Cities for Better Health Childhood Obesity Prevention Initiative

To be eligible to be involved in data collection, children must attend the 'clusters' (schools) that are part of the study. In each cluster, country evaluation teams will try to ensure that the sample of children selected for data collection is representative of the total population in that cluster (e.g. the full list of students ages 6-13 who go to that school) - in particular, with respect to age and sex. All countries will also use the inclusion and exclusion criteria below for children in the study: Inclusion Criteria: * Informed consent obtained by the child's parent or legal guardian before any study-related activities (where study-related activities are defined as any procedure related to recording of data according to the protocol). The specific consent form and procedures for obtaining consent will be outlined by the local project partner. * Aged 6-13 years (both 6 and 13 allowed) at the time of signing consent. Deviations from or exceptions to this procedure must be agreed between the research team in the relevant country and the GIP, and are subject to the relevant local ethical amendment procedure. The exception must be due to a scientifically sound rationale and must further consider the following guiding principles: "it must be measurable, it must have marginal utility, it must be meaningful (i.e. linked to the ultimate impact and the primary and/or secondary objective)". Exclusion Criteria: \- Children will be excluded from the study if their parent(s) do …