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Table 6 Summary of changes to Itch Diary and PBC-40 as a result of cognitive interviews

From: Development and adaptation of patient-reported outcome measures for patients who experience itch associated with primary biliary cholangitis

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
  1. AM, morning; PBC, primary biliary cholangitis; PM, evening