Criteria to determine progression to definitive trial
nurseries):Green
Quantitative criteria were established with reference to a previous feasibility and acceptability cluster trial that recruited 2–4-year-olds for a healthy-eating intervention in childcare settings [The criteria for assessing the feasibility and acceptability of the intervention were mapped onto the study’s primary outcomes:
Children’s willingness to eat some part of the vegetables when offered to them at breakfast (intervention nurseries):Green: > 60% (of instances where vegetables were offered)Amber: 40–60%Red: < 40%Number of instances where data collection by nursery staff is incomplete:Green: < 30%Amber: 30–40%Red: > 40%Proportion of eligible children whose parents/caregivers opted them into the study:Green: > 80%Amber: 60–80%Red: < 60%