Table 2.

Mapping of themes based on the COM-B model

Broad components of COM-B model	Themes	Subthemes
Capability	Psychological	Insufficient knowledge of nutrition
		Misconceptions about the disease and treatment
		Knowledge conflict
	Physical	Physical restriction
		Limited access to nutrition knowledge
Opportunity	Physical	Communication between providers and patients
		Health insurance and extra charges
		Food environment
	Social	Stigma of disease
		Family influence
Motivation	Reflective	Self-efficacy
		Attitude
		Outcome expectancies
		Lack of professional support
	Automatic	Difficulties in changing eating habits
		Mindset

COM-B, Capability, Opportunity and Motivation-Behaviour.