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Table 1 Items grouped according to TDF domains and COM components

From: Ranking facilitators and barriers of medication adherence by patients with inflammatory arthritis: a maximum difference scaling exercise

COM-B Domain Item
CAPABILITY
 1 Knowledge • My knowledge about my arthritis medication is sufficient (e.g. how the medications work, when and how often I need to take my medications)
• I understand what my treatment with medications encompasses
• The reimbursement of my arthritis medications by the health insurance company
• The way I have to administer my arthritis medications (injection or tablet)
 2 Skills • I can cope with my inflammatory arthritis
• I have accepted my disease
• I have accepted the need for my arthritis medications
• I can open the medication packaging
• I have good communication skills (e.g. to discuss my arthritis medications)
 3 Memory and attention • The support from family and/or friends
• I can incorporate my arthritis medications into daily routines
• The name and/or appearance (colour, shape) of my arthritis medications does not change
• The support from my colleagues/supervisor in the workplace
• The availability of aids (reminders such as electronic messages) in order to take the arthritis medications as prescribed by the physician
 4 Decision-making process • I can decide – together with my physician – about my arthritis medications
• The relationship with my physician
• The reimbursement of my arthritis medications by the health insurance company
• I have good communication skills (e.g. to discuss my arthritis medications)
• The relationship with my pharmacist
OPPORTUNITY
 5 Environmental context and resources • I can get to my physician (accessibility, availability, timely access/when needed)
• The reimbursement of my arthritis medications by the health insurance company
• My arthritis medications are easy to use (e.g. the size of the tablet)
• The name and/or appearance (colour, shape) of my arthritis medications does not change
• It is easy to travel with my arthritis medication, e.g. to go abroad (able to keep my arthritis medications at a low temperature, clearance from customs/airline
• My arthritis medications are expensive (a burden to society)
• I can get to the pharmacy (e.g. accessibility, e.g. my arthritis medication is in stock)
 6 Social influences • The relationship with my physician
• The reimbursement of my arthritis medications by the health insurance company
• The support from family and/or friends
• The support from my colleagues/supervisor in the workplace
• The experiences of other patients with these arthritis medications
• The relationship with my pharmacist
MOTIVATION
 7 Beliefs about capabilities • My general health (apart from my inflammatory arthritis)
• There are no side effects from my arthritis medications
• I can cope with my inflammatory arthritis
• I have accepted my disease
• I have accepted the need for my arthritis medications
• I have another chronic condition (apart from my inflammatory condition)
• I can incorporate my arthritis medications into daily routines
• My arthritis medications are easy to use (e.g. the size of the tablet)
• The way I have to administer my arthritis medications (injection or tablet)
• The availability of aids (reminders such as electronic messages) in order to take the arthritis medications as prescribed by the physician
 8 Beliefs about consequences • Arthritis medications help to reduce my symptoms
• I can maintain my independence as much as possible
• I expect the arthritis medications will help to reduce my symptoms
• There are no side effects from my arthritis medications
• I have accepted my disease
• I expect to be more able to participate in social activities
• I have accepted the need for my arthritis medications
 9 Emotions • I am glad arthritis medications are available
• I am anxious about how my arthritis medications affect my body
• I am sad I have to take my arthritis medications throughout my life
• I am angry I have to take my arthritis medications throughout my life
 10 Motivation and goals • Arthritis medications help to reduce my symptoms
• I can maintain my independence as much as possible
• My general health (apart from my inflammatory arthritis)
• There are no side effects from my arthritis medications
• The relationship with my physician
• I have accepted my disease
• I have accepted the need for my arthritis medications
• I have another chronic condition (apart from my inflammatory condition)
• I can open the medication packaging
• I can incorporate my arthritis medications into daily routines
• My arthritis medications are easy to use (e.g. the size of the tablet)
• The way I have to administer my arthritis medications (injection or tablet)
• The support from my colleagues/supervisor in the workplace
• What the medication regimen for my arthritis medications includes (simple or complex drug regimen)
• The relationship with my pharmacist
 11 Goal conflict • My general health (apart from my inflammatory arthritis)
• The support from family and/or friends
• I have another chronic condition (apart from my inflammatory condition)
• I can incorporate my arthritis medications into daily routines
• My arthritis medications are easy to use (e.g. the size of the tablet)
• The support from my colleagues/supervisor in the workplace
• The experiences of other patients with these arthritis medications
• The availability of aids (reminders such as electronic messages) in order to take the arthritis medications as prescribed by the physician
  1. Note: Some determinants were grouped by patients under more than one domain