Table 7.

Quotes from participants regarding facilitators of uptake of the MIND diet

Northern Ireland			Rome
COM-B/TDF	SUBTHEME	QUOTE	COM-B/TDF	SUBTHEME	QUOTE
Reflective motivation: Belief about consequences	1. Feel better generally 2. Improve psychological health 3. Improve memory	“I think the diet would just help you feel better generally” “And even help your head, less stress and worry”	Physical Opportunity: Environmental context and Resources	1. Bring lunch 2. Time	“Here I bring lunch every day, it is very simple for me to prepare my salads so not a barrier” “Having the time to travel to get better quality food would be a facilitator”.
Reflective motivation: Belief about capabilities	1. Planning/ preparation/ organisation	“Organisation and preparation the night before, so having your berries and salad ready for work”	Reflective motivation: Belief about capabilities	1. Normal diet 2. Simple meals 3. Organisation 4. Motivation	“sometimes it is easier for all the family if you can cook it quickly, like pasta and veg” “If you were motivated enough, I think you could overcome your barriers”. “I think you need to plan and be motivated”.
Physical opportunity: Environmental context and resources	1. Accessibility fresh/frozen food 2. Bring lunch to work	“I would go to Lidl, because it is cheaper and better quality” “In my work, you need to be prepared and bring lunch with you”	Reflective motivation: Belief about consequences	1. Overall health 2. Cholesterol 3. Lose weight 4. Fiber/bowel	“I think this diet could help you gain more health” “I think my bowels would work better on this diet” “I think with eating less cheese would be good for your cholesterol” “I think you could lose weight on this diet”
Social opportunity: Social influence	1. Family support/influence	“My mum is always cutting out articles showing me research on good and bad foods for your health.	Social opportunity: Social influence	1. Family support/ influence	“Yes, my wife would support me if I wanted to do this diet” “yes, I think if I was out with family, there would be more alcohol, unhealthy foods and less veg”
Physical capability: Skills	1. Confident cook	“I am pretty confident cooking these foods”	Physical capability: Skills	1. Confident cook	“Yes, I cook generally the same legumes, I don’t like beans very much so I don’t cook them often, but I am able to cook them”
Automatic motivation: Emotion	1. Positive	“I would be positive about it, I get excited trying new things”	Reflective motivation Professional, social and identity	1. Culture	“this is typical foods for me, this would not be difficult for me” “we don’t eat butter, it is not in our culture, we use olive oil”
			Automatic motivation Emotion	1. Positive	“I would feel positive about doing this diet”

COM-B Capability, Opportunity, Motivation, Behaviour, TDF Theoretical domains framework