 2 months.
Outcomes	Travel mode: ‐ Car mileage ‐ Frequency of 'eco friendly mode' use (bus, train and walking) 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 outcome.
Incomplete outcome data addressed? All outcomes	High risk	Loss to follow‐up at second survey ranges from 27‐39%. Reasons not explored but could be associated with outcome.
Free of selective reporting?	High risk	Cycling was discussed but not reported on: "bike use depends highly on weather and is very changeable; therefore it is not considered in the analysis" p.228
Free of other bias?	High risk	Individual participants self‐selected to study groups
Adequate matching of intervention / control groups?	High risk	Control group had substantially lower rates of 'ecofriendly mode use' at baseline. Baseline 'ecofriendly mode use' frequency was 8.01 in control group, compared with 15.73 in co‐ordinator group.