Table 2.

Mapping of the COM-B to TDF Domains and Strategies to Develop the Semi-Structured Interview Guide.

Capabilities-Opportunities-Motivation (COM-B) Framework Domains	TDF Construct	Interview Questions
Psychological Capability	Knowledge, Memory, Attention, and Decision Processes	How (if at all) did the fresh food program change your shopping habits in relation to fresh foods?
		Before receiving the food prescription box, how many times per month would you buy fresh fruits and vegetables? Why?
		How (if at all) did receiving the fresh food box influence how often you eat fresh fruits and vegetables?
Physical Capability	Skills	How many times have you cooked the recipe in the newsletter?
		What other ways could this program help you cook the produce from the fresh food box?
Physical Opportunity	Environmental Context and Resources	Did you have everything you needed to cook the recipe provided? Prompt: ingredients, cooking equipment
		How easy or difficult is it for you to get fresh fruits and vegetables? What makes it hard for you to buy fresh fruits and vegetables? What would make it easier for you to buy fresh fruits and vegetables?
		Where do you usually go to get fresh fruits and vegetables?
Social Opportunity	Social Influences	Tell me about you or your family’s experience with the fresh food box you received each week.
		How (if at all) did your family benefit from the fresh food program?
Reflective Motivation	Role and Identity Beliefs about Capabilities and Intentions	What are the main reasons you like to shop where you do for fresh fruits and vegetables?
		What motivates you to eat healthy?
Program Quality and Feedback (not COM-B)		What did you like about the nutrition letter included in the box? What didn’t you like, or what content would you like to see in the nutrition letter ongoing?
		What were your opinions about the delivery of the fresh foods to your home? What went well with the delivery? What didn’t go well?