Table 3 Item-total correlations for the original and the reduced ABQ
Item | Original 16-item ABQ | Reduced 14-item ABQ | ||
|---|---|---|---|---|
(Cronbach’s α: 0.814) | (Cronbach’s α: 0.820) | |||
Item-total correlation coefficient | Cronbach’s α if item is deleted | Item-total correlation coefficient | Cronbach’s α if item is deleted | |
Item 1: “I fully understand what my doctor, nurse or the people at my pharmacy have explained to me so far”. | 0.599 | 0.795 | 0.634 | 0.798 |
Item 2: „I can mention the names of my medicines and their scope without hesitation”. | 0.371 | 0.808 | 0.397 | 0.813 |
Item 3: „I trust my doctor and agree to my therapy plan together with him”. | 0.461 | 0.805 | 0.443 | 0.811 |
Item 4: “My medications help me only if I take them absolutely regularly as recommended”. | 0.394 | 0.808 | 0.375 | 0.814 |
Item 5: „Medicines are all poisonous. You should avoid taking medicines at all if possible”. | 0.263 | 0.815 | - | - |
Item 6: „I feel basically healthy. Therefore I am sometimes unsure whether I really have to take my medicines daily”. | 0.225 | 0.817 | - | - |
Item 7: „I take my medicines every day automatically at a fixed time or on fixed occasions”. | 0.351 | 0.809 | 0.326 | 0.816 |
Item 8: „I feel that co-payments for medicines are a great burden”. | 0.400 | 0.807 | 0.395 | 0.814 |
Item 9: „I frequently forget things on an everyday basis”. | 0.416 | 0.804 | 0.431 | 0.81 |
Item 10: „Generally I often feel bad, and sometimes I feel discouraged and depressed”. | 0.534 | 0.796 | 0.567 | 0.799 |
Item 11: „I frequently have problems taking my medications or it is difficult for me to keep me on the accompanying conditions of the medication intake”. | 0.634 | 0.789 | 0.640 | 0.793 |
Item 12: „I have to overcome obstacles to my healthcare”. | 0.505 | 0.798 | 0.546 | 0.801 |
Item 13: „I really would need help on an everyday basis (and particularly related to my treatment with medicines). But I do not get any help”. | 0.600 | 0.792 | 0.610 | 0.796 |
Item 14: „I am really frightened of the side effects of my medicines”. | 0.424 | 0.804 | 0.393 | 0.812 |
Item 15a: „In case I already noticed or in case I would notice side effects related to my medicines: I have talked or would talk to my doctor about them as soon as possible”. | 0.274 | 0.812 | 0.265 | 0.819 |
Item 15b: „In case I already noticed or in case I would notice side effects related to my medicines: I have stopped/would stop my medications or took/would take less of them”. | 0.373 | 0.808 | 0.337 | 0.818 |