Outcome measures | |
Comprehension of information (5 questions) (composite: number of correct responses, range 0-5) | |
1. |  Which hospital has procedures to prevent adverse effects of thrombosis? |
2. |  What is the performance of hospital A concerning the number of performed hip- or knee replacements among adults in a year? |
3. |  Which hospital is according to you the best when it comes to the conduct of doctors? |
4. |  Which hospital is the worst when it comes to procedures to prevent adverse effects of thrombosis? |
5. |  What is the performance of hospital B concerning the conduct of doctors? |
Perceived usefulness of information (7 questions) (item: range 1-4*) (composite: range 7-28) | |
1. |  I think this information is handy |
2. |  I think this information is nice to look at |
3. |  I think this information is useful |
4. |  I think this information is not interesting (R) |
5. |  I think this information is important |
6. |  This information does not mean a lot to me (R) |
7. |  I would like to use this information if I had to make a hospital choice |
Hospital choice (1 question) (correct response; 0=wrong; 1=correct) | |
1. |  Which hospital would you choose if you needed a hip- or knee surgery? |
Ease of hospital choice (1 question) (range -3 (very difficult) - 3 (very easy)) | |
1. |  How difficult was it for you to make a choice between the hospitals? |
Predictors | |
Literacy (gap text; 5 missing words) (composite: number of correct responses, range 0-5) | |
Numeracy (3 questions) (composite: number of correct responses, range 0-2^) | |
1. |  Imagine that we flip a coin 1.000 times. What is your best guess about how many times the coin would come up heads in 1.000 flips? …times out of 1000 |
2. |  In the ‘state lottery’, the chance of winning a €10 is 1%. What is your best guess about how many people would win a €10 prize if 1000 people each buy a single ticket?  …person(s) out of 1.000 |
3. |  In ‘the sponsor bingo lottery’, the chance of winning a car is 1 in 1.000. What percent of tickets of ‘the sponsor bingo lottery’ win a car? ….%^ |
Active choice behaviour (search & selection behaviour scale) (6 questions) (item: range 1-4#) (composite: range 6-24) | |
1. |  It doesn’t matter too much to me where and by whom I am treated. |
2. |  I don’t want to invest too much time and energy in the choice process. |
3. |  If I need care, I usually go the therapist/care facility to which my GP or specialist has referred me. |
4. |  If I need care, I usually investigate thoroughly how, where and from whom I will receive the best treatment (R). |
5. |  I have experience with the health care system and therefore know which therapist or care facility is best for me (R). |
6. |  I think it’s important to weigh possible treatments, therapists and care facilities against each other properly (R). |