Table 1.

Summary of theoretical domains adopted for data collection and analysis

Actors	Contextual factors	Processes	Content	Outcomes
• Roles of actors ▪ Institutions ▪ Government policymakers & officers ▪ Actors responsible for implementation (school leaders, vendors) • Actors exercising agency • Motivation (interests, incentives) • Capacity (resources, cognition)	• Political • Environmental • Cultural • Institutional structures and mandates • Resources	• Planning • Resources • Communication • Coordination • Monitoring • Incentives • Enforcement	• Policy clearly constructed • Specificity of policy • Evidence-based change outcome • Acknowledges risks, addresses risks • Enforceable within mandate	• Foods available in schools • Perceived healthfulness of foods in schools • Types of foods perceived as healthy • Sense of priority for school nutrition