Table 2.
Comparison of missing data, ceiling effects and internal consistency between the two randomised groups
| Scale and item* | Group A | Group B | ||||||
| Missing data (%) | Not applicable (%) | Ceiling effects (%) | Cronbach’s alpha/item-total correlation | Missing data (%) | Not applicable (%) | Ceiling effects (%) | Cronbach’s alpha/item-total correlation | |
| GP | 0.924 | 0.935 | ||||||
| Do you feel that your GP takes you seriously? | 5.0 | 3.4 | 48.0 | 0.762 | 0.0 | 2.9 | 52.2 | 0.813 |
| Do you feel that your GP spends enough time with you? | 4.9 | 3.2 | 28.9 | 0.702 | 0.0 | 3.2 | 32.7 | 0.745 |
| Do you feel that your GP talks to you in a way you understand? | 5.1 | 3.0 | 48.9 | 0.737 | 0.3 | 2.3 | 56.0 | 0.735 |
| Do you feel that your GP is professionally competent? | 5.2 | 4.0 | 41.8 | 0.752 | 0.6 | 2.9 | 43.1 | 0.805 |
| Do you feel that your GP shows interest in your situation? | 5.3 | 3.5 | 39.5 | 0.818 | 0.6 | 2.3 | 39.9 | 0.853 |
| Do you feel that your GP includes you as much as you would like in decisions concerning you? | 5.7 | 7.7 | 37.2 | 0.769 | 0.3 | 6.5 | 41.9 | 0.803 |
| Does your GP provide you with sufficient information about your health problems and their treatment? | 5.6 | 7.3 | 32.7 | 0.811 | 0.3 | 6.1 | 34.1 | 0.835 |
| Does your GP provide you with sufficient information about the use and side effects of medication? | 5.4 | 16.3 | 21.0 | 0.631 | 0.0 | 16.5 | 24.3 | 0.655 |
| Does your GP refer you to further examinations or a specialist when you feel you need it? | 5.1 | 10.6 | 43.2 | 0.646 | 0.3 | 10.6 | 49.3 | 0.633 |
| Organisation and auxiliary staff | 0.868 | 0.851 | ||||||
| Do you feel that your GP’s practice is well organised? | 5.2 | 4.1 | 26.6 | 0.681 | 1.0 | 1.6 | 25.8 | 0.615 |
| Do you feel the other employees are helpful and competent? | 4.9 | 3.6 | 36.1 | 0.813 | 0.3 | 2.9 | 31.7 | 0.806 |
| Are you treated with courtesy and respect at the reception? | 4.8 | 3.2 | 40.9 | 0.752 | 0.3 | 2.6 | 39.5 | 0.750 |
| Accessibility | 0.774 | 0.688 | ||||||
| Was the waiting time for your last urgent appointment acceptable? | 18.7 | – | 36.2 | 0.631 | 17.1 | – | 33.5 | 0.525 |
| Is this waiting time for appointments that are not urgent acceptable? | 12.3 | – | 18.0 | 0.631 | 6.8 | – | 11.4 | 0.525 |
| Enablement | 0.906 | 0.925 | ||||||
| Does contact with your GP make you better able to understand your health problems? | 1.6 | 16.6 | 19.5 | 0.803 | 1.0 | 15.8 | 26.0 | 0.836 |
| Does contact with your GP make you better able to cope with your health problems? | 1.6 | 19.7 | 16.3 | 0.852 | 0.6 | 20.3 | 21.2 | 0.875 |
| Does contact with your GP better help you to stay healthy? | 1.6 | 19.8 | 15.1 | 0.786 | 0.3 | 20.6 | 21.6 | 0.833 |
| Coordination and cooperation | 0.875 | 0.876 | ||||||
| Do you feel that your GP is good at coordinating the range of health services available to you? | 5.9 | 26.9 | 28.1 | 0.779 | 0.6 | 30.6 | 34.7 | 0.790 |
| Do you feel that your GP cooperates well with other services you need? | 5.7 | 29.4 | 29.0 | 0.779 | 0.6 | 31.9 | 29.7 | 0.790 |
*All items were scored on a 5-point response scale ranging from 1 (‘not at all’) to 5 (‘to a very large degree’).
GP, general practitioner.