Table 1 Eligibility criteria

Population: children undertaking primary education aged between 4 and 11 years

Population: people outside the specified age range and animal models

Intervention: diet or physical activity related school policies either alone or as part of intervention programmes

Intervention: policy components which are insufficiently described to enable replication.

Outcome: body mass index (using valid reference curves to define overweight and obesity), body mass index z-score or standard deviation score, percentage of body fat, waist circumference, waist-to-hip ratio, waist-to-height ratio, skin pinch/skin fold thickness

Outcome: change in diet, physical activity or knowledge

Context: primary school or equivalent

Context: clinical settings

Study design: any experimental or observational study design (randomised controlled trial, controlled before and after study, interrupted time series, cohort study or cross-sectional study)

Study design: narrative reviews, editorials, opinions and letters, reports published as meeting abstracts only (where insufficient methodological details are reported to allow critical appraisal of study quality)

Follow-up: ≥6 months [21]

Follow-up: <6 months