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Table 2 COM-B analysis demonstrating intervention functions and BCTs to change diet in target population

From: Development of a peer support intervention to encourage dietary behaviour change towards a Mediterranean diet in adults at high cardiovascular risk

Barriers to adopting a MD in adults at high CVD risk [28] COM-B analysis Intervention functions BCTs [23] to best serve intervention functions
Lack of knowledge about the types/proportions of foods consumed Psychological capability Education
Training
Enablement
Instruction on how to perform the behaviour
Demonstration of the behaviour
Limited cooking skills to prepare meals Physical capability Training
Enablement
Instruction on how to perform the behaviour
Behavioural practice
Demonstration of the behaviour
Resistance to change eating habits established since childhood, especially to reduce intake of red/processed meats and sweet foods Automatic motivation Modelling
Persuasion
Enablement
Social support (unspecified)
Problem-solving
Goal setting (behaviour)
Action planning
Feedback on behaviour
Set graded tasks
Increased cost for purchasing key foods especially olive oil, nuts and fruits and vegetables Physical opportunity Training
Enablement
Instruction on how to perform the behaviour
Demonstration of the behaviour
Increased time to prepare meals owing to busy lifestyles Physical opportunity Training
Enablement
Instruction on how to perform the behaviour
Demonstration of the behaviour
Limited availability of fresh foods especially fresh fish, fruit and vegetables Physical opportunity Training
Enablement
Instruction on how to perform the behaviour
Lack of understanding about the health benefits of adopting a MD Psychological capability Education
Training
Enablement
Information about health consequences
Biofeedback
Negative attitude toward increasing total fat intake Reflective motivation Education
Persuasion
Information about health consequences
Instruction on how to perform the behaviour
Demonstration of the behaviour
Cold climate making it difficult to eat foods such as salads, fruit and vegetables Physical opportunity Training
Enablement
Social support (unspecified)
Verbal persuasion
Problem-solving
Cultural norms making it difficult to change dietary behaviour Social opportunity Modelling Enablement Instruction on how to perform the behaviour
Demonstration of the behaviour
Negative attitude toward the taste of key foods especially olive oil, nuts and fish Reflective motivation Education
Persuasion
Instruction on how to perform the behaviour
Demonstration of the behaviour Social support (unspecified)
  1. MD Mediterranean diet, CVD Cardiovascular, COM-B Capability, Opportunity, Motivation – Behaviour Model, BCTs Behaviour Change Techniques