Table 3 Ranking of items based on Rescaled Probability Score (RPS)

1

Arthritis medications help to reduce my symptoms

Motivation: 8/10

2

I can maintain my independence as much as possible

Motivation: 8/10

3

I can decide – together with my physician - about my arthritis medications

Capability: 4

4

My general health (apart from my inflammatory arthritis)

Motivation: 7/10/11

5

I expect the arthritis medications will help to reduce my symptoms

Motivation: 8

6

I am glad arthritis medications are available

Motivation: 9

7

There are no side effects from my arthritis medications

Motivation: 7/8/10

8

I can cope with my inflammatory arthritis

Capability and Motivation: 7/2

9

The relationship with my physician

Capability, Opportunity and Motivation: 4/6/10

10

I can get to my physician (accessibility, availability, timely access/when needed)

Opportunity: 5

11

My knowledge about my arthritis medications is sufficient (e.g. how the medications work, when and how often I need to take my medications)

Capability: 1

12

I have accepted my disease

Capability and Motivation: 7/8/10/2

13

I understand what my treatment with medications encompasses

Capability: 1

14

I am anxious about how my arthritis medications affect my body

Motivation: 9

15

I expect to be more able to participate in social activities

Motivation: 8

16

The reimbursement of my arthritis medications by the health insurance company

Capability and Opportunity: 1/4/6/5

17

I have accepted the need for my arthritis medications

Capability and Motivation: 7/8/10/2

18

The support from family and/or friends

Capability, Opportunity and Motivation: 3/6/11

19

I have another chronic condition (apart from my inflammatory condition)

Motivation: 7/10/11

20

I can open the medication packaging

Capability and Motivation: 10/2

21

I can incorporate my arthritis medications into daily routines

Capability and Motivation: 3/7/10/11

22

My arthritis medications are easy to use (e.g. the size of the tablets)

Capability, Opportunity and Motivation:7/10/11/5

23

The name and/or appearance (color, shape) of my arthritis medications does not change

Capability and Opportunity 3/5

24

It is easy to travel with my arthritis medications, e.g. go abroad (able to keep my arthritis medications at a low temperature, clearance from customs/airline)

Opportunity: 5

25

My arthritis medications are expensive (a burden to society)

Opportunity: 5

26

I can get to the pharmacy (e.g. accessibility, e.g. my arthritis medication is in stock)

Opportunity: 5

27

I have good communication skills (e.g. to discuss my arthritis medications)

Capability: 4/2

28

The way I have to administer my arthritis medications (injection or tablet)

Capability and Motivation: 1/7/10

29

The support from my colleagues/supervisor in the workplace

Capability, Opportunity and Motivation: 6/10/11

30

The experiences of other patients with these arthritis medications

Capability, Opportunity and Motivation: 6/11

31

What the medication regimen for my arthritis medications includes (simple or complex drug regimen)

Motivation: 10

32

I am sad I have to take my arthritis medications throughout my life

Motivation: 9

33

I am angry that I have to take my arthritis medications throughout my life

Motivation: 9

34

The relationship with my pharmacist

Capability, Opportunity and Motivation: 4/6/10

35

The availability of aids (reminders such as electronic messages) in order to take the arthritis medications as prescribed by the physician

Capability and Motivation: 3/7/11