Table 4 Item to total correlations and internal reliability consistency of PDQ-Carer Scales
From: Spanish version of the Parkinson’s Disease Questionnaire–Carer (PDQ-Carer)
Items of the PDQ-Carer | Cronbach’s alpha | Corrected alpha | Item-test |
|---|---|---|---|
Personal and Social Activities (12 items) | 0.95 | ||
Item 5. Been prevented from pursuing hobbies and other interests? | 0.94 | 0.80 | |
Item 8. Felt that relationships with friends have been affected? | 0.94 | 0.79 | |
Item 14. Felt more withdrawn because of your caring role? | 0.95 | 0.73 | |
Item 18. Been limited in what you can do socially? | 0.94 | 0.80 | |
Item 19. Felt that your workload around the house has increased significantly? | 0.95 | 0.77 | |
Item 20. Found it difficult to see friends and family? | 0.94 | 0.86 | |
Item 21. Found it difficult to leave the person you care for alone for more than one hour? | 0.95 | 0.74 | |
Item 24. Felt that you cannot do things on the spur of the moment? | 0.95 | 0.63 | |
Item 25. Found it difficult to be involved in regular activities which require commitment, e. g. volunteering work, regularly meeting friends? | 0.94 | 0.90 | |
Item 27. Felt unable to go on holiday or take short breaks? | 0.95 | 0.74 | |
Item 28. Felt responsible for Parkinson’s disease medication being available and taken at appropriate times? | 0.95 | 0.69 | |
Item 29. Had to limit outings because you worry that the person you care for won’t be able to cope? | 0.95 | 0.77 | |
Anxiety and Depression (6 items) | 0.85 | ||
Item 4. Felt anxious because of the responsibility of caring? | 0.82 | 0.69 | |
Item 6. Felt worried about your own physical health? | 0.83 | 0.61 | |
Item 11. Felt worried about the future? | 0.82 | 0.65 | |
Item 12. Felt you lacked the energy and motivation to do the things you enjoy? | 0.82 | 0.67 | |
Item 15. Felt depressed? | 0.83 | 0.62 | |
Item 17. Felt worried about what would happen if you were unwell? | 0.83 | 0.61 | |
Sef Care (5 items) | 0.85 | ||
Item 2. Found it difficult to get out, for example, to do the shopping? | 0.82 | 0.67 | |
Item 3. Found the demands of caring physically difficult? | 0.80 | 0.74 | |
Item 13. Taken less care with your diet? | 0.86 | 0.51 | |
Item 22. Felt that your physical health has been affected by your caring role? | 0.81 | 0.73 | |
Item 26. Paid less attention to your own health (e.g. put off visiting a doctor, ignored symptoms etc)? | 0.82 | 0.69 | |
Strain (6 items) | 0.80 | ||
Item 1. Found you could not sleep through the night? | 0.79 | 0.48 | |
Item 7. Thought that your caring role was taken for granted by others? | 0.84 | 0.33 | |
Item 9. Felt impatient with the person you care for? | 0.76 | 0.63 | |
Item 10. Felt exhausted? | 0.72 | 0.81 | |
Item 16. Felt less in control of your temper than before you became a carer? | 0.76 | 0.64 | |
Item 23. Felt that you are responsible for everything at home? | 0.76 | 0.61 |