Table 6 Summary of changes to Itch Diary and PBC-40 as a result of cognitive interviews
Measure | Total Items in Final Measure | Items Left Unchanged | Items Removed | Items Added | Items Revised, n, Description |
|---|---|---|---|---|---|
AM Itch Diary | 7 | 4 | 1 | 1 | 2 Item wording revised – 1 Response scale revised – 1 |
PM Itch Diary | 11 | 1 | 1 | 2 | 8 Item wording revised – 5 Response scale revised – 7 |
PBC-40 | 43 | 35 | 0 | 0 | 8 Item wording revised – 7 Response scale revised – 1 |